The Two Main Options for Rooftop Solar in Chennai
When installing rooftop solar in Chennai, you'll face one key decision: on-grid or hybrid? Each has distinct advantages depending on your power usage, grid reliability in your area, and budget.
On-Grid Solar System
An on-grid (grid-tied) system connects directly to the TANGEDCO grid. During the day, your solar panels generate electricity which powers your home. Any surplus is exported to the grid and credited to your account through net metering.
- Lower upfront cost (no batteries)
- Net metering credits reduce EB bill to near-zero
- 25-year system lifespan with minimal maintenance
- No power during grid outages (safety requirement)
On-grid is ideal for Chennai areas with reliable power supply like Anna Nagar, T. Nagar, Velachery, Adyar, and most of Coimbatore.
Hybrid Solar System
A hybrid system includes a battery bank that stores excess solar energy for use during evenings or grid outages. This is ideal for areas with frequent power cuts or for customers who want energy independence.
- Works during grid outages
- Stores daytime solar for evening use
- Higher upfront cost (batteries add ₹1.5L–₹3L)
- Battery replacement needed every 7–10 years
Hybrid systems cost 40–60% more than on-grid systems. Calculate whether the extra cost justifies the backup power benefit in your area.
Cost Comparison
| On-Grid 5kW | Hybrid 5kW | |
|---|---|---|
| System Cost | ₹2,80,000 | ₹4,20,000 |
| Subsidy | ₹78,000 | ₹78,000 |
| Net Cost | ₹2,02,000 | ₹3,42,000 |
| Monthly Savings | ₹5,500 | ₹5,500 |
| Payback Period | ~3 years | ~5.2 years |
Our Recommendation for Chennai
For most Chennai homeowners in well-supplied areas, on-grid is the smarter financial choice. The payback period is shorter, and TANGEDCO's grid reliability has improved significantly. Choose hybrid only if you experience 4+ hours of power cuts daily.
