In 2026, the gross turnkey cost of an on-grid residential rooftop solar system in India ranges from ₹55,000 to ₹72,000 per kW before government subsidies. For an average 3 kW residential home, the gross turnkey cost is approximately ₹1,65,000 to ₹2,10,000. After deducting the maximum central PM Surya Ghar subsidy of ₹78,000, the effective net investment paid by the homeowner is ₹87,000 to ₹1,32,000.

A 1 kW grid-tied solar system typically costs ₹60,000 to ₹75,000 before subsidy. Under PM Surya Ghar: Muft Bijli Yojana, a 1 kW residential system qualifies for a direct central subsidy of ₹30,000, bringing the net consumer cost down to ₹30,000 to ₹45,000. It requires ~80–100 sq.ft of shadow-free roof area and generates 120–140 electricity units per month.

A standard 3 kW residential solar system costs approximately ₹1,65,000 to ₹2,10,000 gross. Because 3 kW is the threshold that captures the full central subsidy cap of ₹78,000 (₹30,000/kW for the first 2 kW + ₹18,000 for the 3rd kW), the net homeowner investment is ₹87,000 to ₹1,32,000. In Uttar Pradesh, an additional state subsidy of ₹30,000 brings the net cost down to under ₹80,000!

A 5 kW grid-tied solar system costs ₹2,55,000 to ₹3,20,000 before subsidy. The central PM Surya Ghar subsidy remains capped at ₹78,000 for all capacities 3 kW and higher, resulting in a net cost of ₹1,77,000 to ₹2,42,000. A 5 kW system generates approximately 600–700 units monthly and requires 400–500 sq.ft of roof space.

A 10 kW rooftop solar installation costs between ₹4,80,000 and ₹5,90,000 gross. If installed for an individual residential home, it receives the standard capped subsidy of ₹78,000 (net cost: ₹4,02,000 to ₹5,12,000). If installed by a commercial entity, factory, or hospital, it receives no direct residential cash subsidy but qualifies for 40% Accelerated Depreciation tax savings and GST input tax credit.

Under PM Surya Ghar, the central subsidy is structured in fixed slabs: ₹30,000 for 1 kW, ₹60,000 for 2 kW, and ₹78,000 for 3 kW and above for individual residential connections. Group Housing Societies and Resident Welfare Associations (RWAs) qualify for ₹18,000 per kW up to a maximum capacity of 500 kW for common utility loads.

No. While the scheme is titled ‘Muft Bijli Yojana’, the installation itself is not free. The homeowner must pay the net capital cost after subsidy (typically ₹38,000 for 1 kW, ₹68,000 for 2 kW, or ₹1,07,000 for 3 kW). The term ‘free electricity’ refers to the fact that once installed, the system generates up to 300 units of electricity per month with zero ongoing fuel cost, eliminating that corresponding consumption from your DISCOM bill.

Central residential subsidies are restricted to domestic individual households with an active residential electricity consumer account and suitable independent rooftop space. Commercial businesses, industrial complexes, agricultural connections, and government offices are ineligible for direct PM Surya Ghar capital subsidies.

A 3 kW solar installation using modern 550Wp modules consists of 6 panels, occupying a physical panel area of ~167 sq.ft. However, on a flat RCC terrace, the practical usable roof area required is 240 to 300 sq.ft to accommodate inter-row pitch spacing, parapet wall shadow clearance, and walking paths for cleaning.

In India, 1 kW of solar PV generates an average of 4.0 to 5.2 kWh (units) per day, depending on regional solar irradiation, tilt angle, and module cleanliness. Annually, 1 kW generates between 1,400 and 1,650 units of electricity.

No. In an On-Grid solar system, no batteries are required. Excess solar energy generated during the daytime is exported directly into the utility grid through a bi-directional net meter. Batteries are only necessary if you opt for an Off-Grid or Hybrid system to provide backup during frequent grid blackouts.

No. Standard grid-tied solar inverters automatically shut down within 2 seconds of a grid failure. This is a mandatory safety mechanism known as Anti-Islanding Protection (IEEE 1547 / CEA regulations), designed to prevent lethal solar current from flowing into grid wires while linesmen are working. To run solar during blackouts, you need a Hybrid Inverter with an automatic transfer switch or a separate battery backup.

For residential on-grid systems utilizing the PM Surya Ghar subsidy, the simple financial payback period ranges from 2.8 to 3.8 years. For commercial consumers paying high tariffs of ₹10–₹12/unit and claiming Accelerated Depreciation, payback is often reached in 2.0 to 2.8 years.

Professional EPC turnkey quotations generally include the liaisoning, paperwork, single-line diagrams, and DISCOM inspection coordination. However, some utilities charge a direct statutory fee for bi-directional meter testing, application processing, or meter security (typically ₹2,000 to ₹6,000), which may be billed directly on your monthly electricity bill.

Verify that the installer is officially empanelled on the National Portal (pmsuryaghar.gov.in). Ensure they provide written confirmation of DCR-compliant ALMM modules, Hot-Dip Galvanized structures with at least 80 microns zinc coating, 3 dedicated chemical earthing pits, and a minimum 5-year workmanship warranty.

Uttar Pradesh provides the most generous state top-up: ₹15,000/kW up to a maximum of ₹30,000 on residential installations. Delhi provides a Generation Based Incentive (GBI) of ₹3/kWh for 5 years on systems up to 3 kW. Himachal Pradesh provides approximately ₹4,000/kW state assistance. Other states provide expedited single-window net-metering approvals without direct cash top-ups.

In Maharashtra (MSEDCL, Tata Power, Adani Electricity), a 3 kW system costs approximately ₹1,70,000 to ₹2,05,000 gross. After deducting the ₹78,000 PM Surya Ghar subsidy, the net consumer outlay is ₹92,000 to ₹1,27,000. High residential tariff slabs in Mumbai and Pune make payback exceptionally rapid (~3.0 to 3.4 years).

Yes. Group Housing Societies (GHS) and Resident Welfare Associations (RWAs) can install rooftop solar on common building terraces under PM Surya Ghar, receiving a central subsidy of ₹18,000 per kW up to 500 kW. The generated power is used to offset common community electricity bills (elevators, water pumping, corridor lighting, and EV charging points).

Rooftop solar requires minimal maintenance: wash the glass modules every 10 to 14 days using low-TDS water during early mornings or evenings. Annually, an electrical technician should inspect cable terminations, verify inverter error logs, check SPD surge status, and measure earthing resistance to ensure it remains below 5 Ohms.

Divide your average monthly electricity consumption (units recorded on your bill) by 130 (the average monthly generation of 1 kW in India). For example, if your family consumes 390 units per month: 390 ÷ 130 = 3.0 kW. Alternatively, you can use our interactive calculator in Section 11 above to estimate your recommended capacity automatically.