Solar Project ROI Calculator

Calculate payback period, IRR, NPV, and 25-year returns for any solar project. Just enter your system size and location.

Project Inputs

System Size (kWp)

CAPEX per kWp ($)

Typical: $600-900/kWp commercial, $800-1200 residential

Region (solar yield)

Electricity Price ($/kWh)

Your avoided electricity rate or PPA price

Advanced Settings

Annual OPEX (% of CAPEX)

Annual Degradation (%)

Discount Rate for NPV (%)

Key Metrics

3.7y

Payback Period

27.0%

IRR

$166k

25yr NPV

$386k

25yr Profit

Financial Summary

CAPEX (initial investment)$70,000

Year 1 Generation135,000 kWh

Year 1 Revenue$20,250

Annual OPEX$1,050

25-Year Total Generation3218 MWh

Avg Annual ROI22.1%

Ready to Make It Happen?

Get a detailed quote based on your ROI analysis. Frank can help refine cost estimates for your specific location.

Get Module Quote Based on This Analysis

Email me these results

Save your inputs + results for reference. Frank will follow up within 30 min if you want a firm quote.

We email your results once. No spam — your data goes only to Frank.

Disclaimer: This calculator provides estimates for illustrative purposes only. Actual project economics depend on many factors including permits, grid connection costs, site-specific shading, exact local electricity rates, tariffs, and financing terms. Contact Frank for a detailed project feasibility analysis.