Home Rooftop Solar Size, Subsidy & Payback Calculator
Size your rooftop solar power plant, calculate your direct government DBT subsidy up to ₹78,000, and simulate your 25-year net savings.
Home Rooftop Solar Specifications & Roof Dimensions
Check your average summer bill.
~90–100 sq ft required per 1 kW.
Higher slab rate in your state.
Desired solar coverage level.
Rooftop Solar Financial Payback Timeline
Includes solar panels, on-grid inverter, mounting structure, bi-directional net meter, and installation.
You only pay this net amount after receiving ₹60,000 directly into your bank account.
Solar panels carry a 25-year performance warranty. After recovering costs in 3.4 years, you generate free electricity for 21+ years.
Frequently Asked Questions
Q:How much roof area is required for a 3 kW solar system in India?
A 3 kW rooftop solar system requires approximately 270 to 300 square feet of unobstructed, shadow-free roof area. Using high-efficiency Mono PERC solar panels (540W to 550W each), a 3 kW setup requires approximately 5 to 6 panels.
Q:What is the PM Surya Ghar Muft Bijli Yojana subsidy slab?
The Central Government provides direct benefit transfer (DBT) subsidies: ₹30,000 for 1 kW, ₹60,000 for 2 kW, and a maximum subsidy of ₹78,000 for systems of 3 kW or greater. Additional state subsidies may apply in specific states like Uttar Pradesh and Gujarat.
Q:How does on-grid solar net-metering work?
With an on-grid system, the electricity generated during sunny daytime hours powers your home first. Any surplus power is exported back to the state electricity grid through a bi-directional net meter. At night, you draw power from the grid. At the end of the month, your DISCOM bill only charges for net imported units.
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