Solar for villas and large homes
The short answer
Villas and large homes typically land at 5–10 kW: ₹2.3–4.4 lakh installed, with the subsidy capped at ₹78,000 regardless of size. Three-phase connection usually applies, and right-sizing matters even more because every kW above your consumption is full-price with no subsidy.
- recommended size
- 5 kW
- recommended size
- net cost after subsidy
- ₹2,12,000
- net cost after subsidy
- generated per month
- 590 units
- generated per month
- typical payback
- 5 yrs
- typical payback
Why 5 kW: because large homes consuming 600–800 units a month hit the point where each additional kW is genuinely consumed — but the subsidy stops at 3 kW.
What it runs: 2–3 ACs, large fridges, geysers, pumps, home office and full lighting across a multi-storey home.
Roof needed: roughly 450–500 sq ft of shadow-free space.
Worth knowing: Above 3 kW, the subsidy is fixed at ₹78,000 — so the marginal cost per kW rises. Demand three-phase compatibility, generation reporting, and structure design for the extra weight.
Subsidy: ₹78,000 under PM Surya Ghar (₹30,000/kW up to 2 kW, capped at ₹78,000 for 3 kW+, residential connections only) — credited after your DISCOM commissions the system.
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Open the calculatorFAQ
Is my three-phase connection a problem?
No — three-phase connections handle larger systems better. Your installer files net metering at the connection's sanctioned load; DISCOMs routinely clear 5–10 kW on three-phase residential.
Should we add batteries at this size?
Only if outages are long and frequent. At villa scale a hybrid inverter with battery-ready wiring costs little extra upfront; batteries themselves (₹40,000–60,000/kWh) rarely pay back versus net metering.
What are the exact numbers for MY bill and MY state?
These figures use the national-average tariff. Your state's tariff and generation numbers — and your exact bill — are on the calculator and your state's page. The maths is identical; only the local rates change.
City-level numbers
Tariffs vary by state — these pages carry your local DISCOM rates and exact cost tables: