ROI / Payback Calculator

Calculate solar investment payback, NPV, and 25-year savings

System Size (kW)

Total Cost ($)

Federal Tax Credit (%)

State/Local Incentives ($)

Utility Rate ($/kWh)

Annual Production (kWh)Leave 0 to auto-calculate: kW × 1.3 × 365

Degradation Rate (%/year)

Discount Rate (%)

Enter your parameters and click Calculate to see results