Rooftop Solar for Housing Societies — Complete Guide 2026
Housing societies and apartment complexes are increasingly adopting solar — both for common area electricity and individual flat owner benefits through group net metering.
Two Solar Approaches for Societies
Option 1: Common Area Solar
- Solar installed on rooftop, powers common areas (lifts, lights, pumps)
- Directly reduces society's common area electricity bill
- Managed by society committee
- Simplest to implement — no individual agreements needed
- Savings shared proportionally through lower maintenance charges
Option 2: Group Net Metering (Virtual Net Metering)
- Common rooftop solar shared among individual flat owners
- Each flat owner gets allocated solar units deducted from their personal bill
- Available in Maharashtra, Gujarat, Karnataka, Tamil Nadu and most major states
- More complex to set up but individual residents benefit directly
Financial Benefits for Societies
| Society Size | Typical System | Common Area Monthly Saving | Payback Period |
|---|---|---|---|
| 20 flats | 20–30 kW | ₹18,000–30,000 | 4–5 years |
| 50 flats | 50–75 kW | ₹45,000–75,000 | 4–5 years |
| 100 flats | 100–150 kW | ₹90,000–1,50,000 | 3–4 years |
How to Start the Process
- Pass a resolution in AGM or special general body meeting
- Get roof survey done by 2–3 solar companies
- Get at least 3 quotes comparing system size, brand, warranty
- Apply for net metering with DISCOM (installer handles this)
- Decide allocation method if doing group net metering
RERA and Legal Considerations
- Society committee has authority to install solar on common roof
- No individual flat owner permission needed for common area solar
- For individual allocation: document sharing agreement in society records
State-Specific Group Net Metering Rules
- Maharashtra: MSEDCL allows group net metering for housing societies
- Gujarat: SURYA Gujarat scheme has specific provisions for multi-unit buildings
- Karnataka: BESCOM has a clear group net metering framework
- Tamil Nadu: TANGEDCO allows virtual net metering for societies
Find Commercial Solar Installers for Societies
Use GoSolarIndex commercial installers to find companies experienced with housing society installations in your city.