Give each installer the same electricity bills, operating hours, roof details and scope. Compare the complete installation, ongoing support and the assumptions behind any savings estimate.
Your installer’s proposal
- The proposal should give the system size, equipment list and generation estimate.
- The plan should cover approvals, electrical work, installation timing and maintenance access.
- The quote should be itemised, with taxes, exclusions, warranties and payment terms.
The PM Surya Ghar subsidy is for homes only.
Daytime use covered by solar
| Example | Use each month | Solar size | Use met by solar |
|---|---|---|---|
| 9 am to 6 pm | 5,000 units | 42 kW | 73% |
| 9 am to 6 pm | 15,000 units | 125 kW | 73% |
| 8 am to 8 pm | 5,000 units | 42 kW | 65% |
| 8 am to 8 pm | 15,000 units | 125 kW | 65% |
The calculation assumes six working days and 80% of use in working hours.