Use the calculator below for a quick, ballpark estimate based on 2026 state-level pricing data. It's a starting point for comparing quotes, not a substitute for an actual site assessment.
How this estimate is calculated
We estimate your system size from your average monthly electric bill and your state's typical electricity rate and sun hours, then apply your state's average installed cost per watt to produce a gross cost estimate. Payback period is calculated from your state's typical electricity rate against the estimated annual production, without assuming any specific tax credit (since the federal credit no longer applies to cash/loan purchases) — check the state page for your state's remaining state-level incentives, which could shorten your real payback further.
Why your real quote will differ from this estimate
- Roof orientation, pitch, shading, and usable square footage all affect real system size and output
- Local permitting and interconnection fees vary by city/utility, not just by state
- Equipment tier (budget vs. premium panels/inverters) shifts price per watt meaningfully
- Your actual usage pattern (time-of-use rates, EV charging, etc.) affects real savings more than a flat average
Treat this as a sanity check on quotes you receive, not a replacement for them — if an installer's number is wildly outside this range, ask them to walk you through why.
Not financial, tax, or legal advice. Figures on this page are 2026 estimates based on industry aggregator data (EnergySage marketplace medians, SEIA/Wood Mackenzie market insight, and regional installer data) and are provided for general informational and comparison purposes only. Actual pricing, incentive eligibility, and payback periods depend on your specific roof, usage, equipment, and local program rules. Confirm current incentive details at dsireusa.org and consult a licensed tax professional and local installers before making a purchase decision.