Energy ROI Calculator

Calculate your renewable energy return on investment. Whether you're in Australia with generous STCs, Singapore with net metering, or Thailand — get production estimates, annual savings, payback year, and CO₂ impact.

Your System Details

Location

System Size (kW)

Total System Cost ($)

Incentives Applied ($)

Annual Production

11.2 MWh

Year 1

Year 1 Savings

US$3,140

Payback: 7 years

25-Year Net Savings

US$53,956

After full system cost

CO₂ Offset

118.9 tonnes

≈ planting 5,660 trees

25-Year Cumulative Net Savings

Assumes 0.5%/year degradation and flat electricity rate of $0.28/kWh. Actual results vary.

How this calculator works

• Annual production = system kW × peak sun hours (by region) × 365 days × 0.80 performance ratio
• Annual savings = annual production × your electricity rate
• Payback year = net cost (after incentives) ÷ annual savings
• 25-year projection uses 0.5%/year panel degradation (industry standard)

Results are estimates. Actual performance varies with weather, equipment, and site conditions. See our methodology for full calculation details.

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