Same size system, same math, two different states — here's what actually changes between California and Texas, and which one gets you to break-even faster.
Same size system, same math, two different states — here's what actually changes between California and Texas, and which one gets you to break-even faster.
| Metric | California | Texas |
|---|---|---|
| Average residential rate | $0.31/kWh | $0.15/kWh |
| Peak sun hours/day | 5.8 hrs | 5.5 hrs |
| Typical 6kW system cost | $18,600 | $15,600 |
| Estimated annual production | 10,162 kWh | 9,636 kWh |
| Estimated payback | 6 years | 11 years |
| Net metering | Net billing (NEM 3.0) — export credits well below retail rate | No statewide mandate — varies by utility/retail provider |
California comes out ahead on estimated payback — roughly 6 years for a standard 6kW system, against 11 years in Texas, a gap of about 4.9 years. That difference comes from the combination of electricity rate and net metering terms, not system cost alone: a cheaper system in a state with a low electricity rate to offset can still pay back slower than a pricier system in a state where every kWh saved is worth more.
California: California's SGIP program offers battery incentives in some areas; check current funding status before buying storage. Texas: Texas has no state income tax credit, but a property tax exemption on the added home value from solar is available statewide. Neither state's homeowners get the federal residential tax credit for systems installed in 2026 — it expired December 31, 2025 — so these numbers already reflect that reality rather than the older 30%-off assumption still floating around in outdated articles. See our full 2026 tax credit guide for the details.
Payback speed isn't the only thing that matters. If you're comparing these two states because you're deciding where to buy a home or how to plan a move, also weigh how long you expect to stay — a slower-payback state can still make sense if you'll own the home long enough to get well past break-even, since every year after that is pure savings either way. And if either state has a meaningful gap between peak and off-peak electricity rates, a battery can improve the economics further than the panel-only comparison above shows — check that separately with the Battery ROI / Time-of-Use Calculator.
California has the faster estimated payback of the two, at roughly 6 years for a 6kW system versus 11 years in Texas — a gap of about 4.9 years, driven mainly by the difference in electricity rates and net metering terms between the two states.
California's average residential rate is $0.31/kWh, compared to $0.15/kWh in Texas — a difference of $0.16/kWh.