📈 Solar Payback Calculator
Enter the net system cost, its annual production and your electricity rate to estimate the simple payback period and long-term savings.
Simple payback
6.7 yrs
Annual savings
1,800
Net savings over 25 yrs
33,000
Simple payback = net cost ÷ annual savings, where annual savings = production × your rate. It's a first-order estimate: it ignores electricity-price inflation (which shortens payback), panel degradation (~0.5%/yr) and the time-value of money, and assumes you use or are credited for all the energy. Use it to compare options, not as financial advice — get quotes and check local incentives and net-metering rules. Amounts are in whatever currency you enter. 🔒 In your browser.
How the solar payback calculator works
Solar pays back by offsetting electricity you would otherwise buy. The tool multiplies the system's annual production by your electricity rate for the yearly savings, then divides the net cost (after any incentives) by that to get the simple payback period in years — and projects the net savings over a 25-year panel lifetime.
This is a simplified, first-order estimate for comparison, not financial advice. It ignores electricity-price inflation (which shortens payback), gradual panel degradation (~0.5%/year), maintenance, and the time-value of money, and it assumes you use or are credited for all the energy produced. Real returns depend on local incentives, net-metering rules and your usage — get quotes and check the details.
Frequently asked questions
How long does it take for solar panels to pay for themselves?
Typically somewhere around 6–12 years, depending on system cost, sunlight, your electricity rate and incentives. Payback = net cost ÷ annual savings; a $12,000 system saving $1,800/year pays back in about 6.7 years.
How do I calculate solar payback?
Divide the net system cost (after rebates and tax credits) by the annual savings, where annual savings = yearly production (kWh) × your electricity rate. The result is the simple payback in years.
Is solar worth it financially?
Usually, if payback is well within the ~25-year panel lifetime — after payback the electricity is essentially free. It depends heavily on your rate (higher rates pay back faster), local sun, incentives and net-metering. This tool gives a first estimate to compare against quotes.
Why is this only an estimate?
Simple payback ignores electricity-price rises (which help), panel degradation and maintenance (which hurt slightly), and financing costs. It also assumes you benefit from all the energy. It's a solid comparison tool, not a substitute for a detailed quote.
What is net metering and does it matter?
Net metering credits you for surplus energy you send back to the grid, effectively storing value for later use. Where it's generous, more of your production counts toward savings and payback is faster; where it isn't, only self-consumed energy saves you money.