Solar in San Francisco, CA: 2026 Cost, Savings & Payback
Calculate 2026 solar panel cost, payback, and 25-year bill savings in San Francisco, California. Based on an estimated 5.3 peak sun hours/day, a 26.5¢/kWh planning electricity rate, Pacific Gas & Electric (PG&E) as the likely utility, and current IRS guidance for the ended federal residential clean energy credit.
Solar in San Francisco, CA: quick answer
A typical 6kW solar system in San Francisco costs about $18,540 before local or state incentives. For 2026 installs, the federal residential clean energy credit is modeled as $0, so the estimated cost remains about $18,540 before any local incentive. It produces about 9,286 kWh per year from 5.3 peak sun hours/day, saves about $2,456 per year, and reaches payback in about 7.5 years.
2026 6kW Cost
$18,540
Monthly Savings
$205
Production / kW
1,548 kWh
Panel Count
~15
5.3
Peak Sun Hours/Day
26.5¢
Planning Rate (¢/kWh)
7.5 yr
Payback Period
$59k
25-Year Savings
San Francisco Solar Overview
Calculate Your San Francisco Solar Savings
San Francisco average: $157/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
no 2026 federal credit applied
Payback Period
break-even time
Bill Offset and Export Assumptions
Current Annual Bill
$1,884
Estimated Usage
7,123 kWh
Bill Offset
92%
Used On Site
77%
Exported production is discounted in this planning model instead of being treated as a guaranteed one-for-one bill credit. For San Francisco, verify the current Pacific Gas & Electric (PG&E) export-credit method and any fixed monthly charges before relying on the payback number.
25-Year Total Savings
$59,195
Monthly Savings
$144
2026 Federal Credit
$0
Cumulative Savings vs System Cost
Cost Breakdown
| Item | San Francisco | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $18,540 | $17,100 |
| 2026 Federal Residential Credit | -$0 | $0 |
| Net System Cost | $18,540 | $17,100 |
| Cost Per Watt | $3.09/W | $2.85/W |
Solar Potential in San Francisco
Sun Hours vs National Average
San Francisco gets 18% more sun than the national average.
Climate Advantages
- About 275 sunny days per year (planning estimate)
- Estimated average temperature: 67.2°F, moderate climate with good solar conditions
- Assumed roof size: 2,077 sq ft, enough for a 115-panel system
San Francisco Solar Incentives & Programs
Federal Residential Clean Energy Credit (Section 25D)
For 2026 planning, JouleIO does not subtract a federal residential clean energy credit. The IRS says the Residential Clean Energy Credit was 30% for eligible property installed from 2022 through December 31, 2025, and is not available for property placed in service after December 31, 2025.
Source: IRS Residential Clean Energy Credit and IRS One Big Beautiful Bill provisions.
California State Incentives
California NEM 3.0 net billing; SGIP battery rebates up to $1,000/kWh
Net Metering: Pacific Gas & Electric (PG&E)
JouleIO's planning data marks net metering or a solar export credit as available for Pacific Gas & Electric (PG&E) customers in San Francisco. Export credits can be at retail or below-retail rates depending on the current tariff, so confirm terms with the utility that serves your address.
Environmental Impact in San Francisco
3.9
Tons CO2 Offset/Year
64
Equivalent Trees Planted
0.9
Homes Worth of Energy
Based on 9,286 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in San Francisco, California
San Francisco, California receives an average of 5.3 peak sun hours per day, providing excellent conditions for residential solar installations. With a planning electricity rate of 26.5¢ per kWh (EIA California residential average for 2026-06: 34.74¢; U.S. average 18.34¢), above the national average, solar savings potential is stronger.
A typical 6kW solar system in San Francisco produces approximately 9,286 kWh per year, saving homeowners an estimated $1,733 annually. The system pays for itself in about 10.7 years, after which you enjoy essentially free electricity for the remaining 14+ years of the system's warranty life.
JouleIO's dataset carries a modeled solar-adoption value of 7.9% for San Francisco. It is a rough planning placeholder, not a measured count of local installations, so use utility interconnection data or installer quotes if local adoption matters to your decision.
Other Cities in California
Anaheim, CA
Bakersfield, CA
Berkeley, CA
Chula Vista, CA
Clovis, CA
Concord, CA
Corona, CA
Daly City, CA
Downey, CA
El Cajon, CA
Elk Grove, CA
Escondido, CA
Methodology & Solar Data Sources for San Francisco
How we calculate San Francisco solar potential and savings: Annual production = system kW × estimated peak sun hours × 365 × 0.80 system derate × a roof-orientation factor. This is a simplified planning formula, not a PVWatts run for your address. Cost uses a planning price per watt for California, and bill savings use a planning electricity rate of 26.5¢/kWh (the EIA California residential average for 2026-06 is 34.74¢/kWh).
- Peak sun hours for San Francisco (5.3/day) are a planning estimate in the typical range for California, not a site-specific NREL NSRDB value. Enter your address in NREL PVWatts for a location-specific production estimate.
- System sizing defaults to a 6kW residential rooftop system with roughly 400W panels; adjust the size and monthly bill to match your home.
- Federal tax credit: modeled as 0% for 2026 residential installations because IRS guidance says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
- Exports are discounted rather than credited 1:1 at retail, because many utilities have shifted to net billing or avoided-cost export rates. Verify your utility's current tariff.
- 25-year savings assume a 2.5% annual electricity-rate increase and do not subtract panel degradation, inverter replacement, or maintenance.
Authoritative US solar data sources:
- NREL PVWatts Calculator, official US solar production estimator
- NREL National Solar Radiation Database, site-level solar irradiance data for checking your address
- IRS Residential Clean Energy Credit, 2026 federal residential credit status
- IRS One Big Beautiful Bill provisions, clean energy credit expiration overview
- DSIRE, State Solar Incentives, searchable database for California
- EIA Electric Power Monthly Table 5.6.A, California residential average price
- ENERGY STAR Solar, efficient solar product database
Solar Disclaimer: Solar savings vary based on roof orientation, shading, system quality, installer markup, financing terms, utility rate plan, and policy changes. Always get 3+ quotes from NABCEP-certified installers and review contracts carefully. Tax credit eligibility depends on tax liability, consult a tax professional.
Reviewed by Marcus Delacroix · Last updated 2026 · Sun-hour and rate inputs are planning estimates; EIA state rate period 2026-06
Frequently Asked Questions
How much do solar panels cost in San Francisco, CA?
The average cost of a 6kW solar panel system in San Francisco is approximately $18,540 before local or state incentives ($3.09/watt). For 2026 planning, this calculator does not subtract a federal residential clean energy credit because IRS guidance says the credit is not available for property placed in service after December 31, 2025. California NEM 3.0 net billing; SGIP battery rebates up to $1,000/kWh
How many solar panels do I need in San Francisco, CA?
A typical 6kW residential solar system in San Francisco needs about 15 panels if each panel is rated near 400 watts. That system produces about 9,286 kWh per year in this estimate, or roughly 1,548 kWh per installed kW before shading, roof orientation, and inverter losses are customized.
How many peak sun hours does San Francisco get?
JouleIO models San Francisco, CA at about 5.3 peak sun hours per day and roughly 275 sunny days per year. These are planning estimates, not site measurements, so check your exact address in NREL PVWatts. This is above the national average of 4.5 hours, making it an excellent location for solar energy.
What is the solar payback period in San Francisco?
The average solar payback period in San Francisco is approximately 7.5 years for a 6kW cash-price estimate before local or state incentives. After payback, your solar panels generate essentially free electricity for the remaining warranty life. Over 25 years, bill savings can reach about $83,891 before subtracting installation cost.
Does San Francisco have net metering?
JouleIO's planning data marks net metering or a solar export credit as available in San Francisco, where Pacific Gas & Electric (PG&E) is the likely utility (verify for your address). Export credits may be at retail or below-retail rates depending on the current tariff, and fixed monthly charges still apply.
Is solar worth it in San Francisco, CA in 2026?
Yes. With a 7.5-year estimated payback and about $83,891 in 25-year bill savings before installation cost, solar can be an attractive investment in San Francisco. For 2026 installs, JouleIO does not assume a federal residential credit; above-average electricity rates are the main financial drivers.