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.
For a grid-connected home in Chennai, an on-grid (string) inverter matched to your panel capacity is the usual choice — about ₹25,000–40,000 for 3 kW. A hybrid inverter costs more but lets you add a battery for power cuts. Solar inverters attract 5% GST.
| Type | How it works | Note |
|---|---|---|
| On-grid | Net metering with TNPDCL | No backup during power cuts |
| Hybrid | Grid + battery backup | Higher cost; needs a battery |
| Off-grid | No grid connection | Battery-dependent; for remote sites |
| Micro-inverter | Per-panel conversion | Good for shaded or split roofs |
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.
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