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Solar Payback Calculator
Estimate simple solar payback from system cost, incentives, generation, and rates.
Formula
net_cost = system_cost - incentives annual_savings = self_consumed_kwh * electricity_rate + exported_kwh * export_rate - annual_om_cost simple_payback_years = net_cost / annual_savings
Assumptions
- Inputs are user-provided.
- Results are preliminary estimates.
- Electricity and export rates stay constant.
Limitations
- This is not investment advice and does not model financing, inflation, degradation, or taxes.
Methodology
Simple payback divides net cost by annual savings.
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.