3kW Solar System
The 3 kW system is the most popular residential size in India, and for good reason. It earns the maximum central subsidy of 78,000 rupees under PM Surya Ghar and can deliver close to 300 units a month, which is enough to zero out the bill for many average households.
At a glance
- Ideal for: average homes, bills around 2,500 to 3,500 rupees a month.
- Roof space needed: roughly 250 to 300 square feet, shadow free.
- Monthly generation: about 300 to 400 units in North India.
- Panels: 5 to 6 Mono PERC modules, on-grid with net metering.
Cost and subsidy
Indicative pre-subsidy cost is around 1.5 to 1.8 lakh rupees. With the full 78,000 rupee PM Surya Ghar subsidy, the central benefit covers roughly 43 to 52 percent of the cost, and the net price falls sharply. Collateral-free solar loans are available through public-sector banks for the balance.
Expected savings
A 3 kW system can save 2,500 to 3,500 rupees a month and often eliminates the bill entirely under net metering, with payback commonly in four to six years across North India.
FAQs
It hits the sweet spot: it earns the maximum 78,000 rupee central subsidy, fits a standard home roof, and generates close to the 300 free units the scheme targets.
No. The central subsidy is capped at 78,000 rupees for 3 kW and above. Size your system to your actual consumption, not to chase subsidy.