Free Tool

Solar Rooftop Calculator

Estimate your solar system size, cost, and government subsidy in seconds. Powered by PM Surya Ghar Yojana data.

Input Details

Average Monthly Bill (₹)

Electricity Tariff (₹/Unit)

/kWh

Available Rooftop Area (sq. ft.) Note: 1kW requires approx 100 sq. ft.

Customer Category

These are estimated values. Actual results may vary based on site location, panel orientation, and shadow analysis.

📊

Financial Projection

Fill in your details and click calculate to see your potential savings and government subsidy.

Analysis Result

Residential

4.0 kW

Recommended Size

₹2,20,000

Projected Cost

₹78,000

Gov. Subsidy (Approx)

₹1,42,000

Net Investment

Savings Over Time

₹2.8k

Monthly

₹34k

Annual

₹8.5L

25 Years

Payback Period: 4.2 Years

After this period, your electricity is virtually free for the next 20+ years.

Claim This Deal

How the Math Works

Understanding the components of your solar investment.

We calculate the system size based on your monthly consumption (Units). Typically, 1kW of solar capacity generates about 4 units of electricity per day (120 units/month). So, a 3kW system will cover a bill of approx 360 units.

Under PM Surya Ghar Yojana for Residential users:
• 1 kW: ₹30,000
• 2 kW: ₹60,000
• 3 kW or above: ₹78,000 (Maximum cap)