Solar Panel Cost Calculator India

Estimate your rooftop solar installation cost, government subsidy, electricity savings, and payback period based on your monthly bill and state.

Enter your average electricity bill in ₹.
Average rate in ₹ per kWh or unit.
Percentage of roof that is clear of shade and obstacles.

Recent Solar Cost Calculations

Explore recent rooftop solar cost estimates based on different electricity bills, states, and customer types across India.

How to Calculate Solar Panel Cost and Savings

Enter your electricity usage and rooftop details to estimate your recommended solar system size, installation cost, subsidy, and savings.

1
Select Your Customer Type and State

Choose whether the installation is for a residential or commercial property and select your state to calculate location-based solar generation and subsidy estimates.

2
Enter Your Monthly Electricity Bill

Add your average monthly electricity bill and tariff rate. The calculator uses this information to estimate your electricity consumption and recommended solar capacity.

3
Add Rooftop Area and Shade Details

Enter your available rooftop area and the percentage of shadow-free space. These values help estimate how much solar capacity can fit on your roof.

4
View Your Solar Cost and Savings Estimate

Get an estimated solar system size, installation cost, subsidy amount, electricity savings, and expected payback period based on your inputs.

Calculation Assumptions

How These Estimates Are Calculated
  • Approximate output benchmark: 1 kW rooftop solar generates about 120 units per month in typical Indian conditions.
  • Only 75% of shadow-free roof is considered usable to account for spacing, setbacks and maintenance access.
  • Indicative residential subsidy is applied using common PM Surya Ghar slabs up to 3 kW, with a practical cap beyond that.
  • Project cost per kW is kept editable in PHP for easy customization to your installer or state market rates.
  • Annual generation includes a derating factor for real-world system losses.