PM Surya Ghar: How Big a Rooftop Solar System to Buy

Subsidy is capped at ₹78,000 for 3 kW and above — going bigger earns you nothing extra from the centre.

Size to your annual consumption, not the subsidy: 1 kW makes roughly 4 units a day in most of India.

Net metering rolls over surplus units; net billing or gross metering pays you far less, so confirm which your state uses.

Oversizing past your net-metering limit means giving free power to the grid — many states cap export at your sanctioned load.

Total 3 kW cost is roughly ₹1.8 lakh before subsidy; payback is often 4–6 years, then 20+ years of near-free power.