Calculator – Sunswiftsolar

Green fields are editable · White fields are auto-calculated

Solar Savings & ROI Calculator

Fill your last 12 months units and project details to see solar capacity, yearly savings, tax benefit and ROI in years.

Energy generation from solar per kW per day (kWh)

Usual value: 4 kWh/kW/day

Input margin for future expansion

Enter 0.20 (20%) – same logic as your sheet

Capacity needed (kW)

Total proposed capacity (kW)

Capacity = Daily Average ÷ Energy per kW per day Proposed Capacity = Capacity × (1 + Margin)

Energy generation from solar system (kWh per kW per day)

Editable – usually same as 4 kWh/kW/day

Daily energy generation from solar (kWh)

Monthly energy generation from solar (kWh)

Yearly energy generation from solar (kWh)

Daily generation = Total Proposed Capacity × Energy generation from solar system. Monthly = Daily × 30 · Yearly = Daily × 365.

Total project cost (₹)

Cost per kWh (grid tariff) – ₹

Income tax exemption on project cost

Enter 0.30 (30%) or 30

Yearly electricity cost saving (₹)

Saving from income tax exemption (₹)

Net investment after tax exemption (₹)

Net income after exemption (₹)

ROI / Payback period (Years)