The two numbers that matter
Electricity price: 33.6¢/kWh, above the national state average of 19.3¢. Every kilowatt-hour your panels make replaces one you'd buy at this price, so higher prices mean faster payback.
Sunshine: 6.1 peak sun hours a day, more than the state average of 5.0. Each kW of panels here makes roughly 1,731 kWh a year after real-world losses.
Estimates by bill size
| Monthly bill | Usage | System | Cost | Year-1 savings | Payback | 25-yr net |
|---|---|---|---|---|---|---|
| $100/month | 298 kWh | 1.9 kW | $5,570 | $920 | 6 yrs | $25,730 |
| $150/month | 446 kWh | 2.8 kW | $8,360 | $1,380 | 6 yrs | $38,590 |
| $250/month | 744 kWh | 4.6 kW | $13,930 | $2,300 | 6 yrs | $64,310 |
Assumes $3.00/W installed, 90% usage offset, no federal tax credit, 3% yearly price rise and 0.5% yearly panel degradation. Sources: US Energy Information Administration (EIA), Electric Power Monthly, residential average price, July 2026; NREL PVWatts / NSRDB, average peak sun hours for each state's largest city.
Incentives in california.html
California has no state tax credit, but SGIP rebates of roughly $150–200 per kWh can cut battery costs. Most utilities use net billing (NEM 3.0), which makes batteries more valuable.
The US 30% Residential Clean Energy Credit ended for homeowner systems installed after December 31, 2025. Leased systems and PPAs may still be priced with a federal business credit. See solar incentives in 2026.
Plug-in and balcony solar in california.html
Legal from January 1, 2027. California's SB 868 (signed September 30, 2026) allows up to 1,200 W AC per dwelling.
Estimate a kit with the plug-in solar calculator.
Next steps
- Check your actual rate on your bill. Many utilities in california.html charge more or less than the state average.
- Run your own numbers in the savings calculator.
- Get at least three quotes and compare the price per watt. Use our quote checklist.
Questions about solar in california.html
Is solar worth it in california.html?
Strong case. Rooftop solar pays back quickly here for most sunny, owner-occupied homes. Get at least three quotes.
How much does a solar system cost in california.html?
At about $3.00 per watt before incentives, a 2.8 kW system costs roughly $8,360. Local quotes vary with roof, equipment and installer.
How many panels would a california.html home need?
For a $150 monthly bill, about 2.8 kW, or roughly 2.3 panels per kW using 430 W panels. Use the system size calculator for your exact usage.