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Get a detailed estimate of your system size, cost after subsidy, ROI, payback and CO₂ reduction.
Estimate your savings in seconds
Estimated Annual Savings
₹55,080
*Estimates are indicative. Get a free site survey for an exact quote.
We keep our assumptions transparent and India-tuned. Your real numbers depend on a free site survey — but this gets you close.
We assume a quality, Tier-1 system at roughly ₹60,000 per kW gross — before any government subsidy is applied.
A well-sited rooftop generates about 120 units per kW each month (≈4 units a day), adjusted for your state's sunshine.
Residential systems qualify for the PM Surya Ghar: Muft Bijli Yojana subsidy, capped at ₹78,000 for 3 kW and above.
Every kilowatt installed avoids roughly 1.4 tonnes of CO₂ each year versus grid power — real, measurable climate impact.
A simple rule of thumb: divide your monthly units by 120 to get the kW you need. Match your bill to the table below.
Required system size
Monthly Units ÷ 120
1 kW of solar generates ≈ 120 units a month (about 4 units a day).
Add for future load
× 1.1 to 1.2
Size 10–20% higher to cover new appliances, EV charging and future needs.
| Monthly Units (kWh) | Approx. Solar Size | Roof Area (approx.) |
|---|---|---|
| 120 | 1 kW | 80 – 100 sq.ft |
| 240 | 2 kW | 160 – 200 sq.ft |
| 360 | 3 kW | 240 – 300 sq.ft |
| 480 | 4 kW | 320 – 400 sq.ft |
| 600 | 5 kW | 400 – 500 sq.ft |
| 800 | 6.5 – 7 kW | 520 – 600 sq.ft |
| 1000 | 8 – 9 kW | 640 – 800 sq.ft |
| 1200 | 10 – 11 kW | 800 – 1000 sq.ft |
Indicative figures. Actual generation and roof area depend on your location, shading and roof type.
The most common questions about what solar costs and how much you can claim back.
A quality residential system typically costs ₹55,000–₹75,000 per kW before subsidy. After the PM Surya Ghar subsidy, effective costs drop significantly. Use our calculator for a personalised estimate.
Get a free, no-obligation consultation and a custom savings estimate for your property. Join 10,000+ happy customers powering their future with SolarGeet.