Rooftop Solar in Chennai — 2026 Complete Guide
Chennai and Tamil Nadu have one of India's most progressive solar net metering policies. TANGEDCO actively supports rooftop solar and Tamil Nadu's high solar irradiance makes installations highly profitable.
Solar Installation Cost in Chennai
| System Size | Daily Units | Total Cost | After All Subsidies |
|---|---|---|---|
| 2 kW | 8–10 | ₹1.0–1.2 lakh | ₹20,000–40,000 |
| 3 kW | 12–15 | ₹1.4–1.8 lakh | ₹52,000–82,000 |
| 5 kW | 20–25 | ₹2.3–3.0 lakh | ₹1.52–2.22 lakh |
| 10 kW | 40–50 | ₹4.6–5.8 lakh | ₹3.82–5.02 lakh |
TANGEDCO Net Metering Process
- Install solar with TANGEDCO-empanelled installer
- Submit application at tangedco.gov.in
- TANGEDCO site inspection
- Bidirectional meter installation
- Feed-in tariff: ₹2.25/unit (excess credited to bill)
Tamil Nadu Solar Subsidies
- Central PM Surya Ghar: up to ₹78,000
- Tamil Nadu state subsidy: ₹20,000–40,000 for residential
- Special subsidy for SC/ST families: up to ₹60,000 additional
Chennai Solar Advantage
- Solar irradiance: 5.6–6.0 kWh/m²/day
- Sunny months: 10+ months of good generation
- TANGEDCO tariff: ₹5–9/unit
- Payback period: 3–5 years
Find Solar Installers in Chennai
View verified solar companies in Chennai on GoSolarIndex — including TANGEDCO-empanelled installers who can handle your subsidy application.