California Solar Guide 2026
Everything California homeowners need to know: costs, incentives, net metering policy, and what makes this state unique for solar.
Quick answer
California solar economics depend mainly on 5.7 average peak sun hours, an estimated $3.1/W installed cost, 28.0¢/kWh electricity, and the state's current net-metering rules.
Reviewed 2026-07-26
- Best for
- California homeowners comparing solar costs, incentives, and payback assumptions.
- Inputs needed
- annual kWh usage, utility rate, installed $/W, net-metering policy
- Formula used
- Typical production = system kW × peak sun hours × 365.
- Source checked
- state incentive data, utility tariff checks, Wattcrunch price benchmarks
Key fact about California solar
California has more installed solar than the next 5 states combined, but NEM 3.0 changed the economics significantly — batteries are now essential for maximum savings.
Peak sun hours
5.7
hrs/day avg
Avg electricity rate
28.0¢
per kWh
Median install cost
$3.1/W
before incentives
Typical payback
8 yrs
8 kW system, avg usage
Typical 8 kW system in California
Annual production
16,644 kWh
Year-1 savings
$4,660
System cost (est.)
$24,800
No federal tax credit — Section 25D expired December 31, 2025.
California Net Metering Policy
Net Billing (NEM 3.0)
NEM 3.0 (2023) credits exports at avoided-cost rates (~$0.05–$0.08/kWh), significantly lower than prior full-retail NEM 2.0. Batteries are now far more valuable for CA solar owners.
California Solar Incentives
Available in addition to any utility rebates. Federal 25D credit is $0 for homeowner-owned systems from 2026.
- ✓SGIP battery rebate ($0.15–$0.25/Wh)
- ✓Single-family Affordable Solar Homes (SASH)
- ✓PG&E/SCE/SDG&E low-income programs
Top Utilities in California
Interconnection timeline: 4–10 weeks (SGIP approval can add time)
State-specific decision guide
What to verify before signing a California solar quote
In California, the financial result depends on more than sunshine or the headline installation price. Confirm the export rule, program eligibility date, and interconnection timeline for your exact utility before treating a payback estimate as a promise.
Export value
This page models net billing (nem 3.0). Ask which tariff and export credit apply to your account, not only which program name appears in the proposal.
Incentive eligibility
Check equipment, income, installer, application, and placed-in-service rules before subtracting an incentive from the quote. Programs can close or change terms.
Interconnection
Budget for the published 4–10 weeks (sgip approval can add time) and confirm who pays for a required meter, service upgrade, or engineering review.
Source trail: production assumptions use NREL PVWatts; incentive discovery should be checked against DSIRE; electricity-market context is available from the EIA. Confirm final tax treatment with the IRS and your utility.
Calculate your California solar economics
Our calculators are pre-filled with California data. Run any tool below.