Solar payback compares what a system costs after incentives against how much it actually saves on the electric bill each year.
How it works
Incentives and rebates subtract from the system’s sticker price to find the net cost. Dividing that net cost by the annual electricity bill savings gives the number of years until the system has fully paid for itself.
What this does not include
This uses whatever cost and savings figures are entered rather than a specific national average — system cost, incentive availability, and electricity rates vary too much by location and system size to bake in as a reliable default.
How to use this calculator
- Enter total system cost, any incentives or rebates, and expected annual electricity bill savings.
Frequently asked questions
What’s a typical solar payback period?
It varies significantly by location, system size, local electricity rates, and available incentives — this calculator computes the specific payback for whatever numbers are entered rather than citing one universal average.
Does this account for panel degradation over time?
No — this uses a flat annual savings figure; real solar panels produce slightly less electricity each year as they age, which a more detailed lifetime-savings projection would need to account for.
Should incentives be included in the net cost?
Yes — one-time incentives and rebates directly reduce what’s actually paid out of pocket, which is what should be recovered through bill savings to reach payback.
