For a decade, the math on residential solar started with a simple step: take the gross price, subtract 30%. That step is gone. If you are getting solar quotes in 2026, every payback figure you see should be judged on the system's own numbers — no assumed credit, no hoped-for rebate. Here is how to think about it honestly.
What actually changed
The federal Residential Clean Energy Credit — 30% of the installed cost claimed on your tax return — expired for spending after December 31, 2025. On a $25,000 system, that was a $7,500 swing. There is no federal replacement for residential installs in 2026. Anyone showing you a quote that still nets out a 30% credit is working from last year's playbook; ask them to re-run it gross.
What still helps (and it varies by address)
The federal credit was national, which made it simple. What remains is local — and that means your address matters more than ever:
- State and utility incentives: a number of states still run their own rebates, performance payments, or tax exemptions. These change frequently and differ enormously — check the DSIRE database for your state rather than trusting a salesperson's summary.
- Net metering terms: in states with full retail-rate net metering, every exported kWh offsets a purchased kWh, which shortens payback even with no incentive at all. Where export credits are weak, self-consumption (and often a battery) does the heavy lifting.
- Your electricity rate: this was always the biggest variable and now it dominates. At $0.30/kWh, a system pays back roughly twice as fast as at $0.15/kWh — same panels, same sun.
The gross-numbers test
Run any quote through this filter: installed cost per watt (commonly $2.70–$3.20), your annual electricity bill, and your roof's realistic production. Divide gross cost by annual savings for a rough payback. Our solar calculator does exactly this with local electricity rates and sun hours — and deliberately assumes $0 incentive unless one is currently verified, so the number you see is the conservative one.
As a rule of thumb from the gross-cost snapshot in our honest guide: an 8 kW system at ~$2,800–$3,200/kW with average rates shows a 13–16 year gross payback. Above $0.20/kWh or with strong net metering, that compresses fast. Below $0.12/kWh with weak export terms, think carefully.
Batteries: more relevant now, not less
Without the credit softening the total, the value of each self-consumed kWh rises relative to each exported kWh — especially under net-billing tariffs like California's NEM 3.0. A battery shifts evening usage onto your own solar instead of the grid, and in outage-prone areas it adds resilience that no payback spreadsheet captures. Price the battery on its own merits; do not let it hide in a blended "system payback" number.
The bottom line
Solar in 2026 is a worse deal than solar in 2025 — that is just arithmetic. But "worse than last year" is not the same as "bad." In high-rate states with decent sun and fair net metering, gross payback still clears comfortably within a system's 25-year life. The discipline that matters now: demand gross numbers, verify any claimed incentive yourself, and compare at least three local quotes. The credit is gone; the sun is not.