Solar ROI Calculator Intro

Solar Financial ROI Calculator

Solar Design Calculator: Comprehensive financial analysis for solar PV investments including payback period, net present value (NPV), and 25-year cash flow projections. Calculate return on investment with federal tax credits (ITC), state incentives, utility rate escalation, system degradation, and financing options (cash, loan, lease/PPA). Determine levelized cost of energy (LCOE), monthly savings, and break-even analysis for residential and commercial solar installations with discount rate adjustments for time value of money.

System Cost

Total System Cost ($) *

Total installed cost before incentives

Federal Tax Credit (%) *

Current federal solar tax credit (ITC)

State/Local Incentives ($)

Additional state rebates or incentives

Annual Production (kWh) *

From solar production calculator

Payment Method

Cash Purchase

Finance

Custom Split

Adjust Cash/Finance Split

Cash: 70%

Finance: 30%

Cash Percentage (%)

Finance Percentage (%)

Loan Term (years) *

Length of loan (typically 10-25 years)

Interest Rate (%) *

Annual interest rate on loan

Energy Costs

Electricity Rate ($/kWh) *

Current cost per kilowatt-hour

Annual Rate Increase (%) *

Expected yearly electricity cost increase

Additional Costs (Optional)

Annual Maintenance ($)

Yearly maintenance and cleaning costs

System Degradation (%/year)

Annual efficiency loss (typically 0.5%)

Discount Rate (%) *

Annual discount rate for NPV calculation (typically 2-5%)

Analysis Period (years) *

Time period for ROI analysis (typical: 25 years)

Total Lifetime Savings

Payback Period

Net System Cost

Net Present Value

First Year Savings

Financial Breakdown

About This ROI Calculator

This calculator estimates your solar system's financial return on investment over time. It accounts for federal tax credits, state incentives, financing costs, electricity rate increases, and system degradation. Results are estimates and actual savings may vary based on energy consumption patterns, weather conditions, utility rate changes, and system performance. The payback period shows when cumulative savings equal your net investment. Consult with a solar professional and tax advisor for personalized analysis. Federal tax credit availability and rates are subject to change based on current legislation.