Solar for apartments: ₹18,000 per kW subsidy
Put the shared terrace to work. A common-area solar system runs your lifts, pumps and lights, lowers the common EB bill and the monthly maintenance charge, with a PM Surya Ghar subsidy paid to the association.
Free survey for your apartment
For RWA members, secretaries and builders.
Estimate your RWA subsidy
Estimate as of October 2026. Final amount is set on the PM Surya Ghar portal after inspection.
What it powers
The system connects to the common meter, so every resident shares the saving.
The rules in one look
- Who applies
- RWA or Group Housing Society
- Subsidy
- ₹18,000 per kW
- Counted at
- 3 kW per house
- Maximum
- 500 kW
- Where
- Tamil Nadu and Puducherry
- Example
- 24 flats, 20 kW plant: ₹3,60,000
How it works for an apartment
We make it easy for the RWA committee.
- 1
Free terrace survey
Space, shade and the common EB bill.
- 2
RWA meeting summary
One page with size, cost, subsidy and savings.
- 3
Resolution and application
RWA approves; we apply on the portal.
- 4
Installation
Usually a few days on the terrace.
Net meter and subsidy
Inspection, net meter, then subsidy to the RWA.
Apartment solar FAQs
Do apartments get the PM Surya Ghar subsidy?
Yes. A Resident Welfare Association (RWA) or Group Housing Society gets ₹18,000 per kW for a rooftop system that runs common facilities, up to 500 kW, counted at 3 kW per house. This applies in Tamil Nadu and Puducherry.
How is the apartment subsidy calculated?
Subsidy = ₹18,000 x the lower of (number of flats x 3 kW) and the plant size, with a 500 kW ceiling. A 20 kW plant in a 24-flat building gets 20 x ₹18,000 = ₹3,60,000.
Can a single flat owner install solar?
Usually not on a shared terrace. Individual flats can install only if they have an exclusive roof area and their own connection. The common-area system through the RWA is the normal route.
How much power does a common-area system make?
Roughly 4-5 units per kW per day in Tamil Nadu. A 20 kW system makes about 80-100 units a day, which can cut the common EB bill and the monthly maintenance charge.
What does the RWA need to decide?
A resolution approving the system, the roof area to use, and who will sign the application. We give you a simple summary for the RWA meeting and handle the portal application.
See commercial rooftop solar for businesses.