Solar Panel Payback Calculator
Calculate how many years until solar panels pay for themselves.
Enter system cost, energy production, and electricity rate.
Solar Payback Period
Solar payback period tells you how long it takes for energy savings to cover the installation cost.
Payback (years) = Net System Cost / Annual Savings
Net Cost = Total Cost − Tax Credits − Rebates
Annual Savings = Annual kWh Production × Electricity Rate
Average US solar system costs (2025):
| System Size | Avg. Cost (before credits) | Avg. Annual Production |
|---|---|---|
| 5 kW | $15,000–$18,000 | 6,000–8,000 kWh |
| 8 kW | $22,000–$28,000 | 9,600–12,800 kWh |
| 10 kW | $27,000–$35,000 | 12,000–16,000 kWh |
US Federal Tax Credit: 30% of system cost (through 2032).
Average electricity rates vary widely:
- US average: ~$0.16/kWh
- California: ~$0.30/kWh
- Texas: ~$0.13/kWh
- Europe average: ~€0.25/kWh
Typical payback period in the US is 6–12 years, with solar panels lasting 25–30 years.