Buy from verified suppliers in Chennai, Tamil Nadu. Compare prices, get free quotes, PM Surya Ghar subsidy ₹78,000.
Electricity costs ₹5.5–8/unit via TNPDCL. See your payback period in seconds.
Most homes in Chennai need a 2–5 kW system. Panel prices in 2026 are about ₹24–32 per watt for Mono PERC and ₹28–36 per watt for TOPCon (before 5% GST). For a subsidised home system, choose DCR panels from an ALMM-listed manufacturer — non-DCR panels do not qualify for PM Surya Ghar.
| Type | Price (ex-GST) | Best for |
|---|---|---|
| Mono PERC | ₹24–32/W | Lowest cost, good for most rooftops |
| TOPCon | ₹28–36/W | Higher output in heat, lower degradation |
| Bifacial | ₹30–38/W | Extra yield on raised or light-coloured roofs |
| HJT | ₹38–55/W | Premium; best temperature performance |
A 3 kW rooftop system in Chennai generates about 360 units a month. At TNPDCL's tariff of ₹5.5–8/unit, that saves roughly ₹2,400 a month (₹28,800 a year). After the ₹78,000 PM Surya Ghar subsidy, a 3 kW system costs about ₹82,000–1,32,000, so it pays back in roughly 2.8–4.6 years. TNPDCL handles net metering in Chennai, Tamil Nadu; your installer usually files the application. Get a precise figure with the solar calculator.