San Diego Whole Home Electrification Decision Pack
Heat Pump HVACHeat Pump Water HeaterEV Charger InstallationSolar PanelsBattery StorageElectrical Panel Upgrade
What this pack covers
This Decision Pack covers a coordinated Heat Pump HVAC, Heat Pump Water Heater, EV Charger Installation, Solar Panels, Battery Storage, and Electrical Panel Upgrade project in San Diego, CA.
It assembles cost ranges, incentive eligibility, permit requirements, and the questions to ask before signing a contract. Every dollar figure and incentive shown is dated and sourced.
Your goal in one sentence
Sequence a whole-home electrification in San Diego across heat pump HVAC, heat pump water heater, EV charging, solar plus battery, and electrical panel work so panel capacity is sized once for the full future load, City of SD DSD permits and trades are coordinated under a single project lead, SDAPCD Rule 69.5.1 NOx limits are checked on any retained gas appliance, and incentive reservations (SGIP RSSE waitlist via CSE — the only SGIP tier accepting new applications as of 2026; TECH or HEEHRA waitlist status; any active SDCP program) are stacked in the right order before equipment is delivered.
Recommended sequence
- Electrical Panel Upgrade — No prerequisites within this pack.
- Heat Pump HVAC — Depends on prior steps: Electrical Panel Upgrade
- Heat Pump Water Heater — Depends on prior steps: Electrical Panel Upgrade
- EV Charger Installation — Depends on prior steps: Electrical Panel Upgrade
- Solar Panels — No prerequisites within this pack.
- Battery Storage — No prerequisites within this pack.
Who to contact
| Who | Why | What to ask for |
|---|---|---|
| Electrification-focused HVAC contractor | Designs the heat pump HVAC system and handles ducting, load calculations, rebates, and permits. | Gas furnace to central heat pump conversion, Manual J load calculation, duct assessment, rebate handling. |
| Licensed electrician | Validates panel/service capacity for future electric load; recommends panel upgrade vs smart load management. | Panel size, service size, formal load calculation, upgrade vs load-management options. |
| Heat pump water heater contractor / plumber-electrician team | Heat pump water heaters need space, condensate drain, airflow, and often a dedicated electrical circuit. | Gas tank to heat pump water heater quote, location assessment, electrical requirements, rebate paperwork. |
| Licensed electrician or EV-charger-certified contractor | Sizes the charger, runs the dedicated 240V circuit, handles permit and inspection. | Level 2 charger model, dedicated 240V circuit, permit handling, load-share strategy for multi-EV households. |
| Solar + battery installer | Models solar production, battery behavior, NEM 3.0 economics, backup loads, and EV charging impact. | Solar scenario, battery scenario, future load model, backup-loads plan, EV charging plan. |
Opening script to send contractors
Hi, I'm in San Diego, CA and planning a project that includes Heat Pump HVAC, Heat Pump Water Heater, EV Charger Installation, Solar Panels, Battery Storage, Electrical Panel Upgrade. I am looking for a quote that includes: 1. Heat Pump HVAC 2. Heat Pump Water Heater 3. EV Charger Installation 4. Solar Panels 5. Battery Storage 6. Electrical Panel Upgrade Please tell me: - Will you perform a formal load calculation (Manual J for HVAC, Article 220 for electrical)? - Are you familiar with San Diego permits and any local rebate programs? - Can you give line-item pricing and separate confirmed incentives from assumed incentives? - Who handles permits, inspections, and rebate paperwork?
Technical basics in plain English
Panel size: 100A, 125A, 150A, 200A
Your electrical panel is the main entry point for electricity into your house. The 'A' means amps. More amps means more total electrical capacity. 100A is older and may not support adding heat pump + water heater + EV charger together without an upgrade or smart load management. 125A/150A is middle ground; could work with efficient equipment and a real load calculation. 200A is usually the cleanest path, but not guaranteed.
Ask: What is my panel size, and can you show me the load calculation that proves this setup is safe?
Load calculation
A load calculation is not the same as guessing. It is a code-based calculation that estimates whether your panel and service can safely carry all major electrical loads. A qualified electrician or contractor should be able to explain whether you need a panel upgrade, a service upgrade, or smart load management instead.
Ask: Are you doing a formal electrical load calculation, or just eyeballing the panel?
120V vs 240V
Normal outlets are usually 120V. Large appliances often use 240V, like a dryer or EV charger. Many heat pump HVAC systems, EV chargers, and some water heaters need 240V.
Ask: Which parts of this project require 240V?
Smart load management
Smart load management lets devices avoid running at full power at the same time. For example, the EV charger may slow down while the heat pump or water heater is running. This can sometimes avoid an expensive panel or service upgrade.
Ask: Can smart load management avoid a service upgrade while still supporting future loads?
Manual J load calculation (HVAC)
Manual J is the standard HVAC sizing calculation. It accounts for home size, insulation, windows, orientation, and ductwork. A good HVAC contractor performs Manual J before sizing the equipment; bad contractors just match the existing furnace tonnage.
Ask: Will you perform a Manual J load calculation before sizing the equipment?
Battery backup: whole-home vs essential-loads
Whole-home backup tries to power almost everything during an outage. Essential-loads backup powers selected circuits (refrigerator, internet, lights, some outlets). Whole-home backup costs more and drains batteries faster. Essential-loads backup is usually more economical.
Ask: Are you quoting whole-home backup or essential-loads backup? Which specific circuits will be backed up?
Specific questions to ask
Questions for HVAC contractors
| Question | Good response | Bad response |
|---|---|---|
| Will you perform a Manual J load calculation before sizing the heat pump? | Yes. We calculate heating and cooling load based on home size, insulation, windows, orientation, ductwork, and infiltration. | We just replace the existing furnace with the same tonnage system. |
| Will you inspect ducts before specifying the heat pump? | Yes. We inspect duct size, leakage rate, return air paths, and airflow because heat pumps need good airflow at moderate static pressure. | Ducts are always fine; no need to check. |
| How do you decide system size in tons or BTU? | We explain tons and BTU using Manual J inputs, not just square footage. | We use 1 ton per 500 square feet as a rule of thumb. |
| What refrigerant does the system use, and is it compliant with current EPA rules? | We specify the refrigerant (R-454B or R-32 for new systems after the EPA A2L transition) and confirm it meets current code. | Refrigerant does not affect homeowners. |
| Are you a TECH Clean California enrolled contractor, and is the program currently funded for heat pump HVAC? | We verify current TECH Clean California program status (single-family Phase I has been fully reserved since November 2025) and explain whether it applies before signing. | TECH always pays out; assume the rebate is yours. |
| Does my household income make us eligible for HEEHRA, and what does that involve? | We confirm income eligibility (below 80 percent AMI or 80 to 150 percent AMI), explain pre-approval is required, and verify program status (Phase I single-family is currently fully reserved per CEC as of 2026-02-24). | HEEHRA covers everyone; you qualify automatically. |
| How does the SDAPCD Rule 69.5.1 emissions standard affect a natural-gas furnace or water-heater replacement on this house? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County, and the agency has companion rules covering small space heaters. This is an emissions limit on the unit you install, not a phase-out of gas. We document the rule citation and confirm any quoted gas appliance meets the listed NOx limit. We then walk you through whether a heat-pump path avoids the limit altogether. | SDAPCD rules don't affect homeowners, only contractors. |
| How do you size a heat pump for San Diego given the coastal-to-inland climate gradient (La Jolla mild marine layer vs East County inland heat)? | We run ACCA Manual J 8th Edition with the ASHRAE 99 percent heating design temperature for the SD weather station closest to the home (Lindbergh Field for coastal SD; El Cajon or Ramona for East County) and the cooling-load demand for the microclimate. Coastal homes have minimal cooling load; inland homes carry a real summer cooling load. We do not use a one-size assumption across the county; we share the Manual J output. | We use a 1-ton-per-500-square-feet rule of thumb. |
| Many older SD homes are Spanish-style stucco with single-pane windows. How do you account for that envelope when sizing the heat pump? | We use realistic ACH50 (air changes per hour at 50 Pa) assumptions for the construction era, not a tight new-build default, and adjust the Manual J infiltration inputs accordingly. We confirm window type (single-pane vs dual-pane retrofit) and roof or attic insulation level. Where it makes sense we recommend a blower-door test before final sizing. We do not pretend the envelope is tighter than it is; we share the Manual J inputs we used. | Older SD houses are basically the same as new construction for sizing. |
| What refrigerant does the system use, and how do the A2L safety requirements affect installation? | New residential systems use R-454B or R-32 (both mildly flammable A2L refrigerants). Indoor-unit charge limits set a minimum room volume; we measure the actual indoor location and confirm the manufacturer's listed indoor charge fits the room. If the room is too small, we propose either a different unit or relocating the indoor section. We document the refrigerant choice and the room-volume calculation in the proposal. | A2L safety rules don't matter for homeowners. |
| Where will the outdoor condenser go given typical SD lot sizes, neighbor property lines, and the City noise ordinance? | We propose a location that meets City of San Diego Noise Ordinance limits (50 dBA at the property line in residential zones during the daytime, lower at night) and the manufacturer's required service clearance and clear airflow. For tighter lots we sometimes recommend a side-yard or rear-yard pad with a sound blanket. We share the proposed location and the published decibel rating of the chosen unit in the quote. | Heat pumps are quiet enough; setbacks do not matter in SD. |
| Beyond Manual J, will you also do Manual S equipment selection and Manual D duct design? | Yes. Manual J gives us the load; Manual S matches a specific equipment model and capacity at the design conditions; Manual D sizes the ducts (or confirms existing duct adequacy) for the airflow the equipment needs. We share all three outputs. Skipping Manual S is the most common way contractors end up oversizing in mild SD coastal climates. | Manual J is enough; the other steps are for new construction only. |
| Should we go all-electric heat pump or dual-fuel (heat pump plus gas furnace backup) in SD's mild climate? | In SD the design temperature is mild enough (Lindbergh Field around 42-44F per ASHRAE) that a properly sized inverter heat pump can carry the load down to the coldest hours without backup. Dual-fuel typically does not make sense unless you are keeping a gas appliance for another reason. We share the modeled hours below balance point so the choice is honest, and we note that any future gas appliance you install in SD County still has to meet SDAPCD Rule 69.5.1 NOx limits. | Always keep the gas furnace as backup; heat pumps cannot heat in winter. |
| If we go all-electric, what is the backup-heat strategy at the SD design temperature? | We size the heat pump to carry the design-day load without strip heat. Where the manufacturer requires emergency heat for low-stage failure protection, we install a low-kW electric resistance element with a lock-out at outdoor temperatures above the balance point. We share the modeled hours of strip operation per year, which is typically near zero in coastal SD and a small handful in East County. | All electric heat pumps always need 10kW of strip backup. |
| We are in an East County hillside that the City Fire-Rescue map flags as a Very High Fire Hazard Severity Zone. Does the outdoor unit need anything special? | Most of the SD County hillsides sit in CAL FIRE WUI zones, and the City of San Diego adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC Chapter R327 / R337 sets ignition-resistant material and clearance requirements for structures and accessory equipment in WUI zones; defensible space rules require a clear zone around the outdoor unit. We confirm the WUI zone for the address before we route conduit or place the outdoor unit, and we document the setback in the permit. | WUI rules only apply to brand-new construction. |
| Coronado, Mission Beach, and La Jolla coastal homes get salt air off the ocean. How does that affect warranty terms for the outdoor section? | Manufacturers typically require a corrosion-resistant coil option or coating for coastal installs and may exclude warranty coverage of corrosion-related failures otherwise. We confirm the manufacturer's coastal-install spec, document the coating option in the proposal, and verify the warranty terms (parts, labor, and compressor) in writing. Skipping the coastal option is a recognizable shortcut on SD coastal jobs. | Salt air is not a real issue inside SD city limits. |
| What does commissioning at startup look like, and do I get a report? | Commissioning includes measured airflow at each register, static pressure across the indoor coil, refrigerant charge verified by superheat or subcooling per the manufacturer chart, and outdoor-unit ambient and refrigerant temperatures. We give you a one-page commissioning report with all measured values and the technician name. We do not consider the install complete without it. | Commissioning is a buzzword; the system runs, that is enough. |
| We are in El Cajon / Poway / Ramona. How do you size differently when the cooling load actually matters? | East County summer design temperatures can run 95-100F+, which is a real cooling load very different from coastal SD. We use the closest ASHRAE 1 percent cooling design value for the address and run the full Manual J cooling block. We size the heat pump to meet the cooling load without short-cycling, then verify it still meets the smaller heating load. We do not use coastal sizing assumptions inland. | All SD homes can use the same coastal sizing. |
Questions for water-heater contractors
| Question | Good response | Bad response |
|---|---|---|
| Where will the heat pump water heater go, and does the location have adequate air volume? | We assess garage and utility room candidates (heat pump water heaters need roughly 700 to 1000 cubic feet of conditioned air around the unit, or a ducted exhaust path), evaluate noise impact, and confirm clearance per the manufacturer's install manual. | Any closet works for a heat pump water heater. |
| How will you handle the condensate drain? | We route a gravity drain to an approved disposal location or use a condensate pump; we explain freeze risk and overflow safety per CPC, and itemize the work in the quote. | Condensate isn't really an issue. |
| How will you size the tank, 50, 65, or 80 gallons? | We size from household occupancy, peak-hour fixture demand (showers, dishwasher, clothes washer simultaneity), and recovery preferences. A typical 3-to-4-person household lands on a 65 or 80 gallon unit to compensate for slower heat pump recovery vs gas. | Match the gallons of whatever tank is there now. |
| What is the first-hour rating of the proposed unit, and is it sufficient for our peak demand? | We provide the manufacturer's first-hour rating (gallons delivered in the first hour of peak use) and compare it to your typical morning or evening peak demand. We may suggest a larger tank or a mixing valve strategy when the rating runs tight. | First-hour rating isn't really relevant. |
| What is the Uniform Energy Factor (UEF) of the proposed unit, and how does it affect rebate eligibility? | We document the UEF on the spec sheet (modern heat pump water heaters typically range 3.0 to 4.0+ UEF). Many rebates require UEF at or above a threshold (often 3.0) or a NEEA Advanced Water Heater Specification tier rating; we confirm the eligible tier before submitting. | UEF doesn't matter for rebates. |
| Will the install be ambient (drawing from the room) or ducted? | Ambient installs are simplest and cheapest in a garage or large utility room. Conditioned-space installs may need ducted intake or exhaust to avoid cooling the living space; ducting adds labor and material cost. We model the tradeoff in the quote. | Ducting is always required. |
| What operating modes does the unit support, and which one do you recommend by default? | Most modern units offer heat-pump-only (most efficient), hybrid (heat pump plus resistance backup on high demand), and resistance-only (emergency or cold-snap) modes. We recommend hybrid as a default and explain how mode choice changes runtime and operating cost. | Modes are a gimmick; leave it on resistance. |
| What is the manufacturer warranty on the tank, the heat pump compressor, and labor? | Most residential heat pump water heaters carry a 10-year tank warranty and a separate compressor warranty (often shorter). We provide the spec sheet and itemize our labor warranty separately so they aren't confused. | Lifetime warranty; no fine print. |
| If we are switching from gas, how will you decommission the gas line? | We cap and label the abandoned gas line per CPC, pressure-test or visually verify the cap, and remove the abandoned T&P discharge pipe if it conflicts with the new install. The work is itemized in the quote. | Just leave the old gas line where it is. |
| What is your post-install commissioning checklist? | Commissioning includes pressure testing the plumbing, verifying the T&P relief valve and discharge routing, confirming the condensate drain runs free, setting the default operating mode, and walking through the app and any user controls. | We turn it on and leave. |
| What is the expected recovery time after a high-demand event, like back-to-back showers? | In heat-pump-only mode, recovery is slower than gas (typically 2 to 3 hours to reheat a depleted tank). Hybrid mode shortens that. We explain mode tradeoffs and may recommend a larger tank or a mixing valve strategy when recovery is a concern. | Recovery is the same as gas; no tradeoff. |
| How does the SDAPCD Rule 69.5.1 NOx limit affect a gas water heater replacement vs an HPWH path? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County. The rule applies at replacement; it does not force a switch off gas, but it does limit which gas units can be installed. An HPWH avoids the NOx limit entirely. We document the rule citation and confirm any quoted gas unit meets the listed limit. We then walk you through the HPWH alternative. | SDAPCD rules don't matter for water heaters. |
| What is UEF and how does the NEEA Advanced Water Heater Specification (AWHS) tier affect rebate eligibility? | UEF (Uniform Energy Factor) is the FTC-required efficiency rating; modern HPWHs run UEF 3.0-4.0. TECH and HEEHRA rebates typically require the unit to meet the NEEA AWHS Tier 3 or Tier 4 spec, which is stricter than UEF alone. We confirm the chosen model is NEEA AWHS Tier 3 or higher before listing it for any rebate. We document the spec in the proposal. | All HPWHs are the same for rebates. |
| What gallon size is right for our SD household — 50, 65, or 80? | We size against household size, peak hot-water demand, and recovery rate of the HPWH. Rough guidance: 50 gallons for a 1-3 person household, 65 gallons for 3-4 people, 80 gallons for 4+ or households with high simultaneous demand (multiple showers, large soaking tub). HPWHs have lower recovery rates than gas, so for the same household a gas-to-HPWH swap often sizes up one tier. We share the first-hour rating and recovery numbers. | Just match the old tank size. |
| Should the HPWH go in the garage or in a conditioned-space utility room? | HPWHs need air volume to extract heat from. Manufacturer specs typically require 700-1000+ cubic feet of surrounding air for ambient-mode operation, or ducting if installed in a smaller space. Garage installs are common in SD (mild ambient temperature year-round, plenty of air volume); utility-room installs may need ducting to / from another space. We measure the room volume and confirm the manufacturer spec at the site visit. We do not install where the manufacturer requirements are not met. | It works anywhere; just plug it in. |
| What refrigerant does the HPWH use and does it matter? | Most HPWHs use R-134a (older), R-513A, or R-1234yf (lower GWP). Sanden and a few others use natural CO2 (R-744), which has near-zero GWP but higher install cost. The refrigerant choice mostly affects climate impact, not performance. We document the refrigerant in the proposal. | Refrigerant choice doesn't matter; they all work. |
| Rheem ProTerra, A.O. Smith Voltex AL, Bradford White AeroTherm, Stiebel Eltron Accelera 300, or Sanden CO2 for SD? | Rheem ProTerra (50 / 65 / 80 gallon, R-454B, NEEA AWHS Tier 3+) is the volume choice with broad SD installer familiarity. A.O. Smith Voltex AL is comparable, often slightly higher install cost. Bradford White AeroTherm is the local-plumber favorite. Stiebel Eltron Accelera 300 has a strong cold-climate spec (not particularly needed in SD). Sanden CO2 is the highest-efficiency option with a smaller installer base. We share a one-page comparison with first-hour rating, recovery, warranty, and price. | Rheem is the only option. |
| What is first-hour rating (FHR) and how do you use it for sizing? | FHR is the gallons of hot water the unit can deliver in the first hour starting from a full tank; it includes both stored hot water and the unit's recovery rate during that hour. We compare your household peak demand (number of simultaneous showers, dishwasher, washing machine) against the FHR of candidate units and pick the unit whose FHR meets or exceeds the modeled peak demand. We share the methodology. | FHR is marketing; just pick a 50-gallon. |
| How is recovery rate different from FHR and why does it matter for an HPWH? | Recovery rate is gallons per hour the unit can heat after the stored hot water is depleted; HPWH recovery rates run 15-25 GPH compared to gas at 40-60 GPH. The slower recovery is why HPWH sizing usually goes up one tier. If your household has back-to-back high-demand events (5 showers in 90 minutes), the recovery rate determines whether you run cold. We share the recovery curve. | Recovery does not matter on hybrid units. |
| How is the existing gas line decommissioned when we switch to an HPWH? | California Plumbing Code requires the gas line to be capped at the appliance with a listed cap and labeled as decommissioned. We document the cap location and the label text in the proposal. SDG&E does not require shutoff at the meter for a single appliance decommissioning. If you are planning further gas elimination later we coordinate the meter-side shutoff at the right phase. | Just disconnect it; no labeling needed. |
| What are the warranty terms on the HPWH? | Manufacturer warranties typically run 10 years on the tank, 6-10 years on parts (heat-pump components), and 1 year on labor. Install-labor warranty is separate and typically 1-2 years from us. We share the manufacturer warranty document and explain what voids each (manufacturer voids on non-licensed install; labor voids on tampering or non-permitted modifications). | The HPWH is covered forever. |
| What does commissioning include and how do you set up vacation / heat-pump-only modes? | Commissioning includes measured supply temperature at the unit, measured recovery rate during the first heat cycle, condensate-drain verification, and operating-mode setup. Modern HPWHs have heat-pump-only, hybrid, electric-only, and vacation modes; we set up the default for your usage (typically heat-pump-only or hybrid for SD's mild ambient temperatures) and walk you through changing it via the unit or the app. We give you a one-page commissioning report. | Commissioning is just turning it on. |
| How is the condensate drain routed in a typical SD garage or interior install? | HPWHs produce 5-15 gallons / day of condensate that must go to a code-approved drain (interior sanitary drain, exterior gravity drain, or condensate pump to a higher drain). California Plumbing Code requires a P-trap and air gap at the drain connection. SD garage installs typically have a nearby floor drain or laundry sink; we share the proposed route at the site visit and confirm it meets CPC. | Just drain it onto the garage floor; it evaporates. |
Questions for solar + battery installers
| Question | Good response | Bad response |
|---|---|---|
| How will you size the solar array for our future electric load (heat pump HVAC, EV, water heater)? | We model expected future usage including planned heat pump, EV miles, and water heater, then size the array to offset that load under NEM 3.0 export economics. | We size the system from last year's utility bill only. |
| How does NEM 3.0 change the economics versus older interconnections? | NEM 3.0 cut export compensation by ~75 percent versus NEM 2.0, which makes battery storage important for self-consumption. We model expected savings under NEM 3.0 specifically. | NEM 3.0 is the same as NEM 2.0 economically. |
| Is my roof suitable for solar, and what is its remaining lifetime? | We inspect the roof condition, slope, orientation, and shade pattern; we recommend roof replacement first if the roof is near end of life. | Any roof works. |
| Which panel and inverter brands do you recommend, and why? | We name the specific panel model (wattage, efficiency, temperature coefficient, degradation curve) and inverter brand (string vs microinverter), explain the tradeoffs for our roof, and provide the manufacturer datasheets. | We use whatever is cheapest in stock this month. |
| Will the array use string inverters, microinverters, or DC optimizers, and why? | We choose based on roof shading patterns and orientation: microinverters or optimizers for shaded or multi-orientation roofs, string inverters for unshaded uniform arrays. We explain the cost and monitoring tradeoff. | Microinverters are always best. |
| What does the shade analysis show for our roof across the year? | We run a shade analysis tool (HelioScope, Aurora, or similar) using a site survey and roof imagery, and we share the annual production estimate per panel with shade losses called out. | Shade is not significant. |
| Do you offer a production guarantee, and how is it enforced? | We offer an annual production guarantee in kWh based on the design model, and we explain the remediation path (true-up payment or system correction) if actual production falls below the threshold. | Production guarantees are a marketing gimmick. |
| What monitoring platform comes with the system, and are there subscription fees? | We name the monitoring platform (Enphase Enlighten, SolarEdge mySolarEdge, or similar), describe what data is visible per panel or per string, and disclose any optional or recurring fees. | Monitoring is included; do not worry about the details. |
| If we add a battery later, can we still apply for SGIP at that time? | Yes — SGIP applications are tied to the battery install, not the solar install. As of 2026, only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open to new applications, and that budget is fully reserved with new apps on a waitlist served via attrition; ratepayer-funded General Market / Equity / Equity Resiliency budgets are no longer accepting new applications. We verify current SGIP budget status at selfgenca.com when the battery is added and explain that pre-approval is required before equipment is delivered. | SGIP only counts if solar and battery are installed together. |
| Who handles the PG&E interconnection paperwork, and what is the typical timeline? | We submit the PG&E interconnection application on your behalf, file the city permits, and coordinate Permission to Operate (PTO). Typical PG&E PTO timelines range from 2 to 6 weeks after the city sign-off; we document the expected window in the quote. | Interconnection happens automatically. |
| What is your post-install commissioning checklist? | Commissioning includes verifying each panel reports correctly in the monitoring platform, checking inverter firmware, confirming production matches the design model on a clear day, and walking us through reading the monitoring app. | We turn it on and leave. |
| How will you confirm the roof structure supports the array? | We perform a structural assessment including rafter sizing, spacing, and condition; for older or unusual roofs we may engage a licensed structural engineer to provide a letter for the permit submittal. | Roofs always handle solar. |
| How will the array meet California fire-setback rules? | We design the array to meet the California Residential Code fire access pathway requirements: ridge setbacks, hip-to-eave pathways, and emergency egress clearances, and we document compliance in the permit submittal. | Fire setbacks are optional. |
| What ongoing maintenance does the system need? | Typical maintenance is light: annual visual inspection, occasional rinse if local dust or pollen reduces production, and inverter firmware updates pushed by the manufacturer. We explain the warranty implications of skipping recommended maintenance. | Solar is install-and-forget; no maintenance ever. |
| What warranties cover the panels, inverter, and labor? | Panels typically carry a 25 year product warranty plus a 25 year linear production warranty; inverters carry 10 to 12 years standard (extendable); we provide a 5 to 10 year labor warranty separately. We document what voids each. | Lifetime warranty on everything. |
| SD is known for some of the highest solar production in California. How do you model production for a specific SD address? | We use PVsyst or HelioScope with NREL TMY3 data for the nearest SD station (Lindbergh Field for coastal, Miramar or El Cajon for inland) and apply a small microclimate derate where coastal marine layer is significant (Mission Beach, La Jolla mornings can lose a few percent). Typical SD production runs 15-20 percent above SF for the same roof orientation. We do a 12-month model with monthly breakdown and share it. We do not promise specific kWh production; we provide a model. | SD always gets the same production everywhere. |
| How does NEM 3.0 (Net Billing Tariff) affect the export economics for a typical SD rooftop on SDG&E? | NEM 3.0 took effect April 15, 2023 for new SDG&E interconnections. Export compensation is roughly 75 percent lower than NEM 2.0 and varies hourly by the Avoided Cost Calculator (ACC) rates. A solar-only system with limited self-consumption performs poorly on payback. We model self-consumption with and without battery to show the difference. SDG&E charges a $132 interconnection request fee. We share the ACC export-price hourly schedule we used and the year-1 cost comparison. | NEM 3.0 is fine; you'll still net to zero on your bill. |
| Do you offer a production guarantee on the SD install? | We use Aurora, HelioScope, or PVsyst to produce a year-1 modeled kWh number for your specific roof, then offer a production guarantee at 90-95 percent of modeled output. If production falls below the guarantee in year one, the remedy is documented in the contract (typically a check for the kWh shortfall at the locked-in retail rate, or a system check-up at no charge). We do not call this a savings guarantee; that is a different claim. | We guarantee you will save 80 percent on your bill. |
| Microinverters (Enphase IQ8 series) or string inverter with optimizers (SolarEdge) for an SD roof? | We compare both based on your roof. Microinverters fit best where the roof has multiple orientations or shading from neighboring trees or chimneys. String + optimizers can be slightly cheaper on a single clean south-facing slope. We share the modeled production for both topologies. Battery-ready coupling differs: Enphase pairs with IQ Battery (AC-coupled); SolarEdge pairs with their own Energy Bank (DC-coupled) or AC-couples with most batteries. | Microinverters are always better; string is obsolete. |
| My SD home has a 25-year-old composition roof. Should I re-roof before solar? | If the roof has fewer than 10-12 years of remaining life we recommend re-roofing first, because removing and reinstalling a solar array later runs $2,000-$5,000 in labor depending on size. SD's mild climate is relatively kind to composition shingles, but the 25-year mark is the typical replacement point. We share the roof assessment in writing; if it is borderline we show the cost comparison of re-roof-now vs solar-now-plus-remove-reinstall-later. | Roof age does not matter; just install on top. |
| We have a Spanish-style clay tile roof. How does that change the structural and racking approach? | Clay or concrete tile roofs require tile-hook flashing, not standard composition lag-bolt flashing, and the installer has to either remove and reinstall the tile around each penetration or use a tile-replacement bracket. Tile racking adds material cost and labor. We document the rack type (e.g. Quick Mount PV Tile Replacement, IronRidge Tile Hook) and confirm the structural review accounts for the dead load of the tile. | Tile roofs use the same racking as composition. |
| We are in the East County foothills the City marked as a Very High Fire Hazard Severity Zone. How does that affect the array layout? | CRC R327 / R337 sets roof access pathway and ridge-clearance requirements for solar arrays in WUI zones. Typical requirements include a 36-inch wide pathway from eave to ridge, a 36-inch clearance to the ridge along the array, and an unobstructed pathway between arrays. The City of SD adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. We confirm the WUI zone for the address and document the setback dimensions in the permit drawings. | Fire setbacks only apply to commercial. |
| What are the warranty terms on panels, inverters, and the install labor? | Panel manufacturers typically offer a 25-year linear performance warranty and 12-25 year product warranty (varies by brand). Inverter warranties run 10-12 years (string) or 25 years (Enphase microinverters). Install-labor warranty is separate and typically 5-10 years. We share all three terms in writing and explain what voids each (manufacturer voids on non-authorized installer; labor voids on tampering or non-permitted modifications). | Everything is covered for life. |
| A neighbor's mature palm or eucalyptus shades part of our south-facing roof. What can we do? | We do a shading analysis using HelioScope or Aurora and model the array with the current shading. California Solar Rights Act (Public Resources Code 25980-25986) and the Solar Shade Control Act limit certain tree-shading effects on existing solar arrays, but the rules are nuanced and we do not advise on the legal side. We design the array to minimize shade impact (microinverters or string optimizers, panel layout) and document the modeled production loss. | Solar Rights Act lets you cut down any neighbor's tree. |
| How does dust and the salt air affect long-term production in SD? | SD's dry summers and seasonal Santa Ana wind events deposit dust on panels; coastal homes also get salt-air. We use a 3-5 percent annual soiling derate in the production model for typical SD addresses. Rainy seasons typically clean the panels naturally; we do not recommend paid washing services unless soiling visibly exceeds the model. For coastal homes we spec coastal-rated frames and clamps and document them in the proposal. | Soiling does not exist in SD; you do not need to clean panels. |
| What monitoring platform do you use and what does commissioning look like? | Common platforms are Enphase Enlighten (microinverter systems), SolarEdge mySolarEdge (string with optimizers), and Aurora or HelioScope for design-side modeling. Commissioning includes measured array Voc / Isc, inverter power output at startup, communication with the monitoring platform, and the SDG&E PTO submission. We give you a one-page commissioning report and the monitoring login. We do not consider the install complete until the monitoring shows production. | Monitoring is optional; just turn it on and walk away. |
| How do you handle NEC 690 PV installation and the NEC 705.12 120 percent rule on the panel interconnection? | NEC 690 governs PV-system wiring (conductor sizing, disconnect placement, rapid shutdown per 690.12). NEC 705.12 sets the 120 percent rule for combined inverter sources plus main breaker against the busbar rating; we verify the existing panel busbar rating, the main breaker, and the planned PV breaker against the calculation. If the busbar fails the calc we recommend a line-side tap, a sub-panel, or a main-breaker derate. We document the calc in the permit. | 705.12 is optional; the inspector never checks. |
| Which circuits will be backed up during an outage, and for how long? | We provide a backup-loads list (refrigerator, internet, lights, HVAC controls, well pump if any), estimate runtime in hours at typical and worst-case usage, and explain whether whole-home or essential-loads backup is recommended. | The battery powers the house. |
| Does my install qualify for SGIP (Self-Generation Incentive Program), and at what tier? | We verify current SGIP budget status before quoting: as of December 31, 2025 the ratepayer-funded General Market, Equity, and Equity Resiliency budgets are closed to new applications, and only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open — and that budget is fully reserved with new applications served via an attrition-based waitlist (selfgenca.com). We document the waitlist position rather than promising a rebate, and we explain that pre-approval is required before equipment is delivered. | SGIP always pays out the maximum amount. |
| What is the battery's usable kWh and continuous inverter power, and how do they relate? | We specify both: kWh determines how long the backup lasts; the inverter's continuous AC output determines what can run at once (refrigerator + lights + maybe HVAC vs everything). | kWh is the only number that matters. |
| Is the battery AC-coupled or DC-coupled with the solar array, and why? | AC-coupled batteries use a separate inverter and are easier to retrofit to existing solar. DC-coupled batteries share an inverter with new solar and are typically more efficient end-to-end. We choose based on whether the solar array is new or existing. | Coupling does not matter. |
| Can we add more battery capacity later, and what are the limits? | Most modern systems support stacking additional units up to a vendor-specified maximum. We document the maximum stack today, what is needed to add capacity later (matching firmware, software update, possible electrical re-work), and whether SGIP can be applied to expansion units. | Buy the biggest battery today; expansion is impossible. |
| What depth-of-discharge limit does the battery use, and how does that affect usable kWh? | We explain the nameplate kWh vs usable kWh: modern LFP batteries reserve very little for cycle life (often 95 to 100 percent of nameplate is usable); older chemistries reserve 10 to 20 percent. We quote usable kWh in the proposal so you can compare like-for-like. | Nameplate kWh is the usable kWh. |
| What is the manufacturer warranty on the battery, and what limits it? | Most residential batteries carry a 10 to 12 year warranty, often paired with a cycle count (e.g. 6,000 to 10,000 cycles) or throughput limit (e.g. 37.8 MWh) - whichever comes first. We provide the spec sheet and explain what voids coverage. | Lifetime warranty; no fine print. |
| Are time-of-use arbitrage cycles counted against the warranty? | Yes. Every charge-discharge cycle counts toward the throughput limit; aggressive daily TOU arbitrage may shorten the years-based warranty window. We model expected cycles per year for your usage pattern. | Cycling does not count against the warranty. |
| How will the battery shift load away from PG&E peak hours? | We program the battery to charge from solar during midday and discharge during the PG&E EV2-A or E-ELEC peak window (typically 4-9pm), saving you the peak-period delta. We tune the schedule for your actual usage and rate plan. | The battery charges and discharges whenever. |
| How does NEM 3.0 change the battery payback? | Under NEM 3.0, export compensation dropped by roughly 75 percent, so self-consumption (using your solar via the battery instead of exporting) is now the primary battery economic driver. We model expected savings under NEM 3.0 with your specific rate plan. | NEM 3.0 has no effect on battery payback. |
| How will the install meet CRC 1207 / R327 fire-setback rules for energy storage? | We design the install per California Residential Code R327 (formerly section 1207): separation from windows, doors, openings into the dwelling, and other batteries; smoke and heat detectors per code; and an exterior wall location where possible. We document compliance in the permit submittal. | Fire setbacks are optional. |
| What is your post-install commissioning checklist? | Commissioning includes verifying battery state-of-charge reporting, testing backup-mode transfer with a simulated outage, walking through the app for backup-only vs TOU modes, and confirming the SGIP system performance metering is functioning if SGIP is part of the project. | We turn it on and leave. |
| Are you an installer certified by the battery manufacturer? | Yes. We provide our certification number for the specific battery brand (Tesla Powerwall, Enphase IQ, LG Chem RESU, FranklinWH, etc.); certification is typically required to preserve full warranty coverage. | Certification does not matter for batteries. |
| Who handles the PG&E interconnection update for the new battery? | We submit the updated PG&E interconnection paperwork to add the battery to your existing or new solar interconnection, and we obtain the updated Permission to Operate before energizing. | PG&E interconnection happens automatically. |
| What panel-side breaker work or interconnection method does the battery require? | We confirm whether the battery interconnects via a back-fed breaker (with sum-of-breakers check per NEC 705.12), a supply-side tap, or a dedicated battery sub-panel; we show the calculation on the permit drawings. | Any spare slot will work. |
| How does SGIP apply for a residential battery in SDG&E territory and who administers it? | SGIP in SDG&E territory is administered by Center for Sustainable Energy (CSE, energycenter.org, sgipsd.org), not by SDG&E directly. Budget status as of 2026: per the program administrator, the ratepayer-funded Residential General (around $150 per kWh), Equity (around $850 per kWh), and Equity Resiliency (around $1,000 per kWh for high-fire-threat-district or low-income medical-baseline customers) budgets are no longer accepting new applications. Only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open — and that budget is fully reserved as of December 31, 2025; new applications go to a waitlist served through attrition of cancelled projects. RSSE rates were around $1,100 per kWh storage plus around $3,100 per kW solar, targeted at income-qualified solar-plus-battery customers. Pre-approval is required before installation; we verify current budget status at sgipsd.org and selfgenca.com before quoting, reserve through CSE when the path is open, and document the reservation number (or waitlist position) in the proposal. We confirm only what we have reserved; we do not assume eligibility. | You will receive SGIP for the whole battery cost. |
| How does the battery improve solar payback under NEM 3.0 in San Diego on SDG&E? | Under NEM 3.0, exporting to the grid pays roughly 75 percent less than under NEM 2.0. A battery stores midday solar for use during the 4-9pm peak window, which is the highest-rate window on SDG&E TOU-DR1 and EV-TOU-5. We model self-consumption ratio (typically 60-80 percent with battery vs 30-50 percent solar-only) and share the year-1 cost comparison. | Adding a battery always cuts your bill in half. |
| AC or DC coupling for the battery — and how does that interact with my existing SD solar inverter? | DC-coupled batteries (Tesla Powerwall 3 with integrated PV inverter, SolarEdge Energy Bank with SolarEdge inverter) share one inverter for solar and battery, which is more efficient and cheaper if you are installing solar and battery at once. AC-coupled batteries (Enphase IQ Battery, FranklinWH, LG Energy Solution RESU paired with a separate hybrid inverter) bolt onto an existing solar array. For a battery-only retrofit on existing solar AC-coupled is the path; for new combined solar plus battery either works and we model the cost difference. | AC vs DC does not matter at all. |
| What is on the backup-loads list for a typical SD home? | Common backup loads we size for include lights, refrigerator, freezer, internet router and modem, garage door opener, and at least one outlet circuit. SD does not have PG&E-style PSPS shutoffs, so battery backup runtime targets are typically a few hours of evening peak coverage plus occasional storm outages, not the 8-24 hour PSPS-driven sizing common in PG&E territory. For homes with medical equipment or remote work needs we add specific circuits. We share the list so you can edit before sign-off. | The battery runs your whole house automatically. |
| Should we install one battery or scale to two or three? | Typical SD residential sizing is one 10-15 kWh battery (Tesla Powerwall 3, Enphase IQ Battery 10, FranklinWH aPower 2) for evening peak-shifting; two units for whole-house backup; three units for off-grid-style resilience. We size against your backup-loads list (kWh per outage hour) and your TOU peak-window kWh. SGIP rebate scales by usable kWh, so a larger system pulls more rebate but the marginal payback diminishes after the second unit. | Always install three; bigger is always better. |
| Critical-loads panel or whole-house backup with an automatic transfer switch? | Critical-loads panel (a small sub-panel that holds only the backup circuits) is the simpler and cheaper path; whole-house backup uses a Tesla Gateway 3 or equivalent automatic transfer switch on the main, which costs more but transfers everything. The whole-house path needs careful load management to avoid tripping the battery's inverter output limit (typically 5-10 kW continuous per battery). We share both options with cost. | Whole-house is the only option. |
| What is depth of discharge (DoD) and how does it affect usable capacity? | LFP (lithium iron phosphate, the chemistry used in Tesla Powerwall 3, Enphase IQ Battery, and most current residential batteries) is rated for high DoD — typically 95-100 percent of nameplate kWh is usable. NMC chemistries had lower DoD (80-90 percent). We quote the usable kWh, not the nameplate, in the proposal. Cycle warranty assumes the battery is cycled within the rated DoD. | DoD is marketing; ignore it. |
| What does the battery warranty actually cover? | Battery warranties have three terms: years (typically 10), cycles (typically 4,000-10,000), and total throughput in MWh. The warranty pays out on whichever limit you hit first. We share the manufacturer warranty document and explain how daily cycling at the nameplate rating would deplete the throughput limit over the warranty years. Install-labor warranty is separate (typically 5-10 years). We do not call the install lifetime-protected; it is not. | Battery warranty covers everything forever. |
| How long will the battery actually run my SD home during an outage? | Runtime depends on the loaded circuits, the kWh available, and whether the sun is producing. For a 13.5 kWh battery powering a typical critical-loads panel (lights, fridge, internet, a few outlets) at around 1 kWh per hour, expect roughly 12 hours overnight, then solar refills during the day. We model the runtime against the specific loads-list and the time of year, and we share the model. We do not promise a single runtime number without inputs. | You will run for a week off the battery. |
| How do you handle NEC Article 706 (ESS) and the NEC 705.12 120 percent rule on the SD panel? | NEC 706 governs energy storage system wiring (conductor sizing, ventilation, signage). NEC 705.12 sets the 120 percent rule for combined inverter sources plus main breaker against the busbar rating; we verify the existing panel busbar rating, the main breaker, and the planned battery-inverter breaker against the calculation. If the busbar fails we recommend a line-side tap, a sub-panel, or a main-breaker derate. We document the calc in the permit. | 705.12 only matters for solar, not for batteries. |
| What UL listings should the battery have? | We confirm the battery is UL 9540 listed (system-level energy-storage safety) and the cells inside are UL 9540A tested (cell-level thermal-runaway propagation test). UL 9540A is what fire authorities cite when approving residential installs and is required by many AHJs including City of SD for outdoor and garage installs. We share the listing documents. | UL ratings do not matter at the residential level. |
| Tesla Powerwall 3, Enphase IQ Battery, or FranklinWH for SD? | Tesla Powerwall 3 has an integrated PV inverter (DC-coupled with optional AC), 11.5 kW continuous output, and a 13.5 kWh nameplate; works well as a combined new-install solar plus battery. Enphase IQ Battery (10 kWh or 5 kWh modules) AC-couples cleanly with Enphase microinverter solar; modular sizing. FranklinWH aPower 2 (15 kWh, 10 kW continuous) is AC-coupled with strong load-management features and works retrofit. We compare based on existing solar, sizing, and price; we share the comparison. | Tesla is the only option. |
| What does the monitoring look like day-to-day? | Tesla app, Enphase Enlighten, and FranklinWH app all show real-time power flow (solar, home, battery, grid), historical charts, and TOU schedule controls. We commission the app login during install, walk you through the backup-mode toggle and the TOU peak-shift schedule, and confirm communication with SDG&E AMI metering. We share login docs. | Monitoring is just a gimmick. |
| Any grounding considerations under NEC Article 250 for the ESS install? | NEC 250 grounding electrode requirements apply to the ESS the same way they apply to a service. We verify the existing grounding electrode system (rod or rebar-encased electrode), confirm the conductor size for the new ESS rating, and bond as required. For installs where the existing grounding is degraded (older SD homes sometimes have single-rod systems below current code) we upgrade per current NEC and document the work in the permit. | Grounding does not need to be touched for batteries. |
| We are in an East County WUI zone the City marked as a Very High Fire Hazard Severity Zone. Does the SGIP Equity Resiliency tier apply? | SGIP Equity Resiliency was designed for customers in high-fire-threat districts (per CPUC HFTD map) and on the Medical Baseline program, with significantly higher per-kWh incentives than General or Equity. Many East County and inland-SD addresses fall in HFTD Tier 2 or Tier 3. As of 2026 the ratepayer-funded Equity Resiliency budget is no longer accepting new applications — only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open, and that budget is fully reserved with new applications on a waitlist via attrition. We verify the HFTD designation against the CPUC fire-threat map and walk through eligibility honestly before listing any SGIP line item, but practical access in 2026 is limited to the RSSE waitlist for income-qualified solar-plus-battery projects. Approval is not automatic; we list any SGIP path as pending until confirmed via sgipsd.org / CSE. | Equity Resiliency is automatic in SD; you qualify. |
| What does battery commissioning look like at the end of the install? | Commissioning includes measured State of Charge after first charge cycle, inverter output verification at the panel, backup-loads cutover test (simulated grid outage), TOU schedule programming, app login confirmation, and SDG&E communication test. We give you a one-page commissioning report with measured values and the technician name. We do not consider the install complete without it. | Commissioning is a buzzword; the battery either works or it does not. |
Questions for electricians
| Question | Good response | Bad response |
|---|---|---|
| What is my panel size and service size, and is it adequate for adding a heat pump? | We inspect the panel labels and main breaker on site, explain whether 100A, 125A, 150A, or 200A is adequate, and verify the service drop matches the panel. | We guess from a photo only; no on-site inspection. |
| Can we avoid a service upgrade by using smart load management? | Possibly. We will perform a formal Article 220 load calculation, propose smart load management for HVAC + EV + water heater coordination, and explain the tradeoff vs upgrading. | You always need 200A; no calculation needed. |
| Will the heat pump need a new dedicated circuit, and what breaker size? | Yes, the outdoor unit and air handler each typically need dedicated circuits at the breaker sizes the manufacturer specifies (often 30-50A for outdoor, 15-30A for indoor). | Any spare breaker will work. |
| Does the install require a dedicated electrical circuit, and what size? | Standard heat pump water heaters typically need a dedicated 30A 240V circuit; some 120V hybrid models can operate on a 15A or 20A circuit at reduced capacity. We size the circuit per the manufacturer's data plate and document conductor gauge and breaker rating in the quote. | Share the circuit with the dishwasher. |
| Should the HPWH be 240V hardwired or a 120V plug-in hybrid (e.g. Rheem ProTerra Plug-In)? | Most HPWHs require a dedicated 240V / 30A circuit (10 AWG conductors, 30A breaker). The 120V plug-in hybrid models (Rheem ProTerra Plug-In, A.O. Smith Voltex AL with 120V option) run slower but use an existing 15A or 20A plug, which avoids panel work entirely. We compare the cost-and-time of running new 240V wire against the slower recovery rate of the 120V unit and share the choice. | 240V is the only option. |
| What charger amperage do you recommend, and why? | We size the charger based on your vehicle, expected daily mileage, panel capacity, and future second-EV plans (typically 32-48A continuous draw on a 40-60A circuit). | Always install the biggest charger; bigger is better. |
| Will the charger need a dedicated 240V circuit? | Yes. We run a dedicated 240V circuit sized at 125 percent of the charger's continuous draw, with the correct conductor gauge and conduit per code. | Share a circuit with the dryer. |
| How will you confirm my panel has capacity for the charger? | We perform an Article 220 load calculation on site, consider existing loads and planned heat pump or HVAC additions, and explain whether smart load management can avoid a service upgrade. | Your panel is fine; no calculation needed. |
| Can smart load management let me add a charger without upgrading the panel? | Often yes. Devices like Span panels or charger-side load-share modules may avoid a service upgrade by throttling the charger when other loads (HVAC, water heater) are active. | Load management is unreliable; always upgrade the panel. |
| How would you support a second EV without re-wiring everything later? | We may install a load-sharing charger today, or pre-pull conductors for a second circuit. We document the planned future load in the Article 220 calc. | One charger is plenty for any household. |
| How will you handle grounding and bonding for the new circuit? | We verify the service ground meets code, bond the charger neutral and equipment per Article 250, and confirm the GFCI protection (built in or required separately). | Grounding is standard; nothing to discuss. |
| Where will the conduit run, and what does it cost to extend? | We walk the routing on site (interior wall vs exterior, attic vs trench), specify conduit fill code requirements, and itemize incremental cost per linear foot. | Conduit routing is included; don't worry about it. |
| What labor warranty do you provide on the install, separate from the manufacturer warranty? | We provide a 1-2 year labor warranty on installation; the manufacturer warranty (typically 3-5 years on the charger) is separate. | Lifetime warranty on everything. |
| How do you size the dedicated circuit per NEC Article 625 for the EVSE? | NEC 625 classifies EV charging as a continuous load, which requires a circuit sized at 125 percent of the EVSE's rated continuous current. For a 48A EVSE that is a 60A circuit (60A breaker, conductors rated for 60A continuous including any derating). We document the EVSE rated current, the breaker size, and the conductor gauge in the proposal. | Just match the breaker to the charger's amp rating. |
| Will you do a full NEC Article 220 load calculation on the SD panel before quoting? | Yes. We tabulate current connected loads (range, dryer, water heater, HVAC, general lighting) per NEC 220 demand factors and add the EVSE as a continuous load at 125 percent. We then add planned future loads (HP HVAC, HPWH, induction, battery) if the homeowner is staging a whole-home plan. The calculation sheet goes into the proposal so you can verify it. | Most SD houses are fine; no load calc needed. |
| Which smart Level 2 chargers do you recommend for off-peak scheduling, and what is the brand tradeoff? | Common choices are Tesla Universal Wall Connector (NACS plus J1772 adapter, 48A), ChargePoint Home Flex (50A), Wallbox Pulsar Plus (40A), and the Emporia EVSE (48A) for budget. We compare based on connector type, max continuous amperage, WiFi reliability for off-peak scheduling against the SDG&E EV-TOU-5 super-off-peak window, OCPP support for utility demand-response, and install-warranty terms. We share the comparison so you can pick. | Brand does not matter; they are all the same. |
| My older La Jolla or North Park home has a 100A or 125A panel. Can load management avoid a panel upgrade? | Often yes. After the NEC 220 calc we look at smart load management options: a charger with built-in load management (DCC, Wallbox Pulsar Plus), a whole-home device (Span panel, Emporia Vue with load shed), or a dedicated EV load management device. We compare device cost plus install against the panel-upgrade cost and share both numbers. Older SD homes with subfeeds to detached garages sometimes still benefit from upgrading. | Always upgrade to 200A; that is the only path. |
| SD has Title 24 solar-mandate new homes pre-wired for solar, and I am thinking about adding solar later. How does that affect the EVSE install and the panel? | Future solar plus battery touches the same panel; NEC 705.12 sets a 120 percent rule for combined inverter sources plus main breaker against the busbar rating. We document the existing busbar rating now so the future PV install knows the headroom. Where the busbar is undersized we recommend a sub-panel or a smart panel as part of the EVSE work to avoid a second panel upgrade later. | Solar has nothing to do with EVSE installs; do not worry about it. |
| The panel is in the front of the house and the parking spot is at the back of a deep SD lot. How do you size for voltage drop? | We measure the actual conductor run length, apply NEC 210.19 informational note recommendations (under 3 percent voltage drop on branch circuits), and upsize the conductor gauge if needed. Long runs on a deep SD lot can push 6 AWG to 4 AWG. We document the calculated voltage drop and the conductor selection in the proposal. | Voltage drop is not real; copper is copper. |
| If the EVSE is in an outdoor or detached-garage location, what ground-fault protection is required? | Outdoor receptacles require GFCI protection per NEC 210.8; many EVSEs include internal CCID-20 ground-fault detection that conflicts with an upstream GFCI breaker (nuisance trips). For hardwired EVSEs we follow the manufacturer's install manual, which usually says no upstream GFCI. For NEMA 14-50 receptacles we use a GFCI breaker. We document the chosen approach and confirm it matches the EVSE manual. | GFCI is optional outdoors; the breaker does not matter. |
| Should the install be a NEMA 14-50 receptacle or hardwired EVSE? | NEMA 14-50 receptacles are convenient (charger is portable) but limit continuous current to 40A (50A breaker, 80 percent continuous). Hardwired allows 48A continuous (60A breaker) and avoids receptacle-failure risk under heavy continuous use, which has been a documented failure mode on residential 14-50s. For frequent charging at full 48A we recommend hardwired; for occasional charging the receptacle is fine. We document the recommendation and the basis. | Always use a NEMA 14-50; it is the standard. |
| Some EVSE brands require an authorized installer for the install warranty. Are you certified for the brand we are picking? | We share our manufacturer certifications (Tesla Approved Wall Connector Installer, ChargePoint Certified Installer, Wallbox Certified Installer, etc.) and confirm the chosen brand is on that list before signing. Using a non-certified installer can void the install warranty even if the equipment warranty is intact. | Manufacturer certifications do not matter. |
| If solar is in the future plan, should we oversize the conduit now during the EVSE install? | Often yes. Pulling spare conduit (or a larger conduit with a pull string) during the EVSE trench or wall chase avoids a second open-up later. The marginal cost during this install is small. We share the conduit-fill calculation per NEC Article 300 and Chapter 9 Table 1 and confirm the spare capacity meets future PV plus battery conductor sizes. | Spare conduit is wasted money. |
| Will the chosen charger support utility demand-response programs via WiFi or OCPP? | Most modern Level 2 chargers (Tesla, ChargePoint, Wallbox, Emporia) support WiFi-based off-peak scheduling, which is the practical match for the SDG&E EV-TOU-5 super-off-peak window. Open Charge Point Protocol (OCPP) support varies by brand and is required for some utility demand-response enrollments; ChargePoint and Wallbox have stronger OCPP coverage, Tesla supports its own ecosystem. We share which protocol the chosen charger uses and what utility programs accept it. | Smart features do not matter; just plug it in. |
| What is the separate warranty on the charger hardware vs the install labor? | Charger hardware typically comes with a 3-5 year manufacturer warranty (Tesla 4 years, ChargePoint 3 years, Wallbox 3 years). Our install labor warranty is separate (usually 1 year). We share both warranty terms in writing and explain what voids each (manufacturer voids on non-authorized installer; labor voids on tampering or non-permitted modifications). | Everything is covered forever. |
| We are in an East County hillside the City flagged as a Very High Fire Hazard Severity Zone. Does that affect how we route the EVSE conduit? | WUI zones in the City of SD adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC R327 / R337 sets ignition-resistant material and clearance standards for structures and accessory equipment in WUI zones; exterior conduit and any junction boxes must use listed materials and meet defensible-space clearances. We verify the WUI zone for the address before routing and document the materials choice in the permit. | WUI rules only apply to brand-new construction. |
| Will you perform an NEC Article 220 load calculation before sizing the new panel or service? | Yes. We total existing connected loads, apply Article 220 demand factors, then add expected future loads (heat pump HVAC, heat pump water heater, EV charger, induction range, battery) before recommending a service size. | We size from the existing panel rating. |
| Is this a service upgrade or a panel-only replacement, and how do you decide? | We explain the difference plainly: a service upgrade changes the service drop, meter, and main breaker rating (utility coordination required); a panel-only replacement swaps the breaker box at the existing service rating. We base the recommendation on the Article 220 result, not on a default upsell. | It is the same thing. |
| Who coordinates with the utility for the service upgrade, and what lead time should we expect? | We coordinate with the serving utility (your investor-owned utility such as PG&E, SCE, or SDG&E, or your municipal utility such as LADWP or SMUD) for the service drop, meter swap, and any utility-side work. We document the expected utility lead time in the quote because it often dominates the project schedule. | The utility handles itself. |
| How do you decide between 200A, 225A, or 320A service, and how much headroom should we plan for? | We size to the Article 220 calculated demand plus headroom for the ten-year horizon of electrification projects already on the table. For most California single-family homes adding heat pump HVAC, heat pump water heater, and one or two EVs, a properly sized 200A service is enough; 225A or 320A is only justified when the load calc shows it. | Bigger is always better, so we go 320A. |
| When does a smart panel (Span, Lumin, Eaton EV Choice) make sense versus a standard load center? | A smart panel can avoid a service upgrade when load shedding can keep peak demand under the existing service rating, or when granular per-circuit metering is desired. A standard load center is the right choice when the Article 220 result already fits the service rating, the homeowner does not want app-based controls, or budget is tight. | Smart panels are always the answer. |
| Is a sub-panel addition (for a detached garage, ADU, or workshop) a viable alternative to a full service upgrade? | A sub-panel can serve outbuilding loads without changing the main service rating when the Article 220 calc shows the existing service still has capacity. We size the sub-panel feeder per NEC and run it under permit. | Sub-panels always require a service upgrade. |
| Will you inspect and update the grounding electrode system as part of the panel work? | Yes. We verify the grounding electrode system (ground rods, water-pipe bond, concrete-encased electrode where present), measure resistance where required, and upgrade conductors and connections to the current code edition adopted by your jurisdiction. | Grounding is fine if the panel is bonded. |
| Which circuits in the new panel will require AFCI or GFCI protection, and what code edition are you applying? | We apply the California Electrical Code edition currently adopted by your local AHJ (the California Electrical Code is based on the NEC with California amendments). We itemize AFCI-required and GFCI-required circuits and price the AFCI/GFCI breakers separately so the homeowner sees the cost driver. | AFCI rules are confusing, so we skip them. |
| Will the quote include whole-home surge protection, and which type? | We recommend a Type 2 surge protective device (SPD) integrated with the new panel as a standard line item; Type 1 SPD at the service entrance is an upgrade option for homes with frequent utility-side transients. We explain warranty terms and replacement procedure after a major surge event. | Surge protection is unnecessary. |
| Does the existing panel location meet current code clearances, or do we need to relocate it? | We measure NEC Article 110 working-clearance requirements (depth in front of the panel, clear width, headroom) and confirm the panel is not behind cabinets, in clothes closets, or in other prohibited locations. If the location does not meet current code, we quote the relocation. | The existing spot is fine because the old panel fit. |
| Will you use conduit or NM cable for the new circuits, and how do you decide? | We follow the California Electrical Code wiring methods permitted for residential occupancies. Conduit is required for exterior runs and where physical damage is likely; NM cable is permitted in many concealed interior runs. We size conductors for the future load, not just today's circuit. | Whatever is easiest and cheapest. |
| Who pulls the electrical permit at the local AHJ (city or county permit center), and is the fee itemized in your quote? | We pull the electrical permit at the local AHJ in our own name, attend the inspection, and itemize the permit fee in the quote. We do not ask the homeowner to pull the permit. | We do not pull permits because they slow the job. |
| Walk us through the inspection process: which inspections are required and what does each one check? | We typically schedule a rough-in inspection (panel mounted, grounding electrode system verified, conductors run) and a final inspection (devices terminated, AFCI/GFCI verified under test, labeling complete). The exact sequence depends on the local AHJ. | There is just one inspection at the end. |
| How long will the home be without power during the panel swap, and what time of day will it occur? | A panel-only swap typically takes 6 to 10 hours; a service upgrade with meter swap can take a full day and is constrained by the utility's window. We confirm the exact window and time-of-day with the utility before scheduling. | Will not take long. |
| Will the new panel be sized and labeled for future solar or battery interconnection per NEC Article 705.12? | Yes. We size the busbar and main breaker so the future solar PV and battery interconnection meets NEC Article 705.12 (the 120% rule or supply-side connection, depending on the configuration). We document the headroom available so the future installer can verify quickly. | Solar and battery do not affect panel sizing. |
| If we may add a generator interlock or transfer switch later, what should the new panel design account for? | We can include a generator interlock kit with the panel install, or pre-wire space for a future automatic transfer switch. Interlock is the lowest-cost option for occasional backup; ATS is the right path for whole-home automatic backup. | Generator readiness is a future problem. |
| How are you treating the federal §25C tax credit for panel-upgrade work? | The federal §25C Energy Efficient Home Improvement Credit expired December 31, 2025 under OBBBA (PL 119-21). For panel work performed in 2026 and later, we do not list §25C as an applicable credit and we will not claim eligibility. | You qualify for the 30 percent federal tax credit on panel work. |
| Is panel-upgrade work eligible for HEEHRA (Home Electrification and Appliance Rebates) in California, and what is the current funding status? | Panel-upgrade work, sub-panel additions, and electrical wiring needed to support qualifying electrification projects can be eligible HEEHRA expenses for income-qualified households. CPUC reported HEEHRA funds fully reserved earlier this year, so we do not promise current availability and confirm against the CPUC HEEHRA portal at quote time. | HEEHRA covers all panel upgrades automatically. |
| Are there TECH Clean California, CCA (Community Choice Aggregator), or utility-side incentives that apply to this panel work? | TECH Clean California is statewide for qualifying heat-pump installations; panel-upgrade work tied to a qualifying heat pump may be eligible. Many CCAs (such as MCE, SVCE, CleanPowerSF, SJCE) and IOUs run their own electrification rebates with panel-work eligibility. We confirm the program rules in writing before the quote and list each program with its reservation status. | All rebates are guaranteed if you sign today. |
| What is the manufacturer warranty on the new panel, breakers, and any smart-panel hardware? | We list the manufacturer warranty for the panel and main breaker (typically 10 years), branch-circuit breakers (typically 1 to 10 years), and smart-panel hardware separately. We explain what voids each. | Warranty is whatever the box says. |
| What is your labor warranty on the panel installation, and does it cover related troubleshooting? | We offer a written labor warranty (typically 1 to 5 years) covering workmanship on terminations, conduit runs, and grounding work. We explain what is covered and what is not. | Our work is good, no warranty needed. |
| Based on the Article 220 result, what do you recommend as the best next action and why? | We propose a single recommended option with the load-calc rationale, list one alternative with the cost delta, and explain what would change our recommendation. We are clear about which costs are firm and which depend on the utility or AHJ. | Whatever you want is fine. |
General questions for every contractor
| Question | Good response | Bad response |
|---|---|---|
| Can you separate confirmed incentives from assumed incentives in the quote? | Yes. We mark each incentive as confirmed (with program ID and current reservation status) versus assumed (subject to verification before contract). | All listed incentives are yours. |
| Does the federal Section 25C tax credit apply to my installation? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for §25C. | You'll get the federal credit on your taxes. |
| Are BayREN Home+ rebates available for this installation? | BayREN Home+ may apply for Bay Area homeowners; we verify the program is currently funded and that the equipment qualifies before submitting. | BayREN always pays out automatically. |
| What is the equipment and labor warranty, and what voids it? | We provide the manufacturer warranty (typically 10 years parts when registered) plus our labor warranty (1-2 years standard); we explain what voids coverage including improper electrical, missing filters, and skipped annual service. | The warranty covers everything forever. |
| What is the best next step before signing a contract? | Schedule a site visit and Manual J load calculation, get a written quote with line-item pricing, verify all incentive reservation requirements, and confirm permit handling. | Sign today to lock in pricing before incentives expire. |
| Who pulls the mechanical and electrical permits with the City of San Diego Development Services Department and how is that visible to me? | We pull the mechanical permit through City of San Diego DSD (sandiego.gov/development-services, online via opendsd.sandiego.gov) under our contractor license, plus a separate electrical permit if the new circuit requires it. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 / 501 fee schedules. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | Permits add cost; most heat-pump swaps don't really need one. |
| How does San Diego Community Power's PowerOn default vs Power100 upgrade affect the carbon-accounting story of switching to a heat pump? | SDCP is the default CCA in most of the City of SD. The default PowerOn product is at least 50 percent renewable; Power100 is 100 percent renewable for an extra $0.01 per kWh. Switching from a gas furnace to an electric heat pump moves that combustion load onto your SDCP supply, so the carbon outcome depends on which product you are on. We do not promise a specific carbon number; we explain the product tiers and let you decide. The supplier-side rate (SDCP) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. | SDCP makes heat pumps automatically zero-carbon. |
| I read about BayREN heat-pump rebates online. Does any of that apply in San Diego? | BayREN is a nine-county Bay Area program; it does not cover San Diego County. The SD heat-pump-rebate landscape is sparser: TECH Clean California is the statewide path (reported fully reserved as of November 14, 2025; new reservations waitlisted), HEEHRA is the federal-funded path (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted), and SDG&E itself does not run a direct heat-pump HVAC rebate independent of TECH. We do not list a BayREN line item in SD quotes; we walk you through what is actually available. | BayREN applies statewide; you qualify for SD. |
| After we install the heat pump, which SDG&E rate plan are you recommending: TOU-DR1, TOU-DR2, or something else? | We model TOU-DR1 (the default residential plan with a 4-9pm summer peak and a 5-8pm winter peak) against TOU-DR2 (a flatter plan) using your most recent 12 months of usage. SDG&E's residential rates are among the highest in the country; the peak vs off-peak spread is wide. For a heat-pump household with little load shifting flexibility TOU-DR2 can win; for a household able to pre-cool or pre-heat off-peak, TOU-DR1 usually wins. We share the spreadsheet. | Everybody on a heat pump should switch to TOU-DR2. |
| Does the federal Section 25C tax credit apply to a 2026 heat-pump install in San Diego? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25C still applies in 2026; you will get 30 percent back on your taxes. |
| Can we get a HEEHRA rebate for a heat pump install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA covers every California homeowner; the rebate is yours. |
| What about TECH Clean California single-family heat-pump incentives? | TECH Clean California single-family heat-pump and HPWH incentives were reported fully reserved as of November 14, 2025 with no new reservations being accepted; the program is the state-level path SDG&E points homeowners toward for heat-pump rebates. We track reservation availability and disclose status in the quote. We do not list TECH as a confirmed rebate unless a reservation is already approved. | TECH always has funding; you will receive the rebate. |
| Does SDG&E offer any heat-pump financing I should consider over paying cash? | SDG&E has periodically offered on-bill financing for energy-efficient equipment; the specifics change. For a homeowner with cash on hand the cash-plus-confirmed-rebate path is usually cheaper because financing costs more than the rebate's time value. We model both with your numbers and share the math, including SDG&E's current rate-plan choice impact. | The SDG&E loan is free money; always take it. |
| Does HEEHRA currently offer a rebate for heat pump water heaters? | Heat pump water heaters are a HEEHRA-eligible category statewide; CPUC reservations for HEEHRA were fully subscribed as of February 2026. We verify current status at energy.ca.gov and may mark HEEHRA as assumed until a reservation is confirmed. | HEEHRA pays out automatically for every install. |
| Does the unit qualify for TECH Clean California, and what is the current status? | TECH Clean California covers qualifying heat pump water heaters statewide; we verify current scope, eligible model lists, and per-unit incentive amount at techcleanca.com before citing a number in the quote. | TECH covers every model on the market. |
| Does the BayREN Home+ program offer a rebate path for heat pump water heaters? | BayREN Home+ has historically offered a heat pump water heater rebate for Bay Area homeowners. We verify current program scope and rebate amount at bayrenhomes.org before submitting. | BayREN funds every Bay Area install at the same amount. |
| Does the federal Section 25C credit apply to the install? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Heat pump water heater installations completed in 2026 or later do not qualify for the §25C federal tax credit. | The federal credit applies as long as you install before tax day. |
| Who coordinates the plumber and electrician — your team or me? | We coordinate plumber and electrician scheduling under a single project lead, sequence the work so electrical and plumbing don't conflict, and present a unified quote with both trades line-itemed. | You hire and coordinate the electrician separately. |
| Will the quote separate confirmed incentives from assumed incentives? | Yes. Each incentive line shows program ID, reservation status (confirmed vs assumed), and a verify-by date. HEEHRA, TECH, BayREN, and SJCE EcoHome are commonly marked assumed until reservation is granted. | All listed incentives are yours. |
| What is the best next step before signing a heat pump water heater contract? | Get a written quote with line-item pricing covering model, capacity in gallons, first-hour rating, UEF, install location and ducting plan, dedicated electrical circuit, condensate drain plan, gas decommissioning (if applicable), SJPermits.org mechanical and electrical permit fees, and incentives separated into confirmed vs assumed with verify-by dates. | Sign today to lock in the incentive before it runs out. |
| Who pulls the mechanical and electrical permits with the City of San Diego DSD for a HPWH install? | We pull both a mechanical permit and an electrical permit through City of SD DSD (opendsd.sandiego.gov) under our contractor license. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 fee schedule. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | HPWHs don't need permits; just swap the tank. |
| I have read about BayREN HPWH rebates online. Does any of that apply in SD? | BayREN is a nine-county Bay Area program; it does not cover San Diego. For SD HPWH rebates the realistic paths are TECH Clean California (reported fully reserved as of November 14, 2025; new reservations waitlisted) and HEEHRA (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted). SDG&E does not run an independent HPWH rebate outside the TECH program. We do not list BayREN in SD quotes. | BayREN applies statewide; you qualify for SD. |
| Does SDCP have any HPWH-specific program or affect the HPWH operating cost story? | SDCP affects the supply side of your bill — PowerOn (50 percent renewable, default) or Power100 (100 percent renewable, $0.01/kWh premium) replaces SDG&E's generation portion. Switching from a gas water heater to an HPWH moves that load onto your SDCP supply, so the carbon story improves under Power100. SDCP has piloted residential electrification programs from time to time; we verify what is currently active on sdcommunitypower.org before listing it as savings. The TOU rate plan choice on SDG&E (TOU-DR1 or TOU-DR2) still determines the operating-cost math. | SDCP makes the HPWH free to run. |
| Can we get a HEEHRA rebate for an HPWH install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. The HPWH-specific category has been one of the more popular ones. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA pays the whole HPWH cost; you qualify automatically. |
| Does the federal Section 25C tax credit apply to a 2026 HPWH install in SD? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD HPWH install has it wrong; flag that as a red flag. | §25C still applies in 2026; you will receive 30 percent on your taxes. |
| Does the SDG&E rate plan choice (TOU-DR1 vs TOU-DR2) change the HPWH operating cost meaningfully? | Yes. HPWHs heat slowly; on TOU-DR1 (4-9pm peak in summer, 5-8pm winter) the unit can be scheduled to heat outside the peak window via the manufacturer app, cutting operating cost. On TOU-DR2 (flatter rates) scheduling has less impact. We model both plans against your household hot-water-use pattern and share the spreadsheet. The unit's electric-only mode draws much more than heat-pump-only; we schedule heat-pump-only by default. | Rate plan does not matter for water heaters. |
| What is the best next step before signing an SD HPWH contract? | Schedule a site visit, confirm the install location (garage or conditioned space) and electrical capacity (240V circuit available or 120V plug-in path), pre-check TECH and HEEHRA reservation status, and get a written quote with line-item pricing: HPWH unit, electrical work, plumbing work, condensate drain, SD DSD permits, commissioning. Compare two or three bids on the same scope and HPWH brand. | Sign today; the rebate will expire tomorrow. |
| Does the federal §30C credit for EV charging equipment apply to my install? | §30C federal EV-charger credit had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21). Installations permitted and operational before that date may have qualified in eligible census tracts (low-income community or non-urban) — verify with your contractor and tax preparer. Installations after June 30, 2026 do not qualify. | You will receive the federal credit on your taxes. |
| Are PG&E EV charger rebates currently available? | PG&E's residential EV charger rebate program changes periodically; we verify current funding and program rules with PG&E before submitting on your behalf. | PG&E always pays out. |
| Will the quote separate confirmed incentives from assumed incentives? | Yes. Each incentive is marked confirmed (with program ID and current funding status) or assumed (subject to verification before contract signing). | All listed incentives are yours. |
| What is the warranty on the charger hardware, and what voids it? | The manufacturer typically warrants the charger for 3-5 years; we note that physical damage, surge events without a whole-home surge protector, and tampering may void coverage. | Warranty covers everything forever. |
| What is the best next step before signing a contract? | Get a written quote with line-item pricing including conduit footage, panel-capacity verification, an Article 220 load calc, and a clear permit and inspection plan. | Sign today to lock in pricing. |
| Should I plan for bidirectional (vehicle-to-home) charging now or later? | We may explain that bidirectional charging requires a charger with V2H or V2G capability plus a compatible EV; we recommend pre-pulling extra conductors only if you have a specific vehicle target. | Bidirectional is mandatory; install it now. |
| Which SDG&E rate plan are you recommending after the charger install: EV-TOU-5, the legacy EV-TOU-2, or staying on TOU-DR1? | We compare three scenarios using your most recent 12 months of usage: EV-TOU-5 (the current EV rate, with super-off-peak overnight pricing and a 4-9pm peak), EV-TOU-2 (the legacy EV rate, still available to existing customers), and TOU-DR1 (the default residential plan with no EV-specific super-off-peak). The EV-TOU-5 super-off-peak window pays off only if you can charge overnight; if you charge during peak hours TOU-DR1 sometimes wins. We share the spreadsheet. | EV-TOU-5 is always the cheapest for EV owners. |
| What does the City of San Diego DSD electrical permit process look like for a 240V Level 2 EV charger? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov under our contractor license. Residential EV-charger circuits often qualify as simple no-plan electrical permits per Information Bulletin 103, which can be same-day for straightforward jobs. The application includes a load-calculation page, circuit specifications, AFCI / GFCI required by the currently adopted CEC edition, and the EVSE manufacturer cut sheet. Permit fee is itemized in the proposal. We share copies of all docs with you. | EV chargers don't need permits in San Diego. |
| Does the federal Section 30C EV charger credit apply to my install? The OBBBA changed the timeline. | §30C federal EV-charger credit had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21). The credit covered 30 percent of equipment plus installation up to $1,000 for residential, the property had to be placed in service by June 30, 2026, and the address had to be in an eligible (non-urban or low-income community) census tract. Installations permitted and operational before that date may have qualified — we confirm whether the SD property was in an eligible tract before listing the credit; many central City of SD addresses were not. Installations after June 30, 2026 do not qualify. | 30C is permanent; you will receive the credit on your taxes. |
| Does San Diego Community Power have an EV-specific program or bill credit I should know about? | SDCP is your default CCA in most of the City of SD. The supplier-side rate (PowerOn at 50 percent renewable, or Power100 at 100 percent for an extra $0.01/kWh) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. SDCP has piloted residential EV programs from time to time; we verify what is currently active on sdcommunitypower.org before listing it as savings. SDCP enrollment does not change the underlying SDG&E EV rate plan choice (EV-TOU-5 vs TOU-DR1). | Switching to SDCP makes EV charging free. |
| Does any local SD rebate program cover the EVSE install cost? | BayREN does not cover SD County. SDG&E has historically run periodic EV-charger or EV-circuit rebates and SDCP has piloted residential EV programs; both change from year to year. We verify on sdge.com and sdcommunitypower.org what is currently active for the SD market before listing any line item; if there is no currently funded rebate we do not invent one. We do list the federal §30C status (had a statutory cliff on June 30, 2026 per OBBBA Public Law 119-21; pre-cliff installs may have qualified in eligible census tracts; post-cliff installs do not qualify) and any active utility program. | BayREN covers EV chargers; you will get the rebate. |
| How are the City of SD DSD permit fees itemized in the quote? | We itemize plan check fee (if a plan is required), permit issuance fee, and inspection fee separately as a pass-through cost, not bundled into labor. We share the SD DSD fee schedule URL (Information Bulletin 103 or 501) and the application receipt. Total residential EV charger permit fees in SD typically land in the low-hundreds-of-dollars range; we document the actual figure once SD DSD quotes it. | Permits are included; do not ask about the breakdown. |
| If I live in a condo or apartment without garage parking, are there public-charging or shared-charging options to know about in SD? | SDG&E and SDCP both participate in CPUC-funded programs subsidizing multi-unit-dwelling and public Level 2 chargers; CSE (Center for Sustainable Energy) administers some of these for SDG&E territory. These are not direct private residential installs; we mention them so you know the alternatives if a private install at your address is not feasible. For private installs we focus on what your unit and HOA allow; for shared options we point you at PlugShare and the SDG&E + SDCP program pages to research current availability. | Condo owners cannot get any EV charging in SD. |
| Does the federal Section 25D residential clean energy credit apply to my installation? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for the 30 percent §25D credit. | You will receive the 30 percent federal credit on your taxes. |
| Does TECH Clean California currently offer a solar incentive? | TECH Clean California primarily targets heat pump HVAC and heat pump water heaters, not standalone solar. We verify current TECH program scope at techcleanca.com before citing any incentive. | TECH covers solar; assume the rebate applies. |
| Are BayREN Home+ rebates available for our solar or solar plus battery project? | BayREN Home+ is primarily a building shell and heat-pump program for Bay Area homeowners; we verify whether a solar or battery incentive is currently active at bayren.org and explain the application path if so. | BayREN always pays out for solar. |
| What is the best next step before signing a solar contract? | Get a written quote with line-item pricing including the design model output (kWh per year), shade analysis, panel and inverter make and model, permit and PG&E interconnection fees, production guarantee terms, and warranty terms. | Sign today to lock in pricing before incentives change. |
| How do solar permits work with the City of San Diego DSD? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov plus a structural review if required. SD DSD has been an active SolarAPP+ participant for streamlined permitting on standard residential rooftop designs; we use SolarAPP+ when eligible. PTO (permission to operate) from SDG&E typically takes 2-6 weeks after final inspection. We share all permit applications and inspection cards. Same-day issuance is common for SolarAPP+-eligible designs. | Solar permits are universal same-day in SD. |
| Does the federal Section 25D residential clean-energy credit apply to a 2026 SD solar install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25D federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25D still applies in 2026; you will receive 30 percent on your taxes. |
| I bought a newer SD home that was built under the Title 24 Solar Mandate but has no panels. How does that affect a retrofit? | California's Title 24 Solar Mandate applies to new construction permits filed after January 1, 2020; many newer SD homes are pre-wired for solar even if no panels were installed. We confirm whether the home has a dedicated solar-ready conduit run from roof to main panel and whether a 200A panel was pre-installed; both shorten the install. For homes outside the mandate (built before 2020) we follow standard retrofit conduit and panel-side-work. | All California homes are Title 24 ready. |
| How does the SDG&E interconnection process work and what is the timeline? | We submit the SDG&E NEM application after install with the inverter cut sheet, single-line diagram, electrical-permit final card, and the $132 interconnection-request fee. SDG&E reviews and issues PTO; typical timeline runs 2-6 weeks but has occasionally stretched longer. The Net Billing Tariff agreement is then activated. We do not let you turn the system on before PTO; doing so risks losing the agreement and incurring penalties. | Turn the system on as soon as the panels are mounted; PTO is a formality. |
| I am planning HP HVAC, HPWH, and an EV charger later. Should you size the solar for current usage or future load? | We size for the future modeled load, not the past 12 months. We work with your stated electrification plan (HP HVAC + HPWH + EV charger + future battery) and run a Manual J for HVAC plus a load-aggregation table for the rest. NEM 3.0 economics favor self-consumption, so the array size is tied to the future consumption pattern not the past. We share the future-load assumption sheet. | We size from last year's bill only. |
| I have read about BayREN solar incentives. Does any of that apply in SD? | BayREN is a nine-county Bay Area program; it does not cover San Diego. The SD solar-incentive landscape is now primarily federal-less (§25D expired Dec 31 2025) and SGIP for storage administered by CSE. We do not list BayREN in SD quotes. We list confirmed line items only: SDG&E PTO + NEM 3.0 agreement, SGIP for any battery, any active SDCP program at the time of contract. | BayREN applies statewide; you qualify for SD. |
| Does enrolling in SDCP Power100 instead of the default PowerOn change the solar economics? | Slightly. Power100 adds about $0.01 per kWh to the supplier side of your bill, which is a real cost that shows up before the solar offset. The solar array itself does not care which SDCP product you are on; what changes is the cost of the grid kWh you import (slightly higher under Power100). We share the modeled bill on PowerOn vs Power100 with and without solar so you can decide. | Power100 is required for solar. |
| What is the best next step before signing an SD solar contract? | Schedule the site visit, get the PVsyst or HelioScope production model with neighborhood-microclimate derate, confirm SolarAPP+ eligibility through SD DSD, decide on the NEM 3.0 self-consumption strategy (solar-only vs solar plus battery with SGIP), and get a written quote with all line items: panels, inverter, racking, labor, permits, structural review, monitoring. Compare two or three bids on the same scope. | Sign today; the prices are going up. |
| Does the federal Section 25D residential clean energy credit apply to my battery install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Battery installations completed in 2026 or later do not qualify for the 30 percent §25D credit. | You will receive the 30 percent federal credit on your taxes. |
| Does HEEHRA or TECH Clean California currently offer a battery incentive? | Neither HEEHRA nor TECH primarily fund residential batteries; SGIP is the main California battery program. We verify current TECH scope at techcleanca.com and HEEHRA status at energy.ca.gov before citing any battery incentive. | HEEHRA covers batteries automatically. |
| Will the quote separate confirmed SGIP incentives from assumed? | Yes. SGIP is marked confirmed only after pre-approval is granted and the funding tier is reserved; we mark the line as assumed in the quote until then and explain the reservation status. | All listed incentives are yours. |
| What is the best next step before signing a battery contract? | Get a written quote with line-item pricing including usable kWh, continuous AC inverter output, AC vs DC coupling, manufacturer warranty terms (years AND cycles AND throughput), labor warranty separately, SJPermits.org permit fees, PG&E interconnection plan, and an honest SGIP workflow: as of December 31, 2025 only the AB 209-funded RSSE budget accepts new applications and it is fully reserved (attrition-based waitlist via selfgenca.com), so the proposal documents the waitlist position rather than promising a rebate. | Sign today to lock in SGIP before funding runs out. |
| What does the City of San Diego DSD permit process look like for a battery install? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov. For wall-mounted batteries we also confirm structural attachment per the manufacturer install manual. Fire setback follows CRC R327 / R337; we document the setback measurements in the permit. Final card sign-off happens at inspection. We share all permit copies. | Batteries don't need permits in SD for under 20 kWh. |
| Does the federal Section 25D credit apply to a 2026 SD battery install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25D federal credit for a 2026 SD battery install has it wrong; flag that as a red flag. SGIP via CSE remains the primary California incentive for storage. | §25D still applies; you will receive 30 percent on your taxes. |
| How does the SDG&E interconnection process work for a battery alongside or after solar? | Battery interconnection on SDG&E follows the NEM 3.0 Net Billing Tariff agreement. For a battery added to existing solar we submit an amended interconnection application; for a combined new solar plus battery the agreement is part of the original NEM 3.0 application. SDG&E charges a $132 interconnection request fee. Typical timeline runs 2-6 weeks. We do not let you operate the battery in export mode before PTO; doing so risks losing the agreement. | Just turn it on; SDG&E does not check. |
| What is the best next step before signing an SD battery contract? | Schedule a site visit, verify SGIP budget status with CSE on sgipsd.org / selfgenca.com (as of December 31, 2025 only the AB 209-funded RSSE budget accepts new applications and it is fully reserved — new apps go to an attrition-based waitlist; we document the waitlist position rather than promising a rebate), decide on the backup-loads list and battery sizing, run the NEM 3.0 self-consumption model on your SDG&E rate plan, and get a written quote with line-item pricing: battery hardware, inverter, gateway, installation labor, SD DSD permits, structural attachment if wall-mounted, monitoring setup. Compare two or three bids on the same scope and battery brand. | Sign today; SGIP funding will run out tomorrow. |
Good vs reasonable vs bad answers
| Question | Good | Reasonable | Bad |
|---|---|---|---|
| Will you perform a Manual J load calculation before sizing the heat pump? | Yes. We calculate heating and cooling load based on home size, insulation, windows, orientation, ductwork, and infiltration. | We will run Manual J after a site visit and duct inspection. | We just replace the existing furnace with the same tonnage system. |
| Will you inspect ducts before specifying the heat pump? | Yes. We inspect duct size, leakage rate, return air paths, and airflow because heat pumps need good airflow at moderate static pressure. | We inspect ducts during install and modify if airflow targets are not met. | Ducts are always fine; no need to check. |
| How do you decide system size in tons or BTU? | We explain tons and BTU using Manual J inputs, not just square footage. | — | We use 1 ton per 500 square feet as a rule of thumb. |
| What refrigerant does the system use, and is it compliant with current EPA rules? | We specify the refrigerant (R-454B or R-32 for new systems after the EPA A2L transition) and confirm it meets current code. | — | Refrigerant does not affect homeowners. |
| Are you a TECH Clean California enrolled contractor, and is the program currently funded for heat pump HVAC? | We verify current TECH Clean California program status (single-family Phase I has been fully reserved since November 2025) and explain whether it applies before signing. | — | TECH always pays out; assume the rebate is yours. |
| Does my household income make us eligible for HEEHRA, and what does that involve? | We confirm income eligibility (below 80 percent AMI or 80 to 150 percent AMI), explain pre-approval is required, and verify program status (Phase I single-family is currently fully reserved per CEC as of 2026-02-24). | HEEHRA may apply if eligibility is verified after a site visit and income documentation. | HEEHRA covers everyone; you qualify automatically. |
| What is my panel size and service size, and is it adequate for adding a heat pump? | We inspect the panel labels and main breaker on site, explain whether 100A, 125A, 150A, or 200A is adequate, and verify the service drop matches the panel. | — | We guess from a photo only; no on-site inspection. |
| Can we avoid a service upgrade by using smart load management? | Possibly. We will perform a formal Article 220 load calculation, propose smart load management for HVAC + EV + water heater coordination, and explain the tradeoff vs upgrading. | We need to see your panel labels and load history before recommending. | You always need 200A; no calculation needed. |
| Will the heat pump need a new dedicated circuit, and what breaker size? | Yes, the outdoor unit and air handler each typically need dedicated circuits at the breaker sizes the manufacturer specifies (often 30-50A for outdoor, 15-30A for indoor). | — | Any spare breaker will work. |
| Can you separate confirmed incentives from assumed incentives in the quote? | Yes. We mark each incentive as confirmed (with program ID and current reservation status) versus assumed (subject to verification before contract). | — | All listed incentives are yours. |
| Does the federal Section 25C tax credit apply to my installation? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for §25C. | — | You'll get the federal credit on your taxes. |
| Are BayREN Home+ rebates available for this installation? | BayREN Home+ may apply for Bay Area homeowners; we verify the program is currently funded and that the equipment qualifies before submitting. | — | BayREN always pays out automatically. |
| What is the equipment and labor warranty, and what voids it? | We provide the manufacturer warranty (typically 10 years parts when registered) plus our labor warranty (1-2 years standard); we explain what voids coverage including improper electrical, missing filters, and skipped annual service. | — | The warranty covers everything forever. |
| What is the best next step before signing a contract? | Schedule a site visit and Manual J load calculation, get a written quote with line-item pricing, verify all incentive reservation requirements, and confirm permit handling. | — | Sign today to lock in pricing before incentives expire. |
| How does the SDAPCD Rule 69.5.1 emissions standard affect a natural-gas furnace or water-heater replacement on this house? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County, and the agency has companion rules covering small space heaters. This is an emissions limit on the unit you install, not a phase-out of gas. We document the rule citation and confirm any quoted gas appliance meets the listed NOx limit. We then walk you through whether a heat-pump path avoids the limit altogether. | We confirm the SDAPCD 69.5.1 NOx limit on any gas-appliance replacement before quoting; heat-pump replacements sidestep the rule. | SDAPCD rules don't affect homeowners, only contractors. |
| How do you size a heat pump for San Diego given the coastal-to-inland climate gradient (La Jolla mild marine layer vs East County inland heat)? | We run ACCA Manual J 8th Edition with the ASHRAE 99 percent heating design temperature for the SD weather station closest to the home (Lindbergh Field for coastal SD; El Cajon or Ramona for East County) and the cooling-load demand for the microclimate. Coastal homes have minimal cooling load; inland homes carry a real summer cooling load. We do not use a one-size assumption across the county; we share the Manual J output. | We run Manual J after the site visit; East County inland sizing usually lands larger than coastal SD for the same square footage. | We use a 1-ton-per-500-square-feet rule of thumb. |
| Who pulls the mechanical and electrical permits with the City of San Diego Development Services Department and how is that visible to me? | We pull the mechanical permit through City of San Diego DSD (sandiego.gov/development-services, online via opendsd.sandiego.gov) under our contractor license, plus a separate electrical permit if the new circuit requires it. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 / 501 fee schedules. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | We pull permits through SD DSD; we share the application copies once submitted. | Permits add cost; most heat-pump swaps don't really need one. |
| How does San Diego Community Power's PowerOn default vs Power100 upgrade affect the carbon-accounting story of switching to a heat pump? | SDCP is the default CCA in most of the City of SD. The default PowerOn product is at least 50 percent renewable; Power100 is 100 percent renewable for an extra $0.01 per kWh. Switching from a gas furnace to an electric heat pump moves that combustion load onto your SDCP supply, so the carbon outcome depends on which product you are on. We do not promise a specific carbon number; we explain the product tiers and let you decide. The supplier-side rate (SDCP) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. | If carbon accounting matters to you, Power100 is the simplest path; it is a customer-initiated upgrade on sdcommunitypower.org. | SDCP makes heat pumps automatically zero-carbon. |
| I read about BayREN heat-pump rebates online. Does any of that apply in San Diego? | BayREN is a nine-county Bay Area program; it does not cover San Diego County. The SD heat-pump-rebate landscape is sparser: TECH Clean California is the statewide path (reported fully reserved as of November 14, 2025; new reservations waitlisted), HEEHRA is the federal-funded path (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted), and SDG&E itself does not run a direct heat-pump HVAC rebate independent of TECH. We do not list a BayREN line item in SD quotes; we walk you through what is actually available. | BayREN does not cover SD; TECH and HEEHRA are the realistic paths and both are currently waitlisted. | BayREN applies statewide; you qualify for SD. |
| After we install the heat pump, which SDG&E rate plan are you recommending: TOU-DR1, TOU-DR2, or something else? | We model TOU-DR1 (the default residential plan with a 4-9pm summer peak and a 5-8pm winter peak) against TOU-DR2 (a flatter plan) using your most recent 12 months of usage. SDG&E's residential rates are among the highest in the country; the peak vs off-peak spread is wide. For a heat-pump household with little load shifting flexibility TOU-DR2 can win; for a household able to pre-cool or pre-heat off-peak, TOU-DR1 usually wins. We share the spreadsheet. | We model both before you commit; many SD heat-pump households land on TOU-DR1, but the answer depends on your shifting behavior. | Everybody on a heat pump should switch to TOU-DR2. |
| Many older SD homes are Spanish-style stucco with single-pane windows. How do you account for that envelope when sizing the heat pump? | We use realistic ACH50 (air changes per hour at 50 Pa) assumptions for the construction era, not a tight new-build default, and adjust the Manual J infiltration inputs accordingly. We confirm window type (single-pane vs dual-pane retrofit) and roof or attic insulation level. Where it makes sense we recommend a blower-door test before final sizing. We do not pretend the envelope is tighter than it is; we share the Manual J inputs we used. | We use era-typical infiltration assumptions; a blower-door test is optional but it tightens the Manual J output. | Older SD houses are basically the same as new construction for sizing. |
| What refrigerant does the system use, and how do the A2L safety requirements affect installation? | New residential systems use R-454B or R-32 (both mildly flammable A2L refrigerants). Indoor-unit charge limits set a minimum room volume; we measure the actual indoor location and confirm the manufacturer's listed indoor charge fits the room. If the room is too small, we propose either a different unit or relocating the indoor section. We document the refrigerant choice and the room-volume calculation in the proposal. | We confirm A2L room-volume limits at the site visit; older SD garages and utility rooms sometimes need the indoor section relocated. | A2L safety rules don't matter for homeowners. |
| Where will the outdoor condenser go given typical SD lot sizes, neighbor property lines, and the City noise ordinance? | We propose a location that meets City of San Diego Noise Ordinance limits (50 dBA at the property line in residential zones during the daytime, lower at night) and the manufacturer's required service clearance and clear airflow. For tighter lots we sometimes recommend a side-yard or rear-yard pad with a sound blanket. We share the proposed location and the published decibel rating of the chosen unit in the quote. | We walk the lot at the site visit and propose two locations with the decibel rating noted. | Heat pumps are quiet enough; setbacks do not matter in SD. |
| Beyond Manual J, will you also do Manual S equipment selection and Manual D duct design? | Yes. Manual J gives us the load; Manual S matches a specific equipment model and capacity at the design conditions; Manual D sizes the ducts (or confirms existing duct adequacy) for the airflow the equipment needs. We share all three outputs. Skipping Manual S is the most common way contractors end up oversizing in mild SD coastal climates. | We always do Manual J and Manual S; Manual D is required when we touch ductwork. | Manual J is enough; the other steps are for new construction only. |
| Should we go all-electric heat pump or dual-fuel (heat pump plus gas furnace backup) in SD's mild climate? | In SD the design temperature is mild enough (Lindbergh Field around 42-44F per ASHRAE) that a properly sized inverter heat pump can carry the load down to the coldest hours without backup. Dual-fuel typically does not make sense unless you are keeping a gas appliance for another reason. We share the modeled hours below balance point so the choice is honest, and we note that any future gas appliance you install in SD County still has to meet SDAPCD Rule 69.5.1 NOx limits. | All-electric is the more common SD outcome; we model both before you decide. | Always keep the gas furnace as backup; heat pumps cannot heat in winter. |
| If we go all-electric, what is the backup-heat strategy at the SD design temperature? | We size the heat pump to carry the design-day load without strip heat. Where the manufacturer requires emergency heat for low-stage failure protection, we install a low-kW electric resistance element with a lock-out at outdoor temperatures above the balance point. We share the modeled hours of strip operation per year, which is typically near zero in coastal SD and a small handful in East County. | Backup heat is small in SD; we spec it from the Manual J output. | All electric heat pumps always need 10kW of strip backup. |
| We are in an East County hillside that the City Fire-Rescue map flags as a Very High Fire Hazard Severity Zone. Does the outdoor unit need anything special? | Most of the SD County hillsides sit in CAL FIRE WUI zones, and the City of San Diego adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC Chapter R327 / R337 sets ignition-resistant material and clearance requirements for structures and accessory equipment in WUI zones; defensible space rules require a clear zone around the outdoor unit. We confirm the WUI zone for the address before we route conduit or place the outdoor unit, and we document the setback in the permit. | WUI status changes the placement plan; we verify the zone before quoting and document the setback. | WUI rules only apply to brand-new construction. |
| Coronado, Mission Beach, and La Jolla coastal homes get salt air off the ocean. How does that affect warranty terms for the outdoor section? | Manufacturers typically require a corrosion-resistant coil option or coating for coastal installs and may exclude warranty coverage of corrosion-related failures otherwise. We confirm the manufacturer's coastal-install spec, document the coating option in the proposal, and verify the warranty terms (parts, labor, and compressor) in writing. Skipping the coastal option is a recognizable shortcut on SD coastal jobs. | We spec the coastal corrosion package for Coronado / Mission Beach / La Jolla installs; warranty terms are documented in writing. | Salt air is not a real issue inside SD city limits. |
| What does commissioning at startup look like, and do I get a report? | Commissioning includes measured airflow at each register, static pressure across the indoor coil, refrigerant charge verified by superheat or subcooling per the manufacturer chart, and outdoor-unit ambient and refrigerant temperatures. We give you a one-page commissioning report with all measured values and the technician name. We do not consider the install complete without it. | We do a startup checklist and share the measured values; full Manual D static-pressure verification is included on ducted retrofits. | Commissioning is a buzzword; the system runs, that is enough. |
| Does the federal Section 25C tax credit apply to a 2026 heat-pump install in San Diego? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25C does not apply to 2026 installs; TECH (waitlisted) and HEEHRA (waitlisted) are the state-level paths still on the table. | §25C still applies in 2026; you will get 30 percent back on your taxes. |
| Can we get a HEEHRA rebate for a heat pump install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA is waitlisted; we document the reservation status and do not assume it as confirmed savings. | HEEHRA covers every California homeowner; the rebate is yours. |
| What about TECH Clean California single-family heat-pump incentives? | TECH Clean California single-family heat-pump and HPWH incentives were reported fully reserved as of November 14, 2025 with no new reservations being accepted; the program is the state-level path SDG&E points homeowners toward for heat-pump rebates. We track reservation availability and disclose status in the quote. We do not list TECH as a confirmed rebate unless a reservation is already approved. | TECH is paused for new reservations; we document the status and do not assume it as confirmed savings. | TECH always has funding; you will receive the rebate. |
| We are in El Cajon / Poway / Ramona. How do you size differently when the cooling load actually matters? | East County summer design temperatures can run 95-100F+, which is a real cooling load very different from coastal SD. We use the closest ASHRAE 1 percent cooling design value for the address and run the full Manual J cooling block. We size the heat pump to meet the cooling load without short-cycling, then verify it still meets the smaller heating load. We do not use coastal sizing assumptions inland. | We size from the inland design conditions for East County addresses; coastal assumptions do not apply. | All SD homes can use the same coastal sizing. |
| Does SDG&E offer any heat-pump financing I should consider over paying cash? | SDG&E has periodically offered on-bill financing for energy-efficient equipment; the specifics change. For a homeowner with cash on hand the cash-plus-confirmed-rebate path is usually cheaper because financing costs more than the rebate's time value. We model both with your numbers and share the math, including SDG&E's current rate-plan choice impact. | Most homeowners with cash are better off paying directly and stacking confirmed rebates; we model both before you decide. | The SDG&E loan is free money; always take it. |
| Where will the heat pump water heater go, and does the location have adequate air volume? | We assess garage and utility room candidates (heat pump water heaters need roughly 700 to 1000 cubic feet of conditioned air around the unit, or a ducted exhaust path), evaluate noise impact, and confirm clearance per the manufacturer's install manual. | — | Any closet works for a heat pump water heater. |
| How will you handle the condensate drain? | We route a gravity drain to an approved disposal location or use a condensate pump; we explain freeze risk and overflow safety per CPC, and itemize the work in the quote. | — | Condensate isn't really an issue. |
| Does the install require a dedicated electrical circuit, and what size? | Standard heat pump water heaters typically need a dedicated 30A 240V circuit; some 120V hybrid models can operate on a 15A or 20A circuit at reduced capacity. We size the circuit per the manufacturer's data plate and document conductor gauge and breaker rating in the quote. | — | Share the circuit with the dishwasher. |
| How will you size the tank, 50, 65, or 80 gallons? | We size from household occupancy, peak-hour fixture demand (showers, dishwasher, clothes washer simultaneity), and recovery preferences. A typical 3-to-4-person household lands on a 65 or 80 gallon unit to compensate for slower heat pump recovery vs gas. | — | Match the gallons of whatever tank is there now. |
| What is the first-hour rating of the proposed unit, and is it sufficient for our peak demand? | We provide the manufacturer's first-hour rating (gallons delivered in the first hour of peak use) and compare it to your typical morning or evening peak demand. We may suggest a larger tank or a mixing valve strategy when the rating runs tight. | — | First-hour rating isn't really relevant. |
| What is the Uniform Energy Factor (UEF) of the proposed unit, and how does it affect rebate eligibility? | We document the UEF on the spec sheet (modern heat pump water heaters typically range 3.0 to 4.0+ UEF). Many rebates require UEF at or above a threshold (often 3.0) or a NEEA Advanced Water Heater Specification tier rating; we confirm the eligible tier before submitting. | — | UEF doesn't matter for rebates. |
| Will the install be ambient (drawing from the room) or ducted? | Ambient installs are simplest and cheapest in a garage or large utility room. Conditioned-space installs may need ducted intake or exhaust to avoid cooling the living space; ducting adds labor and material cost. We model the tradeoff in the quote. | — | Ducting is always required. |
| What operating modes does the unit support, and which one do you recommend by default? | Most modern units offer heat-pump-only (most efficient), hybrid (heat pump plus resistance backup on high demand), and resistance-only (emergency or cold-snap) modes. We recommend hybrid as a default and explain how mode choice changes runtime and operating cost. | — | Modes are a gimmick; leave it on resistance. |
| What is the manufacturer warranty on the tank, the heat pump compressor, and labor? | Most residential heat pump water heaters carry a 10-year tank warranty and a separate compressor warranty (often shorter). We provide the spec sheet and itemize our labor warranty separately so they aren't confused. | — | Lifetime warranty; no fine print. |
| Does HEEHRA currently offer a rebate for heat pump water heaters? | Heat pump water heaters are a HEEHRA-eligible category statewide; CPUC reservations for HEEHRA were fully subscribed as of February 2026. We verify current status at energy.ca.gov and may mark HEEHRA as assumed until a reservation is confirmed. | — | HEEHRA pays out automatically for every install. |
| Does the unit qualify for TECH Clean California, and what is the current status? | TECH Clean California covers qualifying heat pump water heaters statewide; we verify current scope, eligible model lists, and per-unit incentive amount at techcleanca.com before citing a number in the quote. | — | TECH covers every model on the market. |
| Does the BayREN Home+ program offer a rebate path for heat pump water heaters? | BayREN Home+ has historically offered a heat pump water heater rebate for Bay Area homeowners. We verify current program scope and rebate amount at bayrenhomes.org before submitting. | — | BayREN funds every Bay Area install at the same amount. |
| Does the federal Section 25C credit apply to the install? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Heat pump water heater installations completed in 2026 or later do not qualify for the §25C federal tax credit. | — | The federal credit applies as long as you install before tax day. |
| Who coordinates the plumber and electrician — your team or me? | We coordinate plumber and electrician scheduling under a single project lead, sequence the work so electrical and plumbing don't conflict, and present a unified quote with both trades line-itemed. | — | You hire and coordinate the electrician separately. |
| If we are switching from gas, how will you decommission the gas line? | We cap and label the abandoned gas line per CPC, pressure-test or visually verify the cap, and remove the abandoned T&P discharge pipe if it conflicts with the new install. The work is itemized in the quote. | — | Just leave the old gas line where it is. |
| What is your post-install commissioning checklist? | Commissioning includes pressure testing the plumbing, verifying the T&P relief valve and discharge routing, confirming the condensate drain runs free, setting the default operating mode, and walking through the app and any user controls. | — | We turn it on and leave. |
| What is the expected recovery time after a high-demand event, like back-to-back showers? | In heat-pump-only mode, recovery is slower than gas (typically 2 to 3 hours to reheat a depleted tank). Hybrid mode shortens that. We explain mode tradeoffs and may recommend a larger tank or a mixing valve strategy when recovery is a concern. | — | Recovery is the same as gas; no tradeoff. |
| Will the quote separate confirmed incentives from assumed incentives? | Yes. Each incentive line shows program ID, reservation status (confirmed vs assumed), and a verify-by date. HEEHRA, TECH, BayREN, and SJCE EcoHome are commonly marked assumed until reservation is granted. | — | All listed incentives are yours. |
| What is the best next step before signing a heat pump water heater contract? | Get a written quote with line-item pricing covering model, capacity in gallons, first-hour rating, UEF, install location and ducting plan, dedicated electrical circuit, condensate drain plan, gas decommissioning (if applicable), SJPermits.org mechanical and electrical permit fees, and incentives separated into confirmed vs assumed with verify-by dates. | — | Sign today to lock in the incentive before it runs out. |
| Who pulls the mechanical and electrical permits with the City of San Diego DSD for a HPWH install? | We pull both a mechanical permit and an electrical permit through City of SD DSD (opendsd.sandiego.gov) under our contractor license. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 fee schedule. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | We pull both permits through SD DSD and share copies on submission. | HPWHs don't need permits; just swap the tank. |
| I have read about BayREN HPWH rebates online. Does any of that apply in SD? | BayREN is a nine-county Bay Area program; it does not cover San Diego. For SD HPWH rebates the realistic paths are TECH Clean California (reported fully reserved as of November 14, 2025; new reservations waitlisted) and HEEHRA (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted). SDG&E does not run an independent HPWH rebate outside the TECH program. We do not list BayREN in SD quotes. | BayREN does not cover SD; TECH and HEEHRA are the realistic paths and both are currently waitlisted. | BayREN applies statewide; you qualify for SD. |
| Does SDCP have any HPWH-specific program or affect the HPWH operating cost story? | SDCP affects the supply side of your bill — PowerOn (50 percent renewable, default) or Power100 (100 percent renewable, $0.01/kWh premium) replaces SDG&E's generation portion. Switching from a gas water heater to an HPWH moves that load onto your SDCP supply, so the carbon story improves under Power100. SDCP has piloted residential electrification programs from time to time; we verify what is currently active on sdcommunitypower.org before listing it as savings. The TOU rate plan choice on SDG&E (TOU-DR1 or TOU-DR2) still determines the operating-cost math. | SDCP changes the supply mix; operating cost is set by the SDG&E rate plan. | SDCP makes the HPWH free to run. |
| How does the SDAPCD Rule 69.5.1 NOx limit affect a gas water heater replacement vs an HPWH path? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County. The rule applies at replacement; it does not force a switch off gas, but it does limit which gas units can be installed. An HPWH avoids the NOx limit entirely. We document the rule citation and confirm any quoted gas unit meets the listed limit. We then walk you through the HPWH alternative. | Rule 69.5.1 sets the NOx limit on gas replacements; HPWH avoids it. We confirm both paths before quoting. | SDAPCD rules don't matter for water heaters. |
| Can we get a HEEHRA rebate for an HPWH install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. The HPWH-specific category has been one of the more popular ones. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA is waitlisted; we document the reservation status and do not assume it as confirmed savings. | HEEHRA pays the whole HPWH cost; you qualify automatically. |
| Does the federal Section 25C tax credit apply to a 2026 HPWH install in SD? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD HPWH install has it wrong; flag that as a red flag. | §25C does not apply to 2026 installs; TECH and HEEHRA waitlist status is the live conversation. | §25C still applies in 2026; you will receive 30 percent on your taxes. |
| What is UEF and how does the NEEA Advanced Water Heater Specification (AWHS) tier affect rebate eligibility? | UEF (Uniform Energy Factor) is the FTC-required efficiency rating; modern HPWHs run UEF 3.0-4.0. TECH and HEEHRA rebates typically require the unit to meet the NEEA AWHS Tier 3 or Tier 4 spec, which is stricter than UEF alone. We confirm the chosen model is NEEA AWHS Tier 3 or higher before listing it for any rebate. We document the spec in the proposal. | NEEA AWHS Tier 3+ is the typical rebate floor; we confirm before listing. | All HPWHs are the same for rebates. |
| What gallon size is right for our SD household — 50, 65, or 80? | We size against household size, peak hot-water demand, and recovery rate of the HPWH. Rough guidance: 50 gallons for a 1-3 person household, 65 gallons for 3-4 people, 80 gallons for 4+ or households with high simultaneous demand (multiple showers, large soaking tub). HPWHs have lower recovery rates than gas, so for the same household a gas-to-HPWH swap often sizes up one tier. We share the first-hour rating and recovery numbers. | Typical gas-to-HPWH swap sizes up a tier; we share the FHR and recovery numbers. | Just match the old tank size. |
| Should the HPWH go in the garage or in a conditioned-space utility room? | HPWHs need air volume to extract heat from. Manufacturer specs typically require 700-1000+ cubic feet of surrounding air for ambient-mode operation, or ducting if installed in a smaller space. Garage installs are common in SD (mild ambient temperature year-round, plenty of air volume); utility-room installs may need ducting to / from another space. We measure the room volume and confirm the manufacturer spec at the site visit. We do not install where the manufacturer requirements are not met. | Garage typically works in SD; utility-room installs may need ducting depending on volume. | It works anywhere; just plug it in. |
| Should the HPWH be 240V hardwired or a 120V plug-in hybrid (e.g. Rheem ProTerra Plug-In)? | Most HPWHs require a dedicated 240V / 30A circuit (10 AWG conductors, 30A breaker). The 120V plug-in hybrid models (Rheem ProTerra Plug-In, A.O. Smith Voltex AL with 120V option) run slower but use an existing 15A or 20A plug, which avoids panel work entirely. We compare the cost-and-time of running new 240V wire against the slower recovery rate of the 120V unit and share the choice. | 240V is standard; 120V plug-in is worth considering when panel work is costly. | 240V is the only option. |
| What refrigerant does the HPWH use and does it matter? | Most HPWHs use R-134a (older), R-513A, or R-1234yf (lower GWP). Sanden and a few others use natural CO2 (R-744), which has near-zero GWP but higher install cost. The refrigerant choice mostly affects climate impact, not performance. We document the refrigerant in the proposal. | Most modern HPWHs use R-513A or R-134a; CO2 (Sanden) is the low-GWP option at higher cost. | Refrigerant choice doesn't matter; they all work. |
| Rheem ProTerra, A.O. Smith Voltex AL, Bradford White AeroTherm, Stiebel Eltron Accelera 300, or Sanden CO2 for SD? | Rheem ProTerra (50 / 65 / 80 gallon, R-454B, NEEA AWHS Tier 3+) is the volume choice with broad SD installer familiarity. A.O. Smith Voltex AL is comparable, often slightly higher install cost. Bradford White AeroTherm is the local-plumber favorite. Stiebel Eltron Accelera 300 has a strong cold-climate spec (not particularly needed in SD). Sanden CO2 is the highest-efficiency option with a smaller installer base. We share a one-page comparison with first-hour rating, recovery, warranty, and price. | Rheem and A.O. Smith are the SD volume choices; we share a comparison. | Rheem is the only option. |
| What is first-hour rating (FHR) and how do you use it for sizing? | FHR is the gallons of hot water the unit can deliver in the first hour starting from a full tank; it includes both stored hot water and the unit's recovery rate during that hour. We compare your household peak demand (number of simultaneous showers, dishwasher, washing machine) against the FHR of candidate units and pick the unit whose FHR meets or exceeds the modeled peak demand. We share the methodology. | FHR is the practical sizing number; we model peak demand and pick accordingly. | FHR is marketing; just pick a 50-gallon. |
| How is recovery rate different from FHR and why does it matter for an HPWH? | Recovery rate is gallons per hour the unit can heat after the stored hot water is depleted; HPWH recovery rates run 15-25 GPH compared to gas at 40-60 GPH. The slower recovery is why HPWH sizing usually goes up one tier. If your household has back-to-back high-demand events (5 showers in 90 minutes), the recovery rate determines whether you run cold. We share the recovery curve. | Recovery is slower on HPWHs; we size to accommodate it. | Recovery does not matter on hybrid units. |
| How is the existing gas line decommissioned when we switch to an HPWH? | California Plumbing Code requires the gas line to be capped at the appliance with a listed cap and labeled as decommissioned. We document the cap location and the label text in the proposal. SDG&E does not require shutoff at the meter for a single appliance decommissioning. If you are planning further gas elimination later we coordinate the meter-side shutoff at the right phase. | Cap and label per CPC; meter shutoff comes later if you eliminate all gas. | Just disconnect it; no labeling needed. |
| What are the warranty terms on the HPWH? | Manufacturer warranties typically run 10 years on the tank, 6-10 years on parts (heat-pump components), and 1 year on labor. Install-labor warranty is separate and typically 1-2 years from us. We share the manufacturer warranty document and explain what voids each (manufacturer voids on non-licensed install; labor voids on tampering or non-permitted modifications). | Tank plus parts plus labor terms are all separate; we share the documents. | The HPWH is covered forever. |
| What does commissioning include and how do you set up vacation / heat-pump-only modes? | Commissioning includes measured supply temperature at the unit, measured recovery rate during the first heat cycle, condensate-drain verification, and operating-mode setup. Modern HPWHs have heat-pump-only, hybrid, electric-only, and vacation modes; we set up the default for your usage (typically heat-pump-only or hybrid for SD's mild ambient temperatures) and walk you through changing it via the unit or the app. We give you a one-page commissioning report. | We do a startup checklist with mode setup and share the measured values. | Commissioning is just turning it on. |
| Does the SDG&E rate plan choice (TOU-DR1 vs TOU-DR2) change the HPWH operating cost meaningfully? | Yes. HPWHs heat slowly; on TOU-DR1 (4-9pm peak in summer, 5-8pm winter) the unit can be scheduled to heat outside the peak window via the manufacturer app, cutting operating cost. On TOU-DR2 (flatter rates) scheduling has less impact. We model both plans against your household hot-water-use pattern and share the spreadsheet. The unit's electric-only mode draws much more than heat-pump-only; we schedule heat-pump-only by default. | Rate plan matters; we model both and schedule heat-pump-only outside peak. | Rate plan does not matter for water heaters. |
| How is the condensate drain routed in a typical SD garage or interior install? | HPWHs produce 5-15 gallons / day of condensate that must go to a code-approved drain (interior sanitary drain, exterior gravity drain, or condensate pump to a higher drain). California Plumbing Code requires a P-trap and air gap at the drain connection. SD garage installs typically have a nearby floor drain or laundry sink; we share the proposed route at the site visit and confirm it meets CPC. | We confirm the route at site visit; SD garages usually have a usable drain nearby. | Just drain it onto the garage floor; it evaporates. |
| What is the best next step before signing an SD HPWH contract? | Schedule a site visit, confirm the install location (garage or conditioned space) and electrical capacity (240V circuit available or 120V plug-in path), pre-check TECH and HEEHRA reservation status, and get a written quote with line-item pricing: HPWH unit, electrical work, plumbing work, condensate drain, SD DSD permits, commissioning. Compare two or three bids on the same scope and HPWH brand. | Pre-check rebate status and compare two bids on the same scope before signing. | Sign today; the rebate will expire tomorrow. |
| What charger amperage do you recommend, and why? | We size the charger based on your vehicle, expected daily mileage, panel capacity, and future second-EV plans (typically 32-48A continuous draw on a 40-60A circuit). | — | Always install the biggest charger; bigger is better. |
| Will the charger need a dedicated 240V circuit? | Yes. We run a dedicated 240V circuit sized at 125 percent of the charger's continuous draw, with the correct conductor gauge and conduit per code. | — | Share a circuit with the dryer. |
| How will you confirm my panel has capacity for the charger? | We perform an Article 220 load calculation on site, consider existing loads and planned heat pump or HVAC additions, and explain whether smart load management can avoid a service upgrade. | — | Your panel is fine; no calculation needed. |
| Can smart load management let me add a charger without upgrading the panel? | Often yes. Devices like Span panels or charger-side load-share modules may avoid a service upgrade by throttling the charger when other loads (HVAC, water heater) are active. | — | Load management is unreliable; always upgrade the panel. |
| How would you support a second EV without re-wiring everything later? | We may install a load-sharing charger today, or pre-pull conductors for a second circuit. We document the planned future load in the Article 220 calc. | — | One charger is plenty for any household. |
| How will you handle grounding and bonding for the new circuit? | We verify the service ground meets code, bond the charger neutral and equipment per Article 250, and confirm the GFCI protection (built in or required separately). | — | Grounding is standard; nothing to discuss. |
| Where will the conduit run, and what does it cost to extend? | We walk the routing on site (interior wall vs exterior, attic vs trench), specify conduit fill code requirements, and itemize incremental cost per linear foot. | — | Conduit routing is included; don't worry about it. |
| What labor warranty do you provide on the install, separate from the manufacturer warranty? | We provide a 1-2 year labor warranty on installation; the manufacturer warranty (typically 3-5 years on the charger) is separate. | — | Lifetime warranty on everything. |
| Does the federal §30C credit for EV charging equipment apply to my install? | §30C federal EV-charger credit had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21). Installations permitted and operational before that date may have qualified in eligible census tracts (low-income community or non-urban) — verify with your contractor and tax preparer. Installations after June 30, 2026 do not qualify. | — | You will receive the federal credit on your taxes. |
| Are PG&E EV charger rebates currently available? | PG&E's residential EV charger rebate program changes periodically; we verify current funding and program rules with PG&E before submitting on your behalf. | — | PG&E always pays out. |
| Will the quote separate confirmed incentives from assumed incentives? | Yes. Each incentive is marked confirmed (with program ID and current funding status) or assumed (subject to verification before contract signing). | — | All listed incentives are yours. |
| What is the warranty on the charger hardware, and what voids it? | The manufacturer typically warrants the charger for 3-5 years; we note that physical damage, surge events without a whole-home surge protector, and tampering may void coverage. | — | Warranty covers everything forever. |
| What is the best next step before signing a contract? | Get a written quote with line-item pricing including conduit footage, panel-capacity verification, an Article 220 load calc, and a clear permit and inspection plan. | — | Sign today to lock in pricing. |
| Should I plan for bidirectional (vehicle-to-home) charging now or later? | We may explain that bidirectional charging requires a charger with V2H or V2G capability plus a compatible EV; we recommend pre-pulling extra conductors only if you have a specific vehicle target. | — | Bidirectional is mandatory; install it now. |
| Which SDG&E rate plan are you recommending after the charger install: EV-TOU-5, the legacy EV-TOU-2, or staying on TOU-DR1? | We compare three scenarios using your most recent 12 months of usage: EV-TOU-5 (the current EV rate, with super-off-peak overnight pricing and a 4-9pm peak), EV-TOU-2 (the legacy EV rate, still available to existing customers), and TOU-DR1 (the default residential plan with no EV-specific super-off-peak). The EV-TOU-5 super-off-peak window pays off only if you can charge overnight; if you charge during peak hours TOU-DR1 sometimes wins. We share the spreadsheet. | EV-TOU-5 is typical for households charging overnight; TOU-DR1 can win if charging cannot be shifted. We model both before you commit. | EV-TOU-5 is always the cheapest for EV owners. |
| What does the City of San Diego DSD electrical permit process look like for a 240V Level 2 EV charger? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov under our contractor license. Residential EV-charger circuits often qualify as simple no-plan electrical permits per Information Bulletin 103, which can be same-day for straightforward jobs. The application includes a load-calculation page, circuit specifications, AFCI / GFCI required by the currently adopted CEC edition, and the EVSE manufacturer cut sheet. Permit fee is itemized in the proposal. We share copies of all docs with you. | We pull the SD DSD permit and share copies; same-day issuance is common for simple Level 2 EVSE jobs. | EV chargers don't need permits in San Diego. |
| Does the federal Section 30C EV charger credit apply to my install? The OBBBA changed the timeline. | §30C federal EV-charger credit had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21). The credit covered 30 percent of equipment plus installation up to $1,000 for residential, the property had to be placed in service by June 30, 2026, and the address had to be in an eligible (non-urban or low-income community) census tract. Installations permitted and operational before that date may have qualified — we confirm whether the SD property was in an eligible tract before listing the credit; many central City of SD addresses were not. Installations after June 30, 2026 do not qualify. | §30C had a sunset on June 30, 2026 and required census-tract eligibility; for installs before that date we verify the address before adding it as a confirmed line item, and for installs after that date the credit is not available. | 30C is permanent; you will receive the credit on your taxes. |
| Does San Diego Community Power have an EV-specific program or bill credit I should know about? | SDCP is your default CCA in most of the City of SD. The supplier-side rate (PowerOn at 50 percent renewable, or Power100 at 100 percent for an extra $0.01/kWh) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. SDCP has piloted residential EV programs from time to time; we verify what is currently active on sdcommunitypower.org before listing it as savings. SDCP enrollment does not change the underlying SDG&E EV rate plan choice (EV-TOU-5 vs TOU-DR1). | SDCP affects the supply side of the bill; EV-specific savings come from SDG&E rate-plan choice, not from SDCP. | Switching to SDCP makes EV charging free. |
| How do you size the dedicated circuit per NEC Article 625 for the EVSE? | NEC 625 classifies EV charging as a continuous load, which requires a circuit sized at 125 percent of the EVSE's rated continuous current. For a 48A EVSE that is a 60A circuit (60A breaker, conductors rated for 60A continuous including any derating). We document the EVSE rated current, the breaker size, and the conductor gauge in the proposal. | We size at 125 percent per NEC 625 and document the breaker plus conductor selection. | Just match the breaker to the charger's amp rating. |
| Will you do a full NEC Article 220 load calculation on the SD panel before quoting? | Yes. We tabulate current connected loads (range, dryer, water heater, HVAC, general lighting) per NEC 220 demand factors and add the EVSE as a continuous load at 125 percent. We then add planned future loads (HP HVAC, HPWH, induction, battery) if the homeowner is staging a whole-home plan. The calculation sheet goes into the proposal so you can verify it. | Load calc is standard practice for any new EVSE circuit; we share the sheet. | Most SD houses are fine; no load calc needed. |
| Which smart Level 2 chargers do you recommend for off-peak scheduling, and what is the brand tradeoff? | Common choices are Tesla Universal Wall Connector (NACS plus J1772 adapter, 48A), ChargePoint Home Flex (50A), Wallbox Pulsar Plus (40A), and the Emporia EVSE (48A) for budget. We compare based on connector type, max continuous amperage, WiFi reliability for off-peak scheduling against the SDG&E EV-TOU-5 super-off-peak window, OCPP support for utility demand-response, and install-warranty terms. We share the comparison so you can pick. | Tesla's Universal is becoming the default; ChargePoint and Wallbox are reasonable alternatives. | Brand does not matter; they are all the same. |
| My older La Jolla or North Park home has a 100A or 125A panel. Can load management avoid a panel upgrade? | Often yes. After the NEC 220 calc we look at smart load management options: a charger with built-in load management (DCC, Wallbox Pulsar Plus), a whole-home device (Span panel, Emporia Vue with load shed), or a dedicated EV load management device. We compare device cost plus install against the panel-upgrade cost and share both numbers. Older SD homes with subfeeds to detached garages sometimes still benefit from upgrading. | Load management often works; we share both options with costs. | Always upgrade to 200A; that is the only path. |
| SD has Title 24 solar-mandate new homes pre-wired for solar, and I am thinking about adding solar later. How does that affect the EVSE install and the panel? | Future solar plus battery touches the same panel; NEC 705.12 sets a 120 percent rule for combined inverter sources plus main breaker against the busbar rating. We document the existing busbar rating now so the future PV install knows the headroom. Where the busbar is undersized we recommend a sub-panel or a smart panel as part of the EVSE work to avoid a second panel upgrade later. | We document the busbar rating now; the future solar contractor uses it for the 705.12 calculation. | Solar has nothing to do with EVSE installs; do not worry about it. |
| The panel is in the front of the house and the parking spot is at the back of a deep SD lot. How do you size for voltage drop? | We measure the actual conductor run length, apply NEC 210.19 informational note recommendations (under 3 percent voltage drop on branch circuits), and upsize the conductor gauge if needed. Long runs on a deep SD lot can push 6 AWG to 4 AWG. We document the calculated voltage drop and the conductor selection in the proposal. | We measure the run, calculate, and upsize the conductor where needed. | Voltage drop is not real; copper is copper. |
| If the EVSE is in an outdoor or detached-garage location, what ground-fault protection is required? | Outdoor receptacles require GFCI protection per NEC 210.8; many EVSEs include internal CCID-20 ground-fault detection that conflicts with an upstream GFCI breaker (nuisance trips). For hardwired EVSEs we follow the manufacturer's install manual, which usually says no upstream GFCI. For NEMA 14-50 receptacles we use a GFCI breaker. We document the chosen approach and confirm it matches the EVSE manual. | Hardwired EVSE typically does not need upstream GFCI; receptacle install does. We follow the manufacturer manual. | GFCI is optional outdoors; the breaker does not matter. |
| Should the install be a NEMA 14-50 receptacle or hardwired EVSE? | NEMA 14-50 receptacles are convenient (charger is portable) but limit continuous current to 40A (50A breaker, 80 percent continuous). Hardwired allows 48A continuous (60A breaker) and avoids receptacle-failure risk under heavy continuous use, which has been a documented failure mode on residential 14-50s. For frequent charging at full 48A we recommend hardwired; for occasional charging the receptacle is fine. We document the recommendation and the basis. | Hardwired for frequent high-amperage charging; 14-50 receptacle is fine for occasional use. | Always use a NEMA 14-50; it is the standard. |
| Does any local SD rebate program cover the EVSE install cost? | BayREN does not cover SD County. SDG&E has historically run periodic EV-charger or EV-circuit rebates and SDCP has piloted residential EV programs; both change from year to year. We verify on sdge.com and sdcommunitypower.org what is currently active for the SD market before listing any line item; if there is no currently funded rebate we do not invent one. We do list the federal §30C status (had a statutory cliff on June 30, 2026 per OBBBA Public Law 119-21; pre-cliff installs may have qualified in eligible census tracts; post-cliff installs do not qualify) and any active utility program. | BayREN does not apply in SD; we verify current SDG&E and SDCP programs and only list confirmed rebates. | BayREN covers EV chargers; you will get the rebate. |
| How are the City of SD DSD permit fees itemized in the quote? | We itemize plan check fee (if a plan is required), permit issuance fee, and inspection fee separately as a pass-through cost, not bundled into labor. We share the SD DSD fee schedule URL (Information Bulletin 103 or 501) and the application receipt. Total residential EV charger permit fees in SD typically land in the low-hundreds-of-dollars range; we document the actual figure once SD DSD quotes it. | Permit fees are itemized; we share the receipt. | Permits are included; do not ask about the breakdown. |
| Some EVSE brands require an authorized installer for the install warranty. Are you certified for the brand we are picking? | We share our manufacturer certifications (Tesla Approved Wall Connector Installer, ChargePoint Certified Installer, Wallbox Certified Installer, etc.) and confirm the chosen brand is on that list before signing. Using a non-certified installer can void the install warranty even if the equipment warranty is intact. | We share certifications before signing. | Manufacturer certifications do not matter. |
| If solar is in the future plan, should we oversize the conduit now during the EVSE install? | Often yes. Pulling spare conduit (or a larger conduit with a pull string) during the EVSE trench or wall chase avoids a second open-up later. The marginal cost during this install is small. We share the conduit-fill calculation per NEC Article 300 and Chapter 9 Table 1 and confirm the spare capacity meets future PV plus battery conductor sizes. | We propose a small upsize when the homeowner has a stated solar plan. | Spare conduit is wasted money. |
| Will the chosen charger support utility demand-response programs via WiFi or OCPP? | Most modern Level 2 chargers (Tesla, ChargePoint, Wallbox, Emporia) support WiFi-based off-peak scheduling, which is the practical match for the SDG&E EV-TOU-5 super-off-peak window. Open Charge Point Protocol (OCPP) support varies by brand and is required for some utility demand-response enrollments; ChargePoint and Wallbox have stronger OCPP coverage, Tesla supports its own ecosystem. We share which protocol the chosen charger uses and what utility programs accept it. | WiFi scheduling against EV-TOU-5 is the feature most SD homeowners use; OCPP matters if you want to enroll in an SDG&E or SDCP demand-response program. | Smart features do not matter; just plug it in. |
| What is the separate warranty on the charger hardware vs the install labor? | Charger hardware typically comes with a 3-5 year manufacturer warranty (Tesla 4 years, ChargePoint 3 years, Wallbox 3 years). Our install labor warranty is separate (usually 1 year). We share both warranty terms in writing and explain what voids each (manufacturer voids on non-authorized installer; labor voids on tampering or non-permitted modifications). | We share both warranties in writing and explain what voids each. | Everything is covered forever. |
| We are in an East County hillside the City flagged as a Very High Fire Hazard Severity Zone. Does that affect how we route the EVSE conduit? | WUI zones in the City of SD adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC R327 / R337 sets ignition-resistant material and clearance standards for structures and accessory equipment in WUI zones; exterior conduit and any junction boxes must use listed materials and meet defensible-space clearances. We verify the WUI zone for the address before routing and document the materials choice in the permit. | WUI status affects conduit material and routing; we verify the zone before quoting. | WUI rules only apply to brand-new construction. |
| If I live in a condo or apartment without garage parking, are there public-charging or shared-charging options to know about in SD? | SDG&E and SDCP both participate in CPUC-funded programs subsidizing multi-unit-dwelling and public Level 2 chargers; CSE (Center for Sustainable Energy) administers some of these for SDG&E territory. These are not direct private residential installs; we mention them so you know the alternatives if a private install at your address is not feasible. For private installs we focus on what your unit and HOA allow; for shared options we point you at PlugShare and the SDG&E + SDCP program pages to research current availability. | If your unit cannot support a private install we point you at the current SDG&E and SDCP multi-unit and public-charger options to research separately. | Condo owners cannot get any EV charging in SD. |
| How will you size the solar array for our future electric load (heat pump HVAC, EV, water heater)? | We model expected future usage including planned heat pump, EV miles, and water heater, then size the array to offset that load under NEM 3.0 export economics. | — | We size the system from last year's utility bill only. |
| How does NEM 3.0 change the economics versus older interconnections? | NEM 3.0 cut export compensation by ~75 percent versus NEM 2.0, which makes battery storage important for self-consumption. We model expected savings under NEM 3.0 specifically. | — | NEM 3.0 is the same as NEM 2.0 economically. |
| Is my roof suitable for solar, and what is its remaining lifetime? | We inspect the roof condition, slope, orientation, and shade pattern; we recommend roof replacement first if the roof is near end of life. | — | Any roof works. |
| Which panel and inverter brands do you recommend, and why? | We name the specific panel model (wattage, efficiency, temperature coefficient, degradation curve) and inverter brand (string vs microinverter), explain the tradeoffs for our roof, and provide the manufacturer datasheets. | — | We use whatever is cheapest in stock this month. |
| Will the array use string inverters, microinverters, or DC optimizers, and why? | We choose based on roof shading patterns and orientation: microinverters or optimizers for shaded or multi-orientation roofs, string inverters for unshaded uniform arrays. We explain the cost and monitoring tradeoff. | — | Microinverters are always best. |
| What does the shade analysis show for our roof across the year? | We run a shade analysis tool (HelioScope, Aurora, or similar) using a site survey and roof imagery, and we share the annual production estimate per panel with shade losses called out. | — | Shade is not significant. |
| Do you offer a production guarantee, and how is it enforced? | We offer an annual production guarantee in kWh based on the design model, and we explain the remediation path (true-up payment or system correction) if actual production falls below the threshold. | — | Production guarantees are a marketing gimmick. |
| What monitoring platform comes with the system, and are there subscription fees? | We name the monitoring platform (Enphase Enlighten, SolarEdge mySolarEdge, or similar), describe what data is visible per panel or per string, and disclose any optional or recurring fees. | — | Monitoring is included; do not worry about the details. |
| If we add a battery later, can we still apply for SGIP at that time? | Yes — SGIP applications are tied to the battery install, not the solar install. As of 2026, only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open to new applications, and that budget is fully reserved with new apps on a waitlist served via attrition; ratepayer-funded General Market / Equity / Equity Resiliency budgets are no longer accepting new applications. We verify current SGIP budget status at selfgenca.com when the battery is added and explain that pre-approval is required before equipment is delivered. | — | SGIP only counts if solar and battery are installed together. |
| Does the federal Section 25D residential clean energy credit apply to my installation? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for the 30 percent §25D credit. | — | You will receive the 30 percent federal credit on your taxes. |
| Does TECH Clean California currently offer a solar incentive? | TECH Clean California primarily targets heat pump HVAC and heat pump water heaters, not standalone solar. We verify current TECH program scope at techcleanca.com before citing any incentive. | — | TECH covers solar; assume the rebate applies. |
| Are BayREN Home+ rebates available for our solar or solar plus battery project? | BayREN Home+ is primarily a building shell and heat-pump program for Bay Area homeowners; we verify whether a solar or battery incentive is currently active at bayren.org and explain the application path if so. | — | BayREN always pays out for solar. |
| Who handles the PG&E interconnection paperwork, and what is the typical timeline? | We submit the PG&E interconnection application on your behalf, file the city permits, and coordinate Permission to Operate (PTO). Typical PG&E PTO timelines range from 2 to 6 weeks after the city sign-off; we document the expected window in the quote. | — | Interconnection happens automatically. |
| What is your post-install commissioning checklist? | Commissioning includes verifying each panel reports correctly in the monitoring platform, checking inverter firmware, confirming production matches the design model on a clear day, and walking us through reading the monitoring app. | — | We turn it on and leave. |
| How will you confirm the roof structure supports the array? | We perform a structural assessment including rafter sizing, spacing, and condition; for older or unusual roofs we may engage a licensed structural engineer to provide a letter for the permit submittal. | — | Roofs always handle solar. |
| How will the array meet California fire-setback rules? | We design the array to meet the California Residential Code fire access pathway requirements: ridge setbacks, hip-to-eave pathways, and emergency egress clearances, and we document compliance in the permit submittal. | — | Fire setbacks are optional. |
| What ongoing maintenance does the system need? | Typical maintenance is light: annual visual inspection, occasional rinse if local dust or pollen reduces production, and inverter firmware updates pushed by the manufacturer. We explain the warranty implications of skipping recommended maintenance. | — | Solar is install-and-forget; no maintenance ever. |
| What warranties cover the panels, inverter, and labor? | Panels typically carry a 25 year product warranty plus a 25 year linear production warranty; inverters carry 10 to 12 years standard (extendable); we provide a 5 to 10 year labor warranty separately. We document what voids each. | — | Lifetime warranty on everything. |
| What is the best next step before signing a solar contract? | Get a written quote with line-item pricing including the design model output (kWh per year), shade analysis, panel and inverter make and model, permit and PG&E interconnection fees, production guarantee terms, and warranty terms. | — | Sign today to lock in pricing before incentives change. |
| SD is known for some of the highest solar production in California. How do you model production for a specific SD address? | We use PVsyst or HelioScope with NREL TMY3 data for the nearest SD station (Lindbergh Field for coastal, Miramar or El Cajon for inland) and apply a small microclimate derate where coastal marine layer is significant (Mission Beach, La Jolla mornings can lose a few percent). Typical SD production runs 15-20 percent above SF for the same roof orientation. We do a 12-month model with monthly breakdown and share it. We do not promise specific kWh production; we provide a model. | We model production per neighborhood and share the report; SD coastal vs inland can vary several percent. | SD always gets the same production everywhere. |
| How does NEM 3.0 (Net Billing Tariff) affect the export economics for a typical SD rooftop on SDG&E? | NEM 3.0 took effect April 15, 2023 for new SDG&E interconnections. Export compensation is roughly 75 percent lower than NEM 2.0 and varies hourly by the Avoided Cost Calculator (ACC) rates. A solar-only system with limited self-consumption performs poorly on payback. We model self-consumption with and without battery to show the difference. SDG&E charges a $132 interconnection request fee. We share the ACC export-price hourly schedule we used and the year-1 cost comparison. | NEM 3.0 makes battery storage important for payback in SD; we model both options. | NEM 3.0 is fine; you'll still net to zero on your bill. |
| How do solar permits work with the City of San Diego DSD? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov plus a structural review if required. SD DSD has been an active SolarAPP+ participant for streamlined permitting on standard residential rooftop designs; we use SolarAPP+ when eligible. PTO (permission to operate) from SDG&E typically takes 2-6 weeks after final inspection. We share all permit applications and inspection cards. Same-day issuance is common for SolarAPP+-eligible designs. | We use SolarAPP+ when eligible; otherwise standard SD DSD plan check applies. | Solar permits are universal same-day in SD. |
| Does the federal Section 25D residential clean-energy credit apply to a 2026 SD solar install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25D federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25D does not apply to 2026 installs; the federal stack is gone for solar. We model payback without it. | §25D still applies in 2026; you will receive 30 percent on your taxes. |
| Do you offer a production guarantee on the SD install? | We use Aurora, HelioScope, or PVsyst to produce a year-1 modeled kWh number for your specific roof, then offer a production guarantee at 90-95 percent of modeled output. If production falls below the guarantee in year one, the remedy is documented in the contract (typically a check for the kWh shortfall at the locked-in retail rate, or a system check-up at no charge). We do not call this a savings guarantee; that is a different claim. | Production guarantee at 90-95 percent of modeled output is typical; we document the remedy in the contract. | We guarantee you will save 80 percent on your bill. |
| Microinverters (Enphase IQ8 series) or string inverter with optimizers (SolarEdge) for an SD roof? | We compare both based on your roof. Microinverters fit best where the roof has multiple orientations or shading from neighboring trees or chimneys. String + optimizers can be slightly cheaper on a single clean south-facing slope. We share the modeled production for both topologies. Battery-ready coupling differs: Enphase pairs with IQ Battery (AC-coupled); SolarEdge pairs with their own Energy Bank (DC-coupled) or AC-couples with most batteries. | Microinverters for shaded or multi-orientation roofs; string with optimizers for clean south-facing single slopes. | Microinverters are always better; string is obsolete. |
| My SD home has a 25-year-old composition roof. Should I re-roof before solar? | If the roof has fewer than 10-12 years of remaining life we recommend re-roofing first, because removing and reinstalling a solar array later runs $2,000-$5,000 in labor depending on size. SD's mild climate is relatively kind to composition shingles, but the 25-year mark is the typical replacement point. We share the roof assessment in writing; if it is borderline we show the cost comparison of re-roof-now vs solar-now-plus-remove-reinstall-later. | Older than 25 years usually re-roof first; we share the assessment and the cost comparison. | Roof age does not matter; just install on top. |
| We have a Spanish-style clay tile roof. How does that change the structural and racking approach? | Clay or concrete tile roofs require tile-hook flashing, not standard composition lag-bolt flashing, and the installer has to either remove and reinstall the tile around each penetration or use a tile-replacement bracket. Tile racking adds material cost and labor. We document the rack type (e.g. Quick Mount PV Tile Replacement, IronRidge Tile Hook) and confirm the structural review accounts for the dead load of the tile. | Tile requires specialized hooks and adds labor; we document the rack choice and the structural calc. | Tile roofs use the same racking as composition. |
| I bought a newer SD home that was built under the Title 24 Solar Mandate but has no panels. How does that affect a retrofit? | California's Title 24 Solar Mandate applies to new construction permits filed after January 1, 2020; many newer SD homes are pre-wired for solar even if no panels were installed. We confirm whether the home has a dedicated solar-ready conduit run from roof to main panel and whether a 200A panel was pre-installed; both shorten the install. For homes outside the mandate (built before 2020) we follow standard retrofit conduit and panel-side-work. | We confirm at the site visit whether the home is solar-ready; newer SD homes often are. | All California homes are Title 24 ready. |
| We are in the East County foothills the City marked as a Very High Fire Hazard Severity Zone. How does that affect the array layout? | CRC R327 / R337 sets roof access pathway and ridge-clearance requirements for solar arrays in WUI zones. Typical requirements include a 36-inch wide pathway from eave to ridge, a 36-inch clearance to the ridge along the array, and an unobstructed pathway between arrays. The City of SD adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. We confirm the WUI zone for the address and document the setback dimensions in the permit drawings. | WUI status changes the array layout; we verify the zone and document setbacks. | Fire setbacks only apply to commercial. |
| What are the warranty terms on panels, inverters, and the install labor? | Panel manufacturers typically offer a 25-year linear performance warranty and 12-25 year product warranty (varies by brand). Inverter warranties run 10-12 years (string) or 25 years (Enphase microinverters). Install-labor warranty is separate and typically 5-10 years. We share all three terms in writing and explain what voids each (manufacturer voids on non-authorized installer; labor voids on tampering or non-permitted modifications). | We share panel, inverter, and labor warranty terms separately in writing. | Everything is covered for life. |
| A neighbor's mature palm or eucalyptus shades part of our south-facing roof. What can we do? | We do a shading analysis using HelioScope or Aurora and model the array with the current shading. California Solar Rights Act (Public Resources Code 25980-25986) and the Solar Shade Control Act limit certain tree-shading effects on existing solar arrays, but the rules are nuanced and we do not advise on the legal side. We design the array to minimize shade impact (microinverters or string optimizers, panel layout) and document the modeled production loss. | We model the shading and design around it; the legal questions about neighbor trees are separate from the install design. | Solar Rights Act lets you cut down any neighbor's tree. |
| How does dust and the salt air affect long-term production in SD? | SD's dry summers and seasonal Santa Ana wind events deposit dust on panels; coastal homes also get salt-air. We use a 3-5 percent annual soiling derate in the production model for typical SD addresses. Rainy seasons typically clean the panels naturally; we do not recommend paid washing services unless soiling visibly exceeds the model. For coastal homes we spec coastal-rated frames and clamps and document them in the proposal. | Soiling derate is 3-5 percent in SD; rain handles most of it. Coastal hardware spec is documented. | Soiling does not exist in SD; you do not need to clean panels. |
| What monitoring platform do you use and what does commissioning look like? | Common platforms are Enphase Enlighten (microinverter systems), SolarEdge mySolarEdge (string with optimizers), and Aurora or HelioScope for design-side modeling. Commissioning includes measured array Voc / Isc, inverter power output at startup, communication with the monitoring platform, and the SDG&E PTO submission. We give you a one-page commissioning report and the monitoring login. We do not consider the install complete until the monitoring shows production. | We commission, share the report, and confirm monitoring is reading before signing off. | Monitoring is optional; just turn it on and walk away. |
| How does the SDG&E interconnection process work and what is the timeline? | We submit the SDG&E NEM application after install with the inverter cut sheet, single-line diagram, electrical-permit final card, and the $132 interconnection-request fee. SDG&E reviews and issues PTO; typical timeline runs 2-6 weeks but has occasionally stretched longer. The Net Billing Tariff agreement is then activated. We do not let you turn the system on before PTO; doing so risks losing the agreement and incurring penalties. | We submit after final inspection; you operate only after PTO. | Turn the system on as soon as the panels are mounted; PTO is a formality. |
| I am planning HP HVAC, HPWH, and an EV charger later. Should you size the solar for current usage or future load? | We size for the future modeled load, not the past 12 months. We work with your stated electrification plan (HP HVAC + HPWH + EV charger + future battery) and run a Manual J for HVAC plus a load-aggregation table for the rest. NEM 3.0 economics favor self-consumption, so the array size is tied to the future consumption pattern not the past. We share the future-load assumption sheet. | We size against the future stated plan; we share the assumption sheet. | We size from last year's bill only. |
| How do you handle NEC 690 PV installation and the NEC 705.12 120 percent rule on the panel interconnection? | NEC 690 governs PV-system wiring (conductor sizing, disconnect placement, rapid shutdown per 690.12). NEC 705.12 sets the 120 percent rule for combined inverter sources plus main breaker against the busbar rating; we verify the existing panel busbar rating, the main breaker, and the planned PV breaker against the calculation. If the busbar fails the calc we recommend a line-side tap, a sub-panel, or a main-breaker derate. We document the calc in the permit. | We do the 705.12 calc and document it in the permit; remedy paths are part of the proposal. | 705.12 is optional; the inspector never checks. |
| I have read about BayREN solar incentives. Does any of that apply in SD? | BayREN is a nine-county Bay Area program; it does not cover San Diego. The SD solar-incentive landscape is now primarily federal-less (§25D expired Dec 31 2025) and SGIP for storage administered by CSE. We do not list BayREN in SD quotes. We list confirmed line items only: SDG&E PTO + NEM 3.0 agreement, SGIP for any battery, any active SDCP program at the time of contract. | BayREN does not cover SD; the realistic stack is SGIP for storage plus any active SDCP program. | BayREN applies statewide; you qualify for SD. |
| Does enrolling in SDCP Power100 instead of the default PowerOn change the solar economics? | Slightly. Power100 adds about $0.01 per kWh to the supplier side of your bill, which is a real cost that shows up before the solar offset. The solar array itself does not care which SDCP product you are on; what changes is the cost of the grid kWh you import (slightly higher under Power100). We share the modeled bill on PowerOn vs Power100 with and without solar so you can decide. | Power100 is optional and adds a small premium; the solar payback math is largely the same. | Power100 is required for solar. |
| What is the best next step before signing an SD solar contract? | Schedule the site visit, get the PVsyst or HelioScope production model with neighborhood-microclimate derate, confirm SolarAPP+ eligibility through SD DSD, decide on the NEM 3.0 self-consumption strategy (solar-only vs solar plus battery with SGIP), and get a written quote with all line items: panels, inverter, racking, labor, permits, structural review, monitoring. Compare two or three bids on the same scope. | Compare two or three bids on the same scope before signing. | Sign today; the prices are going up. |
| Which circuits will be backed up during an outage, and for how long? | We provide a backup-loads list (refrigerator, internet, lights, HVAC controls, well pump if any), estimate runtime in hours at typical and worst-case usage, and explain whether whole-home or essential-loads backup is recommended. | — | The battery powers the house. |
| Does my install qualify for SGIP (Self-Generation Incentive Program), and at what tier? | We verify current SGIP budget status before quoting: as of December 31, 2025 the ratepayer-funded General Market, Equity, and Equity Resiliency budgets are closed to new applications, and only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open — and that budget is fully reserved with new applications served via an attrition-based waitlist (selfgenca.com). We document the waitlist position rather than promising a rebate, and we explain that pre-approval is required before equipment is delivered. | — | SGIP always pays out the maximum amount. |
| What is the battery's usable kWh and continuous inverter power, and how do they relate? | We specify both: kWh determines how long the backup lasts; the inverter's continuous AC output determines what can run at once (refrigerator + lights + maybe HVAC vs everything). | — | kWh is the only number that matters. |
| Is the battery AC-coupled or DC-coupled with the solar array, and why? | AC-coupled batteries use a separate inverter and are easier to retrofit to existing solar. DC-coupled batteries share an inverter with new solar and are typically more efficient end-to-end. We choose based on whether the solar array is new or existing. | — | Coupling does not matter. |
| Can we add more battery capacity later, and what are the limits? | Most modern systems support stacking additional units up to a vendor-specified maximum. We document the maximum stack today, what is needed to add capacity later (matching firmware, software update, possible electrical re-work), and whether SGIP can be applied to expansion units. | — | Buy the biggest battery today; expansion is impossible. |
| What depth-of-discharge limit does the battery use, and how does that affect usable kWh? | We explain the nameplate kWh vs usable kWh: modern LFP batteries reserve very little for cycle life (often 95 to 100 percent of nameplate is usable); older chemistries reserve 10 to 20 percent. We quote usable kWh in the proposal so you can compare like-for-like. | — | Nameplate kWh is the usable kWh. |
| What is the manufacturer warranty on the battery, and what limits it? | Most residential batteries carry a 10 to 12 year warranty, often paired with a cycle count (e.g. 6,000 to 10,000 cycles) or throughput limit (e.g. 37.8 MWh) - whichever comes first. We provide the spec sheet and explain what voids coverage. | — | Lifetime warranty; no fine print. |
| Are time-of-use arbitrage cycles counted against the warranty? | Yes. Every charge-discharge cycle counts toward the throughput limit; aggressive daily TOU arbitrage may shorten the years-based warranty window. We model expected cycles per year for your usage pattern. | — | Cycling does not count against the warranty. |
| How will the battery shift load away from PG&E peak hours? | We program the battery to charge from solar during midday and discharge during the PG&E EV2-A or E-ELEC peak window (typically 4-9pm), saving you the peak-period delta. We tune the schedule for your actual usage and rate plan. | — | The battery charges and discharges whenever. |
| How does NEM 3.0 change the battery payback? | Under NEM 3.0, export compensation dropped by roughly 75 percent, so self-consumption (using your solar via the battery instead of exporting) is now the primary battery economic driver. We model expected savings under NEM 3.0 with your specific rate plan. | — | NEM 3.0 has no effect on battery payback. |
| How will the install meet CRC 1207 / R327 fire-setback rules for energy storage? | We design the install per California Residential Code R327 (formerly section 1207): separation from windows, doors, openings into the dwelling, and other batteries; smoke and heat detectors per code; and an exterior wall location where possible. We document compliance in the permit submittal. | — | Fire setbacks are optional. |
| What is your post-install commissioning checklist? | Commissioning includes verifying battery state-of-charge reporting, testing backup-mode transfer with a simulated outage, walking through the app for backup-only vs TOU modes, and confirming the SGIP system performance metering is functioning if SGIP is part of the project. | — | We turn it on and leave. |
| Are you an installer certified by the battery manufacturer? | Yes. We provide our certification number for the specific battery brand (Tesla Powerwall, Enphase IQ, LG Chem RESU, FranklinWH, etc.); certification is typically required to preserve full warranty coverage. | — | Certification does not matter for batteries. |
| Who handles the PG&E interconnection update for the new battery? | We submit the updated PG&E interconnection paperwork to add the battery to your existing or new solar interconnection, and we obtain the updated Permission to Operate before energizing. | — | PG&E interconnection happens automatically. |
| What panel-side breaker work or interconnection method does the battery require? | We confirm whether the battery interconnects via a back-fed breaker (with sum-of-breakers check per NEC 705.12), a supply-side tap, or a dedicated battery sub-panel; we show the calculation on the permit drawings. | — | Any spare slot will work. |
| Does the federal Section 25D residential clean energy credit apply to my battery install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Battery installations completed in 2026 or later do not qualify for the 30 percent §25D credit. | — | You will receive the 30 percent federal credit on your taxes. |
| Does HEEHRA or TECH Clean California currently offer a battery incentive? | Neither HEEHRA nor TECH primarily fund residential batteries; SGIP is the main California battery program. We verify current TECH scope at techcleanca.com and HEEHRA status at energy.ca.gov before citing any battery incentive. | — | HEEHRA covers batteries automatically. |
| Will the quote separate confirmed SGIP incentives from assumed? | Yes. SGIP is marked confirmed only after pre-approval is granted and the funding tier is reserved; we mark the line as assumed in the quote until then and explain the reservation status. | — | All listed incentives are yours. |
| What is the best next step before signing a battery contract? | Get a written quote with line-item pricing including usable kWh, continuous AC inverter output, AC vs DC coupling, manufacturer warranty terms (years AND cycles AND throughput), labor warranty separately, SJPermits.org permit fees, PG&E interconnection plan, and an honest SGIP workflow: as of December 31, 2025 only the AB 209-funded RSSE budget accepts new applications and it is fully reserved (attrition-based waitlist via selfgenca.com), so the proposal documents the waitlist position rather than promising a rebate. | — | Sign today to lock in SGIP before funding runs out. |
| How does SGIP apply for a residential battery in SDG&E territory and who administers it? | SGIP in SDG&E territory is administered by Center for Sustainable Energy (CSE, energycenter.org, sgipsd.org), not by SDG&E directly. Budget status as of 2026: per the program administrator, the ratepayer-funded Residential General (around $150 per kWh), Equity (around $850 per kWh), and Equity Resiliency (around $1,000 per kWh for high-fire-threat-district or low-income medical-baseline customers) budgets are no longer accepting new applications. Only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open — and that budget is fully reserved as of December 31, 2025; new applications go to a waitlist served through attrition of cancelled projects. RSSE rates were around $1,100 per kWh storage plus around $3,100 per kW solar, targeted at income-qualified solar-plus-battery customers. Pre-approval is required before installation; we verify current budget status at sgipsd.org and selfgenca.com before quoting, reserve through CSE when the path is open, and document the reservation number (or waitlist position) in the proposal. We confirm only what we have reserved; we do not assume eligibility. | We verify current SGIP budget status via CSE; only RSSE remains open and that budget is on a waitlist via attrition. We document the waitlist position rather than promising a rebate. | You will receive SGIP for the whole battery cost. |
| How does the battery improve solar payback under NEM 3.0 in San Diego on SDG&E? | Under NEM 3.0, exporting to the grid pays roughly 75 percent less than under NEM 2.0. A battery stores midday solar for use during the 4-9pm peak window, which is the highest-rate window on SDG&E TOU-DR1 and EV-TOU-5. We model self-consumption ratio (typically 60-80 percent with battery vs 30-50 percent solar-only) and share the year-1 cost comparison. | Battery improves payback under NEM 3.0 in SD; we show the modeled difference for your usage. | Adding a battery always cuts your bill in half. |
| What does the City of San Diego DSD permit process look like for a battery install? | We pull a City of SD DSD electrical permit through opendsd.sandiego.gov. For wall-mounted batteries we also confirm structural attachment per the manufacturer install manual. Fire setback follows CRC R327 / R337; we document the setback measurements in the permit. Final card sign-off happens at inspection. We share all permit copies. | SD DSD permits required; we share copies on submission. | Batteries don't need permits in SD for under 20 kWh. |
| AC or DC coupling for the battery — and how does that interact with my existing SD solar inverter? | DC-coupled batteries (Tesla Powerwall 3 with integrated PV inverter, SolarEdge Energy Bank with SolarEdge inverter) share one inverter for solar and battery, which is more efficient and cheaper if you are installing solar and battery at once. AC-coupled batteries (Enphase IQ Battery, FranklinWH, LG Energy Solution RESU paired with a separate hybrid inverter) bolt onto an existing solar array. For a battery-only retrofit on existing solar AC-coupled is the path; for new combined solar plus battery either works and we model the cost difference. | DC for new combined installs; AC for retrofitting onto existing solar. | AC vs DC does not matter at all. |
| What is on the backup-loads list for a typical SD home? | Common backup loads we size for include lights, refrigerator, freezer, internet router and modem, garage door opener, and at least one outlet circuit. SD does not have PG&E-style PSPS shutoffs, so battery backup runtime targets are typically a few hours of evening peak coverage plus occasional storm outages, not the 8-24 hour PSPS-driven sizing common in PG&E territory. For homes with medical equipment or remote work needs we add specific circuits. We share the list so you can edit before sign-off. | We list the backup circuits; SD outage patterns are usually shorter than PG&E territory. | The battery runs your whole house automatically. |
| Should we install one battery or scale to two or three? | Typical SD residential sizing is one 10-15 kWh battery (Tesla Powerwall 3, Enphase IQ Battery 10, FranklinWH aPower 2) for evening peak-shifting; two units for whole-house backup; three units for off-grid-style resilience. We size against your backup-loads list (kWh per outage hour) and your TOU peak-window kWh. SGIP rebate scales by usable kWh, so a larger system pulls more rebate but the marginal payback diminishes after the second unit. | One unit for peak-shifting plus essentials; two for whole-house; we size against the backup list. | Always install three; bigger is always better. |
| Critical-loads panel or whole-house backup with an automatic transfer switch? | Critical-loads panel (a small sub-panel that holds only the backup circuits) is the simpler and cheaper path; whole-house backup uses a Tesla Gateway 3 or equivalent automatic transfer switch on the main, which costs more but transfers everything. The whole-house path needs careful load management to avoid tripping the battery's inverter output limit (typically 5-10 kW continuous per battery). We share both options with cost. | Critical-loads panel is the common SD outcome; whole-house works if the load profile fits the inverter. | Whole-house is the only option. |
| What is depth of discharge (DoD) and how does it affect usable capacity? | LFP (lithium iron phosphate, the chemistry used in Tesla Powerwall 3, Enphase IQ Battery, and most current residential batteries) is rated for high DoD — typically 95-100 percent of nameplate kWh is usable. NMC chemistries had lower DoD (80-90 percent). We quote the usable kWh, not the nameplate, in the proposal. Cycle warranty assumes the battery is cycled within the rated DoD. | LFP gives near-100 percent usable kWh; we quote usable, not nameplate. | DoD is marketing; ignore it. |
| What does the battery warranty actually cover? | Battery warranties have three terms: years (typically 10), cycles (typically 4,000-10,000), and total throughput in MWh. The warranty pays out on whichever limit you hit first. We share the manufacturer warranty document and explain how daily cycling at the nameplate rating would deplete the throughput limit over the warranty years. Install-labor warranty is separate (typically 5-10 years). We do not call the install lifetime-protected; it is not. | Years plus cycles plus throughput; we share the document and explain the limits. | Battery warranty covers everything forever. |
| How long will the battery actually run my SD home during an outage? | Runtime depends on the loaded circuits, the kWh available, and whether the sun is producing. For a 13.5 kWh battery powering a typical critical-loads panel (lights, fridge, internet, a few outlets) at around 1 kWh per hour, expect roughly 12 hours overnight, then solar refills during the day. We model the runtime against the specific loads-list and the time of year, and we share the model. We do not promise a single runtime number without inputs. | Runtime depends on the loads; we model and share for your specific circuit list. | You will run for a week off the battery. |
| Does the federal Section 25D credit apply to a 2026 SD battery install? | Section 25D expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25D federal credit for a 2026 SD battery install has it wrong; flag that as a red flag. SGIP via CSE remains the primary California incentive for storage. | §25D does not apply to 2026 installs; SGIP via CSE is the path that remains. | §25D still applies; you will receive 30 percent on your taxes. |
| How does the SDG&E interconnection process work for a battery alongside or after solar? | Battery interconnection on SDG&E follows the NEM 3.0 Net Billing Tariff agreement. For a battery added to existing solar we submit an amended interconnection application; for a combined new solar plus battery the agreement is part of the original NEM 3.0 application. SDG&E charges a $132 interconnection request fee. Typical timeline runs 2-6 weeks. We do not let you operate the battery in export mode before PTO; doing so risks losing the agreement. | We file the interconnection; you operate in export mode only after PTO. | Just turn it on; SDG&E does not check. |
| How do you handle NEC Article 706 (ESS) and the NEC 705.12 120 percent rule on the SD panel? | NEC 706 governs energy storage system wiring (conductor sizing, ventilation, signage). NEC 705.12 sets the 120 percent rule for combined inverter sources plus main breaker against the busbar rating; we verify the existing panel busbar rating, the main breaker, and the planned battery-inverter breaker against the calculation. If the busbar fails we recommend a line-side tap, a sub-panel, or a main-breaker derate. We document the calc in the permit. | We do the 705.12 calc covering the battery inverter; remedy paths are part of the proposal. | 705.12 only matters for solar, not for batteries. |
| What UL listings should the battery have? | We confirm the battery is UL 9540 listed (system-level energy-storage safety) and the cells inside are UL 9540A tested (cell-level thermal-runaway propagation test). UL 9540A is what fire authorities cite when approving residential installs and is required by many AHJs including City of SD for outdoor and garage installs. We share the listing documents. | We confirm UL 9540 plus UL 9540A and share the docs. | UL ratings do not matter at the residential level. |
| Tesla Powerwall 3, Enphase IQ Battery, or FranklinWH for SD? | Tesla Powerwall 3 has an integrated PV inverter (DC-coupled with optional AC), 11.5 kW continuous output, and a 13.5 kWh nameplate; works well as a combined new-install solar plus battery. Enphase IQ Battery (10 kWh or 5 kWh modules) AC-couples cleanly with Enphase microinverter solar; modular sizing. FranklinWH aPower 2 (15 kWh, 10 kW continuous) is AC-coupled with strong load-management features and works retrofit. We compare based on existing solar, sizing, and price; we share the comparison. | All three are sound; we compare based on existing solar topology and sizing. | Tesla is the only option. |
| What does the monitoring look like day-to-day? | Tesla app, Enphase Enlighten, and FranklinWH app all show real-time power flow (solar, home, battery, grid), historical charts, and TOU schedule controls. We commission the app login during install, walk you through the backup-mode toggle and the TOU peak-shift schedule, and confirm communication with SDG&E AMI metering. We share login docs. | We set up the app and walk you through schedule controls during commissioning. | Monitoring is just a gimmick. |
| Any grounding considerations under NEC Article 250 for the ESS install? | NEC 250 grounding electrode requirements apply to the ESS the same way they apply to a service. We verify the existing grounding electrode system (rod or rebar-encased electrode), confirm the conductor size for the new ESS rating, and bond as required. For installs where the existing grounding is degraded (older SD homes sometimes have single-rod systems below current code) we upgrade per current NEC and document the work in the permit. | We verify and bond per NEC 250; older SD grounding sometimes needs an upgrade. | Grounding does not need to be touched for batteries. |
| We are in an East County WUI zone the City marked as a Very High Fire Hazard Severity Zone. Does the SGIP Equity Resiliency tier apply? | SGIP Equity Resiliency was designed for customers in high-fire-threat districts (per CPUC HFTD map) and on the Medical Baseline program, with significantly higher per-kWh incentives than General or Equity. Many East County and inland-SD addresses fall in HFTD Tier 2 or Tier 3. As of 2026 the ratepayer-funded Equity Resiliency budget is no longer accepting new applications — only the AB 209-funded RSSE (Residential Solar and Storage Equity) tier remains open, and that budget is fully reserved with new applications on a waitlist via attrition. We verify the HFTD designation against the CPUC fire-threat map and walk through eligibility honestly before listing any SGIP line item, but practical access in 2026 is limited to the RSSE waitlist for income-qualified solar-plus-battery projects. Approval is not automatic; we list any SGIP path as pending until confirmed via sgipsd.org / CSE. | Equity Resiliency depends on HFTD designation plus other criteria; we verify before claiming the tier. | Equity Resiliency is automatic in SD; you qualify. |
| What does battery commissioning look like at the end of the install? | Commissioning includes measured State of Charge after first charge cycle, inverter output verification at the panel, backup-loads cutover test (simulated grid outage), TOU schedule programming, app login confirmation, and SDG&E communication test. We give you a one-page commissioning report with measured values and the technician name. We do not consider the install complete without it. | We do a startup checklist with backup cutover test and share the measured values. | Commissioning is a buzzword; the battery either works or it does not. |
| What is the best next step before signing an SD battery contract? | Schedule a site visit, verify SGIP budget status with CSE on sgipsd.org / selfgenca.com (as of December 31, 2025 only the AB 209-funded RSSE budget accepts new applications and it is fully reserved — new apps go to an attrition-based waitlist; we document the waitlist position rather than promising a rebate), decide on the backup-loads list and battery sizing, run the NEM 3.0 self-consumption model on your SDG&E rate plan, and get a written quote with line-item pricing: battery hardware, inverter, gateway, installation labor, SD DSD permits, structural attachment if wall-mounted, monitoring setup. Compare two or three bids on the same scope and battery brand. | Verify SGIP status with CSE — only RSSE is open and it is waitlisted — and compare two bids on the same scope before signing. | Sign today; SGIP funding will run out tomorrow. |
| Will you perform an NEC Article 220 load calculation before sizing the new panel or service? | Yes. We total existing connected loads, apply Article 220 demand factors, then add expected future loads (heat pump HVAC, heat pump water heater, EV charger, induction range, battery) before recommending a service size. | We perform the Article 220 calculation during the site visit and share the worksheet with the quote. | We size from the existing panel rating. |
| Is this a service upgrade or a panel-only replacement, and how do you decide? | We explain the difference plainly: a service upgrade changes the service drop, meter, and main breaker rating (utility coordination required); a panel-only replacement swaps the breaker box at the existing service rating. We base the recommendation on the Article 220 result, not on a default upsell. | We confirm after the load calc whether the existing service amperage is adequate; if it is, we propose a panel-only replacement. | It is the same thing. |
| Who coordinates with the utility for the service upgrade, and what lead time should we expect? | We coordinate with the serving utility (your investor-owned utility such as PG&E, SCE, or SDG&E, or your municipal utility such as LADWP or SMUD) for the service drop, meter swap, and any utility-side work. We document the expected utility lead time in the quote because it often dominates the project schedule. | We open the utility ticket after permit issuance and update the schedule when the utility confirms its lead time. | The utility handles itself. |
| How do you decide between 200A, 225A, or 320A service, and how much headroom should we plan for? | We size to the Article 220 calculated demand plus headroom for the ten-year horizon of electrification projects already on the table. For most California single-family homes adding heat pump HVAC, heat pump water heater, and one or two EVs, a properly sized 200A service is enough; 225A or 320A is only justified when the load calc shows it. | We present two options with the load-calc deltas so the homeowner can decide between 200A and 225A. | Bigger is always better, so we go 320A. |
| When does a smart panel (Span, Lumin, Eaton EV Choice) make sense versus a standard load center? | A smart panel can avoid a service upgrade when load shedding can keep peak demand under the existing service rating, or when granular per-circuit metering is desired. A standard load center is the right choice when the Article 220 result already fits the service rating, the homeowner does not want app-based controls, or budget is tight. | We model both options against the load calc and present the cost delta plus tradeoffs. | Smart panels are always the answer. |
| Is a sub-panel addition (for a detached garage, ADU, or workshop) a viable alternative to a full service upgrade? | A sub-panel can serve outbuilding loads without changing the main service rating when the Article 220 calc shows the existing service still has capacity. We size the sub-panel feeder per NEC and run it under permit. | We compare a sub-panel addition against a service upgrade with the load-calc results, then recommend the option that fits the future plan. | Sub-panels always require a service upgrade. |
| Will you inspect and update the grounding electrode system as part of the panel work? | Yes. We verify the grounding electrode system (ground rods, water-pipe bond, concrete-encased electrode where present), measure resistance where required, and upgrade conductors and connections to the current code edition adopted by your jurisdiction. | We inspect the grounding electrode system during the rough-in and bring it to current code if any element is deficient. | Grounding is fine if the panel is bonded. |
| Which circuits in the new panel will require AFCI or GFCI protection, and what code edition are you applying? | We apply the California Electrical Code edition currently adopted by your local AHJ (the California Electrical Code is based on the NEC with California amendments). We itemize AFCI-required and GFCI-required circuits and price the AFCI/GFCI breakers separately so the homeowner sees the cost driver. | We apply AFCI and GFCI rules per the current adopted code edition and confirm exact requirements during permit submittal. | AFCI rules are confusing, so we skip them. |
| Will the quote include whole-home surge protection, and which type? | We recommend a Type 2 surge protective device (SPD) integrated with the new panel as a standard line item; Type 1 SPD at the service entrance is an upgrade option for homes with frequent utility-side transients. We explain warranty terms and replacement procedure after a major surge event. | We include a Type 2 SPD with the panel and price a Type 1 SPD upgrade separately. | Surge protection is unnecessary. |
| Does the existing panel location meet current code clearances, or do we need to relocate it? | We measure NEC Article 110 working-clearance requirements (depth in front of the panel, clear width, headroom) and confirm the panel is not behind cabinets, in clothes closets, or in other prohibited locations. If the location does not meet current code, we quote the relocation. | We verify clearance during the site visit and quote relocation only if the current spot does not meet code. | The existing spot is fine because the old panel fit. |
| Will you use conduit or NM cable for the new circuits, and how do you decide? | We follow the California Electrical Code wiring methods permitted for residential occupancies. Conduit is required for exterior runs and where physical damage is likely; NM cable is permitted in many concealed interior runs. We size conductors for the future load, not just today's circuit. | We follow code wiring methods and explain any conduit upgrades that affect the price. | Whatever is easiest and cheapest. |
| Who pulls the electrical permit at the local AHJ (city or county permit center), and is the fee itemized in your quote? | We pull the electrical permit at the local AHJ in our own name, attend the inspection, and itemize the permit fee in the quote. We do not ask the homeowner to pull the permit. | We pull the permit at the local AHJ and break out the fee on the quote. | We do not pull permits because they slow the job. |
| Walk us through the inspection process: which inspections are required and what does each one check? | We typically schedule a rough-in inspection (panel mounted, grounding electrode system verified, conductors run) and a final inspection (devices terminated, AFCI/GFCI verified under test, labeling complete). The exact sequence depends on the local AHJ. | We confirm the inspection sequence with the AHJ at permit submittal and update the homeowner on the schedule. | There is just one inspection at the end. |
| How long will the home be without power during the panel swap, and what time of day will it occur? | A panel-only swap typically takes 6 to 10 hours; a service upgrade with meter swap can take a full day and is constrained by the utility's window. We confirm the exact window and time-of-day with the utility before scheduling. | We give a window once the utility confirms the meter swap appointment. | Will not take long. |
| Will the new panel be sized and labeled for future solar or battery interconnection per NEC Article 705.12? | Yes. We size the busbar and main breaker so the future solar PV and battery interconnection meets NEC Article 705.12 (the 120% rule or supply-side connection, depending on the configuration). We document the headroom available so the future installer can verify quickly. | We confirm Article 705.12 compatibility during design and note the calculated headroom on the panel schedule. | Solar and battery do not affect panel sizing. |
| If we may add a generator interlock or transfer switch later, what should the new panel design account for? | We can include a generator interlock kit with the panel install, or pre-wire space for a future automatic transfer switch. Interlock is the lowest-cost option for occasional backup; ATS is the right path for whole-home automatic backup. | We pre-wire space for a future interlock or transfer switch if requested, and note it on the panel schedule. | Generator readiness is a future problem. |
| How are you treating the federal §25C tax credit for panel-upgrade work? | The federal §25C Energy Efficient Home Improvement Credit expired December 31, 2025 under OBBBA (PL 119-21). For panel work performed in 2026 and later, we do not list §25C as an applicable credit and we will not claim eligibility. | We confirm the current federal-credit status against the IRS guidance at quote time and update the homeowner. | You qualify for the 30 percent federal tax credit on panel work. |
| Is panel-upgrade work eligible for HEEHRA (Home Electrification and Appliance Rebates) in California, and what is the current funding status? | Panel-upgrade work, sub-panel additions, and electrical wiring needed to support qualifying electrification projects can be eligible HEEHRA expenses for income-qualified households. CPUC reported HEEHRA funds fully reserved earlier this year, so we do not promise current availability and confirm against the CPUC HEEHRA portal at quote time. | We share the current HEEHRA funding status from the CPUC portal and adjust the incentive line items accordingly. | HEEHRA covers all panel upgrades automatically. |
| Are there TECH Clean California, CCA (Community Choice Aggregator), or utility-side incentives that apply to this panel work? | TECH Clean California is statewide for qualifying heat-pump installations; panel-upgrade work tied to a qualifying heat pump may be eligible. Many CCAs (such as MCE, SVCE, CleanPowerSF, SJCE) and IOUs run their own electrification rebates with panel-work eligibility. We confirm the program rules in writing before the quote and list each program with its reservation status. | We confirm current eligibility with each named program and document the reservation status on the quote. | All rebates are guaranteed if you sign today. |
| What is the manufacturer warranty on the new panel, breakers, and any smart-panel hardware? | We list the manufacturer warranty for the panel and main breaker (typically 10 years), branch-circuit breakers (typically 1 to 10 years), and smart-panel hardware separately. We explain what voids each. | We attach the manufacturer warranty documents with the quote. | Warranty is whatever the box says. |
| What is your labor warranty on the panel installation, and does it cover related troubleshooting? | We offer a written labor warranty (typically 1 to 5 years) covering workmanship on terminations, conduit runs, and grounding work. We explain what is covered and what is not. | We include a written labor warranty with the quote and explain the covered scope. | Our work is good, no warranty needed. |
| Based on the Article 220 result, what do you recommend as the best next action and why? | We propose a single recommended option with the load-calc rationale, list one alternative with the cost delta, and explain what would change our recommendation. We are clear about which costs are firm and which depend on the utility or AHJ. | We summarize the recommendation in writing after the site visit and load calc. | Whatever you want is fine. |
Green flags, reasonable caveats, red flags
Green flags
- Shared NEC 220 load calc across all future loads (HP HVAC plus HPWH plus EV plus battery)
- Single project lead coordinating City of SD DSD permits plus SDG&E coordination plus tile or WUI handling
- Sequenced phased plan with panel-capacity gating
- SDAPCD Rule 69.5.1 NOx limits checked on any retained gas appliance
- Backup-loads list drives battery plus inverter sizing
- Current SGIP budget status verified at sgipsd.org / selfgenca.com (CSE administrator) before quoting: only AB 209-funded RSSE remains open to new applications in 2026 and that budget is fully reserved with new apps on a waitlist served via attrition; ratepayer-funded General Market / Equity / Equity Resiliency budgets are no longer accepting new applications. RSSE waitlist position documented; TECH and HEEHRA listed only at current reservation status
Reasonable caveats
- Phased work means multiple SD DSD permit cycles
- Site visit cost may not credit toward later phases
- Rebate stacking timing matters (TECH and HEEHRA both waitlisted; SGIP RSSE waitlist order)
- Per-phase pricing may shift after site visit
Red flags
- Quotes whole-home lump-sum with no per-phase pricing
- Recommends solar or battery before panel-capacity verification
- Skips Manual J for HVAC sizing
- Promises stacking without confirmed reservations
- Claims §25C or §25D credits apply to 2026+ work
Quote checklist
Check every item before signing.
Required
Optional but recommended
Quote comparison worksheet
Print this and fill in by hand, or capture quotes side-by-side as you receive them.
| Line item | Contractor 1 | Contractor 2 | Contractor 3 |
|---|---|---|---|
| Quote includes heat pump HVAC equipment model, capacity (tons / BTU), efficiency ratings (SEER2 / HSPF2), and warranty. (required) | |||
| Quote includes a Manual J load calculation, or commits to performing one before final sizing. (required) | |||
| Quote includes a duct inspection, return-air assessment, and any duct modifications needed. (required) | |||
| Quote includes electrical panel/service assessment and any load-calculation requirements. (required) | |||
| Quote explains whether a panel upgrade, service upgrade, or smart load management is needed. (required) | |||
| Quote separates confirmed incentives from assumed or maybe incentives with reservation requirements noted. (required) | |||
| Quote notes the refrigerant type and confirms it meets current EPA rules (R-454B / R-32 for systems installed after the A2L transition). | |||
| Quote notes the heat pump's published HSPF2 / COP at local design temperature and whether backup heat is required. (required) | |||
| Quote includes a startup / commissioning procedure: charge verification, airflow measurement, static pressure check. | |||
| Quote specifies the labor warranty (in addition to manufacturer parts warranty) and what voids each. | |||
| Quote names whether SDAPCD Rule 69.5.1 NOx limit affects any gas appliance involved in the replacement. (required) | |||
| Quote acknowledges the SD coastal-vs-inland sizing assumption (Lindbergh Field coastal vs East County inland) used in Manual J. (required) | |||
| Quote names who pulls the City of SD DSD mechanical and electrical permit (opendsd.sandiego.gov) and itemizes the fee. (required) | |||
| Quote specifies model, capacity (gallons), first-hour rating, and UEF efficiency. (required) | |||
| Quote includes a location assessment with air volume calculation or ducting plan. (required) | |||
| Quote includes condensate drain routing and overflow safety per CPC. (required) | |||
| Quote includes the new dedicated electrical circuit, sized per manufacturer specs (conductor gauge and breaker rating itemized). (required) | |||
| Quote includes gas line decommissioning per CPC (capping and labeling) when replacing a gas tank. (required) | |||
| Quote notes the unit's decibel rating and how the install location affects living-area noise. | |||
| Quote specifies the manufacturer warranty (typically 10 years tank) and labor warranty separately. | |||
| Quote separates confirmed incentives from assumed incentives with program ID and reservation status. (required) | |||
| Quote names whether SDAPCD Rule 69.5.1 NOx limit applies if a gas water heater is being kept as a fallback. | |||
| Quote names the current TECH and HEEHRA reservation status (both waitlisted as of last verification) and does not assume them as confirmed savings. (required) | |||
| Quote names who pulls the City of SD DSD mechanical and electrical permits and itemizes the fees. (required) | |||
| Quote specifies charger model, continuous amperage rating, and connector type (J1772 / NACS). (required) | |||
| Quote includes an Article 220 load calculation confirming panel and service capacity. (required) | |||
| Quote addresses whether smart load management (Span, Emporia, charger-side) can avoid a panel/service upgrade. | |||
| Quote lists conduit routing (interior / attic / exterior / trench) with linear footage and per-foot incremental cost. (required) | |||
| Quote explains the final inspection process including who is present and when final payment is due. (required) | |||
| Quote confirms grounding and bonding meet Article 250, including any service-ground updates. (required) | |||
| Quote notes whether the install supports a future second EV via load-sharing or pre-pulled conductors. | |||
| Quote separates manufacturer hardware warranty from installer labor warranty with terms for each. (required) | |||
| Quote includes an SDG&E EV-TOU-5 vs TOU-DR1 cost model based on 12 months of usage. (required) | |||
| Quote names who pulls the City of SD DSD electrical permit (opendsd.sandiego.gov) and itemizes the fee. (required) | |||
| Quote names whether the address sits in a Very High Fire Hazard Severity Zone and documents the CRC R327 / R337 conduit-material choice if so. | |||
| Quote models future load (heat pump, EV, water heater) for sizing, not just past consumption. (required) | |||
| Quote uses NEM 3.0 export rates and explicitly notes the change from NEM 2.0. (required) | |||
| Quote includes roof condition assessment with remaining lifetime estimate. (required) | |||
| Quote specifies panel and inverter brand, wattage, efficiency, and warranty. (required) | |||
| Quote includes a shading analysis and string or microinverter design notes. (required) | |||
| Quote states the production guarantee (kWh/year) and how it is enforced. | |||
| Quote names the monitoring platform and any subscription cost. | |||
| Quote names who handles PG&E interconnection paperwork. (required) | |||
| Quote separates confirmed incentives from assumed with reservation status. (required) | |||
| Quote includes a 12-month production model with SD coastal-vs-inland microclimate assumption noted. (required) | |||
| Quote notes whether SolarAPP+ streamlined permitting through SD DSD applies. | |||
| Quote names the racking type used for clay or concrete tile roofs (tile-hook flashing or tile-replacement bracket) if the roof is Spanish-tile. | |||
| Quote states usable kWh (not just nameplate) and continuous AC inverter output. (required) | |||
| Quote includes a backup-loads list with runtime estimates. (required) | |||
| Quote states whether the battery is AC-coupled or DC-coupled with the solar array. (required) | |||
| Quote states current SGIP budget status (as of 2026, ratepayer-funded General Market / Equity / Equity Resiliency budgets are no longer accepting new applications; only AB 209-funded RSSE remains open and that budget is fully reserved with new apps on a waitlist served via attrition) and any RSSE waitlist application reference if pursued. (required) | |||
| Quote confirms compliance with CRC 1207 / R327 fire setback rules for the chosen install location. (required) | |||
| Quote specifies battery warranty (years, cycles, throughput) and labor warranty separately. (required) | |||
| Quote names the battery monitoring platform and any user-side controls (time-of-use scheduling, backup-mode toggle). | |||
| Quote names who handles PG&E interconnection updates for the battery. (required) | |||
| Quote explains the SGIP RSSE waitlist application workflow and timeline before equipment is delivered (RSSE is the only SGIP tier accepting new applications as of 2026, and its budget is fully reserved with new apps on a waitlist served via attrition). | |||
| Quote names the SGIP path pursued via CSE (sgipsd.org / selfgenca.com): RSSE waitlist if income-qualified solar plus battery; otherwise no SGIP path is available in 2026 because the ratepayer-funded budgets are no longer accepting new applications. Includes any RSSE waitlist reference number. (required) | |||
| Quote names who pulls the City of SD DSD electrical permit and itemizes CRC R327 / R337 fire-setback measurements. (required) | |||
| Quote includes a year-1 self-consumption and cost model under SDG&E NEM 3.0 with and without battery. (required) | |||
| Quote includes an NEC Article 220 load calculation accounting for current connected loads and planned future loads (heat pump, heat pump water heater, EV charger, induction range, battery). (required) | |||
| Quote states whether this is a service upgrade or panel-only replacement and the load-calc rationale behind the choice. (required) | |||
| Quote names the recommended service amperage (e.g. 200A or 225A) and the calculated headroom remaining after the planned future loads. (required) | |||
| Quote names who coordinates with the serving utility (PG&E, SCE, SDG&E, LADWP, SMUD, or other) and documents the expected utility lead time. (required) | |||
| Quote names who pulls the electrical permit at the local AHJ and itemizes the permit fee. (required) | |||
| Quote confirms AFCI and GFCI breaker requirements per the California Electrical Code edition currently adopted by the local AHJ and itemizes the AFCI / GFCI breaker cost separately. (required) | |||
| Quote includes inspection of the grounding electrode system and any conductor or connection upgrades required for the new panel. (required) | |||
| Quote confirms that the new panel busbar and main breaker are sized to support future solar PV or battery interconnection per NEC Article 705.12. (required) | |||
| Quote states the expected utility downtime window during the panel swap and the time-of-day window the utility has confirmed. (required) | |||
| Quote includes whole-home surge protection (Type 2 SPD integrated with the panel) and prices a Type 1 SPD upgrade separately. | |||
| Quote explains whether a smart panel (Span, Lumin, Eaton EV Choice) is appropriate versus a standard load center, with cost delta and tradeoffs. | |||
| Quote separates confirmed CA incentives (HEEHRA, TECH Clean California, IOU, CCA, municipal-utility programs) from assumed incentives with reservation status, and reflects current CPUC funding status for HEEHRA. (required) |
Incentive verification worksheet
| Program | Amount | Eligibility | Pre-approval? | Confidence | Verified | Source |
|---|---|---|---|---|---|---|
| Section 25C Energy Efficient Home Improvement Credit (heat pumps) | Expired Dec 31, 2025. For 2023–2025: up to $2,000/yr (30% of project cost, capped) for qualifying heat pumps and heat pump water heaters. | EXPIRED: This federal credit ended Dec 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Installations completed in 2026 or later do not qualify, regardless of when payment was made. For installations completed during 2023–2025, the credit applied to U.S. primary residences with heat pumps or heat pump water heaters that met or exceeded the highest CEE efficiency tier in effect at the start of the install year; starting 2025, the manufacturer's Qualified Manufacturer Identification Number (QMID) was required on the tax return. Homeowners with eligible 2025 installations may still claim the credit on their 2025 federal tax return. Verify with a qualified tax professional. | Verify | high | 2026-05-30 | Internal Revenue Service, Internal Revenue Service, ENERGY STAR (EPA/DOE) |
| Section 25C Energy Efficient Home Improvement Credit (electrical panel upgrade) | Expired Dec 31, 2025. For 2023–2025: up to $600 (30% of project cost, capped) when paired with a qualifying 25C electrification project. | EXPIRED: This federal credit ended Dec 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Installations completed in 2026 or later do not qualify, regardless of when payment was made. For installations completed during 2023–2025, the credit applied to electrical panel upgrades installed consistent with the National Electric Code, with a load capacity of at least 200 amps, installed in conjunction with (and enabling) a qualifying energy efficiency improvement or specific energy property (heat pump, heat pump water heater, central AC, water heater, furnace, boiler, or biomass stove/boiler). The credit fell under the $1,200 annual envelope cap. Homeowners with eligible 2025 installations may still claim the credit on their 2025 federal tax return. Verify with a qualified tax professional. | Verify | high | 2026-05-30 | Internal Revenue Service, Internal Revenue Service, ENERGY STAR (EPA/DOE) |
| Section 25D Residential Clean Energy Credit (solar PV) | Expired Dec 31, 2025. For 2023–2025: 30% of total installed cost, no cap. | EXPIRED: This federal credit ended Dec 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Expenditures made after Dec 31, 2025 do not qualify — for §25D, the IRS treats the expenditure date as the date the installation is placed in service (completed), not the date of payment. A homeowner who paid a deposit in 2025 but whose system was placed in service in 2026 does not qualify. For installations placed in service during 2023–2025, the credit applied to solar PV systems supplying electricity to a U.S. residential dwelling used by the taxpayer as a residence (principal residence not required; second homes qualified; rentals not occupied by the taxpayer did not qualify), satisfying applicable fire and electrical codes, with installation costs included in the credit basis. The credit was nonrefundable with carryforward. Homeowners with eligible 2025 placed-in-service installations may still claim the credit on their 2025 federal tax return. Verify with a qualified tax professional. | Verify | high | 2026-05-30 | Internal Revenue Service, Internal Revenue Service, ENERGY STAR (EPA/DOE) |
| Section 25D Residential Clean Energy Credit (battery storage) | Expired Dec 31, 2025. For 2023–2025: 30% of total installed cost, no cap (battery capacity at least 3 kWh). | EXPIRED: This federal credit ended Dec 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Expenditures made after Dec 31, 2025 do not qualify — for §25D, the IRS treats the expenditure date as the date the installation is placed in service (completed), not the date of payment. A homeowner who paid a deposit in 2025 but whose system was placed in service in 2026 does not qualify. For installations placed in service during 2023–2025, the credit applied to battery storage systems with a rated capacity of at least 3 kilowatt-hours installed in a U.S. home used by the taxpayer as a residence (existing homes and new construction; principal residence not required; rentals not occupied by the taxpayer did not qualify). Standalone batteries (not paired with solar) were explicitly eligible from Jan 1, 2023 onward. The credit was nonrefundable with carryforward. Homeowners with eligible 2025 placed-in-service installations may still claim the credit on their 2025 federal tax return. Verify with a qualified tax professional. | Verify | high | 2026-05-30 | Internal Revenue Service, Internal Revenue Service, ENERGY STAR (EPA/DOE) |
| California Self-Generation Incentive Program (SGIP) — residential battery storage | As of 2026-06-08, only the Residential Solar and Storage Equity (RSSE) AB 209 budget remains open for new applications, and that budget is fully reserved — new applications are placed on a waitlist served through attrition of cancelled projects. Per-kWh rates by tier (for context — only RSSE accepts new apps in 2026): RSSE $1,100/kWh storage + $3,100/kW solar; Equity Resiliency $1,000/kWh; Equity $850/kWh; San Joaquin Valley Residential $1,100/kWh; Small Residential Storage / General Market $150/kWh. Per-project totals depend on installed battery capacity (kWh) and tier eligibility. | Administered by the California Public Utilities Commission (CPUC) and delivered through utility program administrators (PG&E, Center for Sustainable Energy / SDG&E territory, SoCalGas, SCE; LADWP customers are not eligible). Budget status as of 2026-06-08: per SGIP program administrator (CSE / sgipsd.org), 'as of December 31, 2025, all new application submissions are strictly available to the Residential Solar and Storage Equity (RSSE) AB 209 budget. At this time, all available RSSE AB 209 funding has been reserved.' New RSSE applications are placed on a waitlist in order received and funded through attrition of cancelled projects. The ratepayer-funded General Market, Equity, and Equity Resiliency budgets are not accepting new applications. Tier rates for reference (applicable to reservations made while budgets were open): (1) Residential Solar and Storage Equity (RSSE) — $1,100/kWh storage plus $3,100/kW solar; low-income residential customers; AB 209-funded; reservation window opened June 2, 2025. (2) Equity Resiliency — $1,000/kWh; IOU residential customers in high fire-threat districts and/or medical baseline / income-qualified. (3) Equity — $850/kWh; income-qualified IOU residential customers. (4) San Joaquin Valley Residential — $1,100/kWh; PG&E and SCE pilot footprint. (5) Small Residential Storage / General Market — $150/kWh. Reservations require a one-year completion window and enrollment in a qualified Demand Response program. Tier eligibility, income documentation, HFTD-tier residency, and budget-availability status must be verified against the current SGIP Handbook and the customer's utility administrator before any contractor work begins. | Yes | high | 2026-06-08 | California Public Utilities Commission (CPUC) |
| California Home Electrification and Appliance Rebates (HEEHRA) — single-family | When available, up to $8,000 (households below 80% AMI) or $4,000 (80–150% AMI) for a qualifying heat pump HVAC system, with additional rebates for heat pump water heaters, electrical panel upgrades, and wiring inside the per-household envelope. Phase I single-family funds are currently fully reserved (waitlist active). | PROGRAM STATUS: Single-family Phase I is FULLY RESERVED statewide as of 2026-02-24 — new single-family applications are not being accepted and a waitlist is in place. Multifamily applications remain open. Phase II is under development pending DOE approval. HEEHRA is California's implementation of the federal IRA Home Electrification and Appliance Rebates program, administered by the California Energy Commission (CEC) with single-family implementation through TECH Clean California. When open, eligibility requires income-qualified single-family homeowners (or landlords with income-qualified tenants) at or below 150% of Area Median Income; income tiers determine rebate amount (below 80% AMI vs 80–150% AMI). Projects must obtain an approved reservation before installation; rebates only apply to heat pumps installed after the reservation is approved. Income verification is required before a contractor can submit a reservation. Replacement of an existing non-heat-pump space heating system is required for the HVAC rebate. Homeowners should check techcleanca.com and the CEC IRA rebate page for re-opening announcements before signing a contract. | Yes | high | 2026-06-08 | California Energy Commission (CEC), California Energy Commission (CEC) / Energy Solutions |
| TECH Clean California — heat pump HVAC incentive (single-family, market-rate) | Currently unavailable: single-family heat pump HVAC incentives are fully reserved as of 2026-05-30. Historical incentive amounts varied by utility service territory and customer income tier — verify against techcleanca.com for re-opening announcements. | PROGRAM STATUS: Single-family heat pump HVAC incentives are FULLY RESERVED as of 2025-11-14 — new single-family reservations are not being accepted. Multifamily program activity continues. TECH Clean California is a statewide CEC initiative administered by Energy Solutions under contract with Southern California Edison on behalf of California utilities under CPUC oversight, designed to accelerate adoption of clean space and water heating. When open, single-family eligibility requires the homeowner to be a customer of a participating California utility, the installation to use an enrolled TECH contractor (1,600+ contractors enrolled statewide), and the project to obtain a reservation before installation. Specific dollar amounts varied by service territory and income tier — refer to techcleanca.com for the next-funded round's amounts and any income-qualified bonus structure. Homeowners should not assume an incentive is available; verify current reservation status with techcleanca.com before signing a contract. | Yes | high | 2026-06-08 | California Energy Commission (CEC) / Energy Solutions, California Energy Commission (CEC) / Energy Solutions |
| TECH Clean California — heat pump water heater incentive (single-family, market-rate) | Currently unavailable: single-family heat pump water heater incentives are fully reserved as of 2026-05-30. Service-area-specific funds were fully reserved between May 2024 and February 2025; the November 2025 round is also fully reserved. Historical incentive amounts varied by utility service territory and customer income tier — verify against techcleanca.com for re-opening announcements. | PROGRAM STATUS: Single-family heat pump water heater incentives are FULLY RESERVED as of 2025-11-14 — new single-family reservations are not being accepted. Service-area-specific incentives were fully reserved between May 2024 and February 2025; subsequent rounds have also exhausted. TECH Clean California is a statewide CEC initiative administered by Energy Solutions under CPUC oversight. When open, single-family eligibility requires the homeowner to be a customer of a participating California utility, the installation to use an enrolled TECH contractor, and the project to obtain a reservation before installation. Specific dollar amounts varied by service territory. Homeowners should not assume an incentive is available; verify current reservation status with techcleanca.com before signing a contract. Income-qualified homeowners may be routed to HEEHRA instead (also currently fully reserved for single-family). | Yes | high | 2026-06-08 | California Energy Commission (CEC) / Energy Solutions, California Energy Commission (CEC) / Energy Solutions |
| California Net Billing Tariff (NEM 3.0) — solar export compensation framework | Policy framework, not a direct rebate. Excess solar generation exported to the grid is compensated at a rate reflecting the time-varying grid value of that generation (Avoided Cost Calculator methodology), rather than at the retail electricity rate that NEM 2.0 used. Net export compensation under the Net Billing Tariff is typically materially lower than under NEM 2.0; pairing solar with battery storage may materially affect project economics under this framework. | POLICY IN EFFECT — NOT A REBATE: The Net Billing Tariff (NBT), commonly called 'NEM 3.0,' is the current Net Energy Metering framework for new residential solar interconnections in California, adopted by CPUC Decision 22-12-056 and effective for applications submitted on or after 2023-04-15. It applies to new customer-generator interconnections in the three large investor-owned utility territories: Pacific Gas and Electric (PG&E), Southern California Edison (SCE), and San Diego Gas & Electric (SDG&E). LADWP and other publicly owned utilities operate their own net-metering tariffs and are not covered by NBT. Under NBT, onsite solar generation first offsets the customer's own consumption; excess generation exported to the grid is compensated at a time-varying export rate based on the grid's avoided cost rather than the retail rate. Existing NEM 1.0 / NEM 2.0 customers are generally grandfathered under the legacy tariff for a defined period from their original interconnection date — verify against the customer's utility for the legacy term. Homeowners considering new residential solar in PG&E / SCE / SDG&E territory should model project economics specifically under NBT, with and without paired battery storage, before signing a contract. | Interconnection application required, not a financial preapproval. | high | 2026-05-30 | California Public Utilities Commission (CPUC) |
| California Equitable Building Decarbonization (EBD) Direct Install Program | No-cost direct-install upgrades for income-qualified households — homeowner does not pay out-of-pocket for covered measures. Measures may include heat pump HVAC, heat pump water heater, induction stove, electrical panel upgrade, and weatherization, subject to a per-household scope set by the regional implementer. | Administered by the California Energy Commission (CEC) as the statewide Equitable Building Decarbonization Direct Install Program, with delivery through regional implementers and a separate Tribal Direct Install track. Targets low- and moderate-income households in low-income communities; specific AMI thresholds and per-region eligibility rules are set by the regional implementer rather than statewide. Both single-family homeowners and renters in eligible buildings may qualify, though scope and contractor selection are determined by the implementer (homeowners do not freely choose contractors). The program is funded through California IRA HOMES funding (60% allocation to Direct Install, approximately $130.3M) plus state appropriations. Direct Install retrofits began rolling out in summer 2025. Homeowners interested in EBD should contact the CEC at equitablebuildingdecarb@energy.ca.gov or watch for their regional implementer's launch announcement; the program does not accept open online applications the way TECH or HEEHRA do. | Yes | medium | 2026-05-30 | California Energy Commission (CEC), California Energy Commission (CEC) |
| Section 30C Alternative Fuel Vehicle Refueling Property Credit (residential EV charger) | Had a statutory cliff on June 30, 2026. For property placed in service Jan 1, 2023 – June 30, 2026: 30% of the cost of qualifying residential EV charging property, up to $1,000 per item (per charging port, fuel dispenser, or storage property), claimed on IRS Form 8911. Only homes located in a qualifying low-income community or non-urban census tract may have qualified. Installations placed in service after June 30, 2026 do not qualify. | §30C federal EV-charger credit had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21, 139 Stat. 72, signed July 4, 2025). Under the statute, the credit 'will not be allowed for any property placed in service after June 30, 2026.' This was a cliff termination with no transition rate — installations placed in service on July 1, 2026 or later do not qualify, regardless of when payment or contracting occurred. For property placed in service Jan 1, 2023 through June 30, 2026, the credit covered 30% of the cost of qualifying alternative fuel vehicle refueling property installed at a U.S. home used by the taxpayer as a main home, capped at $1,000 per item (the cap applied separately to each charging port, fuel dispenser, or storage property). Property had to have original use beginning with the taxpayer. Census-tract eligibility was the load-bearing constraint: per IRS guidance, the property had to be installed in a low-income community census tract or non-urban census tract — 2015 Census Tract boundaries applied to installations placed in service before Jan 1, 2025; 2020 Census Tract boundaries applied to installations placed in service on or after Jan 1, 2025. Many urban high-income census tracts did not qualify even where the homeowner installed an otherwise eligible charger. Homeowners claimed the credit on Form 8911 attached to their federal tax return. Pre-cliff installs may have qualified — verify both the placed-in-service date and the census-tract eligibility of the install address with a qualified tax preparer before relying on this credit. | Verify | high | 2026-06-08 | Internal Revenue Service, Internal Revenue Service |
| SDG&E Energy Savings Assistance Program (ESA) — income-qualified no-cost upgrades | No-cost (program-funded) upgrades for eligible households. ESA Basic Plus measures include attic insulation, envelope and air sealing, duct sealing, heat pump water heaters, water heater repair/replacement, gas furnace repair/replacement, refrigerator, clothes washer/dryer, room AC, whole house fans, and smart thermostats. | As of 2026-05-30 the program is actively accepting applications. Eligibility is income-based; effective July 1, 2025 through May 31, 2026, ESA income limits run up to 250% of the Federal Poverty Guidelines (approximately $80,375 maximum combined annual income for a family of four). Categorical eligibility is available via Medi-Cal, CalFresh, SSI, CalWORKs, LIHEAP, and similar assistance programs. Both homeowners and renters in buildings with four or fewer units may qualify (renters may need landlord permission for some measures). Verify current thresholds and the qualifying-measure list at the program page before applying. | Yes — an in-home assessment by an SDG&E-authorized energy specialist determines which measures are installed. | high | 2026-05-30 | San Diego Gas & Electric |
| Golden State Rebates — Heat Pump Water Heater (SDG&E-served homes) | Up to $500 instant rebate (currently listed on SDG&E's residential rebates index as of 2026-05-30; the multi-IOU Golden State Rebates HPWH category has been paused at other IOUs at various points — verify current status before purchase) | As of 2026-05-30 the $500 heat pump water heater rebate appears on SDG&E's residential rebates index. Golden State Rebates is a multi-IOU statewide instant-rebate program operated by CLEAResult on behalf of PG&E, SCE, SDG&E, and SoCalGas; the program is scheduled to sunset June 30, 2026 or earlier if state funds run out. Pacific Gas & Electric and Southern California Edison records currently note that the multi-IOU HPWH category is temporarily unavailable in their territories; the apparent SDG&E listing may reflect a utility-specific budget allocation or a stale page state — verify current category status and qualifying-product list at goldenstaterebates.com and at sdge.com/rebates before purchasing. Equipment must meet specified UEF and tank-size requirements (e.g., 45-55 gallon heat pump water heaters with UEF >= 3.30 when replacing an electric water heater). | Instant rebates are typically applied at point of sale through participating distributors; verify current process at the program site. | medium | 2026-05-30 | San Diego Gas & Electric, California IOU Statewide Rebate Program (PG&E, SCE, SDG&E, SoCalGas) / CLEAResult |
| SDG&E Residential EV Charger Rebate — current status | Not currently available as a standalone SDG&E rebate for single-family Level 2 chargers. | As of 2026-06-08 SDG&E does not advertise a standalone residential Level 2 EV charger rebate for single-family homes. SDG&E's EV incentives page lists vehicle-side incentives (the SDG&E Pre-Owned EV Rebate at $1,000 standard or $4,000 income-qualified within a 180-day post-purchase window), state Clean Vehicle Rebate, federal EV tax credit, HOV stickers, and EV-specific rate plans, but no charger or panel-upgrade rebate for single-family homeowners. SDG&E's Power Your Drive program — historically the EV charging infrastructure path — covers only multi-unit dwellings, workplaces, and fleet customers, and the apartments/condos and workplaces tracks are reported to be fully subscribed. Single-family homeowners installing a Level 2 charger should look to: (a) the federal Section 30C credit — which had a statutory cliff on June 30, 2026 (OBBBA Public Law 119-21); pre-cliff installs may have qualified in eligible census tracts; see federal-30c-ev-charger — (b) EV-specific rate plans for ongoing operating cost reduction (see the SDG&E utility record), and (c) third-party programs that may emerge. Re-check quarterly in case SDG&E launches a single-family charger rebate. | Verify | high | 2026-05-30 | San Diego Gas & Electric, San Diego Gas & Electric |
| SDG&E Heat Pump HVAC Rebate — current status | Not currently available as a standalone universal SDG&E rebate. Income-qualified homeowners in qualifying zip codes may qualify through the ESA Whole Home Pilot (narrow track) — see eligibility_summary for routing. | As of 2026-05-30 SDG&E does not advertise a standalone universal residential heat-pump HVAC rebate on its rebates index. SDG&E's electrification landing page routes homeowners to external programs (Golden State Rebates, The Switch Is On, SGIP HPWH path, federal IRA programs) rather than to an SDG&E-administered HVAC rebate. Heat-pump HVAC paths for SDG&E customers in 2026 are: (a) HEEHRA-CA (single-family fully reserved since February 24, 2026; see ca-heehra-single-family), (b) TECH Clean California (single-family fully reserved since November 14, 2025; see ca-tech-heat-pump-hvac), and (c) a narrow income-qualified track via the ESA Whole Home Pilot — administered by MAROMA, statewide cap of 250 customers, zip-code-gated, first-come-first-served, covering up to roughly $25,000 in upgrades including heat pump HVAC and central A/C. Homeowners who don't qualify for HEEHRA, TECH, or the Whole Home Pilot must wait for state programs to reopen or use third-party regional programs. | Verify | high | 2026-05-30 | San Diego Gas & Electric, San Diego Gas & Electric |
Permit verification worksheet
| Permit | Jurisdiction | Applies to | Confidence | Verified | Source |
|---|---|---|---|---|---|
| Mechanical + electrical permit | city | Heat Pump HVAC | high | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego |
| Plumbing + electrical permit | city | Heat Pump Water Heater | high | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego |
| Electrical permit | city | Electrical Panel Upgrade | medium | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego |
| Electrical + building permit | city | Solar Panels | medium | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego, City of San Diego, City of San Diego |
| Electrical + building permit | city | Battery Storage | medium | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego, City of San Diego |
| Electrical permit | city | EV Charger Installation | high | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego, City of San Diego |