Renewable Energy ROI Calculator

System Cost

Annual Energy Production

kWh

Electricity Rate

Rs/kWh

Annual Maintenance Cost

System Lifetime

Years

Annual Savings: -- Rs

Net Annual Benefit: -- Rs

Payback Period: -- Years

Lifetime ROI: -- %

Formulas

Step 1: Annual Savings

Annual Savings = Annual Energy × Electricity Rate

Step 2: Net Annual Benefit

Net Benefit = Annual Savings – Maintenance Cost

Step 3: Payback Period

Payback = System Cost ÷ Net Annual Benefit

Step 4: Lifetime ROI (%)

ROI = ( (Net Benefit × Lifetime) – System Cost ) ÷ System Cost × 100

Where:
- System Cost = Initial installation cost
- Annual Energy = Energy generated by system in kWh
- Electricity Rate = Price per kWh
- Maintenance = Yearly maintenance cost
- Lifetime = System lifespan (years)

Renewable Energy ROI Calculator

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