Solar Energy Payback Period Calculator

Calculate the financial return of your solar investment using NREL methodologies

System Cost ($)(Total installation cost)

Annual Energy Production (kWh)

Electricity Rate ($/kWh)

Incentives/Rebates ($)(Tax credits, rebates, etc.)

Annual Maintenance Cost ($)

Electricity Price Inflation (%)(Annual increase)

System Degradation Rate (%)(Annual performance loss)

Financing Option

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Quick Tips

1Use current environmental data
2Consider seasonal variations
3Document calculation assumptions
4Update calculations periodically