Updated Finance

Solar Payback Calculator

Estimate break-even time, net upfront cost after incentives, lifetime savings, ROI, NPV, and a full solar cashflow schedule with export.

Payback Period ROI & NPV Incentives Cashflow Schedule

Solar Break-Even & Lifetime Value Estimator

Model solar economics using either direct annual savings or production-based estimates, then build a detailed schedule and export to CSV.

System Cost (Before Incentives)

Rebate / Upfront Incentive

Tax Credit (%)

Annual Bill Savings (Year 1)

Electricity Rate Increase (%)

System Degradation (%/year)

Annual Maintenance Cost (Year 1)

Maintenance Inflation (%)

Inverter Replacement Year

Inverter Replacement Cost

Analysis Period (Years)

Discount Rate (%)

Install Date

System Cost (Before Incentives)

Rebate / Upfront Incentive

Tax Credit (%)

System Size (kW)

Annual Production per kW (kWh/kW/year)

Self-Consumption (%)

Retail Electricity Rate (per kWh)

Export Credit Rate (per kWh)

Electricity Rate Increase (%)

System Degradation (%/year)

Annual Maintenance Cost (Year 1)

Maintenance Inflation (%)

Inverter Replacement Year

Inverter Replacement Cost

Analysis Period (Years)

Discount Rate (%)

Install Date

Target Payback (Years)

Expected Annual Net Savings (Year 1)

Rebate / Upfront Incentive

Tax Credit (%)

Payback Method

Electricity Rate Increase (%)

System Degradation (%/year)

Annual Maintenance Cost (Year 1)

Maintenance Inflation (%)

Schedule Source

Max Rows

Export

Solar Payback Calculator

Solar Break-Even & Lifetime Value Estimator

Payback Period

Net Upfront Cost

Year 1 Net Savings

Lifetime Benefit

ROI

NPV

Payback Period

Net Upfront Cost

Year 1 Gross Value

Year 1 Net Savings

Lifetime Benefit

NPV

Max Net Upfront Cost

Max System Cost (Before Incentives)

Assumed Year 1 Net

Method Notes

Solar Payback Calculator

Solar Break-Even & Lifetime Value Estimator

Payback Period

Net Upfront Cost

Year 1 Net Savings

Lifetime Benefit

ROI

NPV

Payback Period

Net Upfront Cost

Year 1 Gross Value

Year 1 Net Savings

Lifetime Benefit

NPV

Max Net Upfront Cost

Max System Cost (Before Incentives)

Assumed Year 1 Net

Method Notes

Related Calculators