Part of the complete guide: Business, institutions & farms
Quick answer
Institutions such as churches, mission schools and hospitals can install 20–100 kW rooftop systems and save ₹2–10 lakh a year. They do not receive PM Surya Ghar subsidy, but can choose CAPEX (own the system) or RESCO/OPEX (pay per unit, zero upfront). Payback is typically 3–5 years because institutional tariffs are higher.
Why one project equals 20–50 homes
A 50 kW system generates ~72,000 units a year. For schools and hospitals paying commercial-type tariffs, savings can reach ₹6–9 lakh a year — equal to dozens of homes.
Business models
| Model | Upfront | Best for |
|---|---|---|
| CAPEX | ₹45,000–₹55,000/kW | Institutions with funds or loans |
| RESCO / OPEX | Zero | Trusts preferring no capital outlay |
| Donor-funded | Partial/full donation | Mission institutions with benefactors |
Technical points
- Large sloped / sheet roofs — structural audit and wind-rated mounting
- Three-phase LT or HT connection with net metering
- Peak load during school hours aligns with solar generation
- Hospitals: add backup and strict reliability
Where we help
Energy audit, ROI model, vendor selection, trust-board presentation, financing and supervision. See institutional solar.
Always verify. Subsidy, tariff and price figures change. Confirm with the official portal, KSEB/TNPDCL and a written quote before paying any advance. Figures here are indicative for South Kerala & Kanyakumari.
