Calculator

Solar Panel Calculator

Calculate solar panel ROI, payback period, 25-year savings, and CO₂ offset. Includes 30% federal tax credit.

☀️System Details

System size (kW)

Installation cost ($)

Electricity rate ($/kWh)

Average daily sun hours

Annual panel degradation (%)

Electricity price inflation (%/yr)

Enable Net Metering (sell excess to grid)

🏛️ 30% federal Investment Tax Credit (IRA) applied automatically. System efficiency: 75%. CO₂ factor: 0.386 kg/kWh (US average).