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Solar panel cost and payback in California
Measured production, your actual utility's filed rates, and honest payback maths with no federal tax credit applied - because for a home bought today there is not one.
The Residential Clean Energy Credit was terminated for home purchases after 2025-12-31, so the $32,226 above is what a California household actually pays - not a headline price with a rebate quietly subtracted. A quote that still shows the credit is overstating your return by about that amount, which on these numbers is roughly 5 years of savings.
Rates run from $0.1303 to $0.1635 per kWh depending on who serves you. Since your bill is the single biggest driver of solar payback, a statewide average would be badly wrong for many readers. Find your own answer with the calculator, which uses your specific utility.
What solar costs in California at different bills
Worked at 1638.5 kWh per kW per year and $0.1559 per kWh, the midpoints across the 4 metros below, at $3.43 per watt installed.
| Monthly bill | System | Cost | Year-1 saving | Payback | 25-year net |
|---|---|---|---|---|---|
| $120 | 5.6 kW | $19,336 | $1,271 | 13.2 yrs | +$23,043 |
| $200 | 9.4 kW | $32,226 | $2,118 | 13.2 yrs | +$38,405 |
| $300 | 10.0 kWroof limit; covers 71% | $34,300 | $2,254 | 13.2 yrs | +$40,876 |
Exported surplus is valued at zero throughout, so these are floors rather than best cases. Where fully covering the bill would need more panels than a roof holds, the row shows the largest system that actually fits and the share of your usage it covers - not the lifetime return on an array nobody can build. Your own bill and roof will move them - run your address.
Sunlight and rates by California metro
Straight from NREL PVWatts and the utility rate database, by named utility. This is why one statewide figure does not work.
| Metro | Utility | Production | Rate |
|---|---|---|---|
| Los Angeles | Los Angeles Dept of Water & Power | 1,669 kWh/kW | $0.1303 |
| San Jose | Pacific Gas & Electric Co | 1,637 kWh/kW | $0.1559 |
| San Diego | San Diego Gas & Electric Co | 1,596 kWh/kW | $0.1635 |
| Fresno | Pacific Gas & Electric Co | 1,640 kWh/kW | $0.1559 |
What California pays you for surplus power
Net billing, not net metering
New systems take the Net Billing Tariff. Exported power is paid at the utility's avoided cost, usually well below the retail rate you pay, though it can exceed retail on late summer evenings. Your export rate is locked for the first five years.
The CPUC adopted the Net Billing Tariff in decision D.22-12-056 on 15 December 2022, and it has applied to interconnection applications since 15 April 2023. It cut export value sharply against the old NEM 2.0 rules, which is why advice written before 2023 is misleading in California. The practical consequence is that using your own power as you generate it now matters far more than exporting it, and batteries change the maths more here than in most states.
Checked 2026-08-21 against CPUC, Net Billing Tariff. Export rules are being rewritten across the country, so verify before you sign. Current incentive detail for California is maintained at DSIRE, which we link to rather than copy precisely because it changes.
Is solar worth it in California?
Reasonably, yes - but it is an investment rather than a quick win. Payback around 13.2 years on a $200 bill, with about $38,405 over 25 years. That is long enough that it matters whether you expect to stay in the house, and long enough that the price you negotiate genuinely changes the answer.
Rates across California differ by 25%, so which utility serves you changes this answer more than anything else on the page. Run your ZIP code through the calculator for numbers worked from your own utility rather than a California midpoint. It asks for no email address and nobody will call you.
California solar questions
Did NEM 3.0 kill solar in California?
No, but it changed what a good system looks like. Export credits fell sharply when the Net Billing Tariff replaced NEM 2.0 in April 2023, so a system sized to export a large surplus no longer pays the way it used to. What still works is sizing to the power you use while you are generating it. California retains high retail rates and strong sun, which is why the payback here remains better than most of the country.
Do I need a battery in California now?
It matters more here than almost anywhere, because the gap between what you pay for power and what you are credited for exports is now wide. Storing your afternoon surplus to use in the evening captures the retail rate instead of the much lower export rate. Whether it pays depends on the battery quote, which is why our estimate excludes storage entirely rather than assuming it helps.
Why is my rate so different from a friend's elsewhere in California?
Because California is not one electricity market. Los Angeles is served by LADWP, a municipal utility with rates well below the big investor-owned utilities, while much of the state is on PG&E, SCE or SDG&E at substantially higher prices. Since your rate is the biggest driver of payback, a statewide California average is close to meaningless. Use your own ZIP code.