Solar Panel Installation in Chennai: Frequently Asked Questions for 2026

Solar panel installation in Chennai generates a steady stream of questions before anyone signs. This page collects the ones that come up most often in site visits and over the phone, with plain answers.

How much does solar panel installation in Chennai cost?

A complete 3 kW grid-tied rooftop plant — panels, structure, inverter, DC wiring, earthing, and labour — typically falls between ₹1.5 lakh and ₹2.1 lakh before subsidy. A 5 kW system is roughly ₹2.3 lakh to ₹3.2 lakh. Those numbers assume quality Tier-1 panels and a string inverter with a warranty you can actually use. The installation cost guide breaks these down by system size.

Is there a government subsidy?

Yes. Eligible residential homeowners can receive a central government subsidy of up to ₹78,000 for systems up to 3 kW, and a proportionally lower amount per additional kilowatt beyond that. Approval and disbursement follow the PM Surya Ghar scheme rules and go through the local DISCOM, which in Chennai is TANGEDCO. The subsidy does not arrive on the day of installation; it is applied after the system passes inspection and the net meter is commissioned. Your installer should file the application — if they do not, ask who is responsible before you sign.

How long does the installation take?

Physical installation on a standard 3 kW system takes one to two working days once the structure design is ready. The full timeline from first site visit to live generation is usually two to four weeks, most of which is TANGEDCO paperwork and net meter scheduling. Delays are common at the meter stage, not on the roof. A local installer who knows the sub-division office can often move this faster than a national brand coordinating from another city.

Do I need to give up my EB connection?

No. Almost every Chennai residential installation is grid-tied. You keep the EB connection. The solar system feeds your home during daylight. Surplus units go into the grid and are credited on your bill through net metering. At night, or when solar is not enough, you draw normally from TANGEDCO. Going solar does not mean giving up EB explains how the billing actually works.

What is the minimum roof size needed?

A 1 kW system needs roughly 10 square metres of unshaded terrace, though the structure footprint and walking clearance add to that. A practical 3 kW plant works comfortably on a 30–35 sq metre shadow-free area, oriented south or south-west. Chennai independent houses in Madipakkam, Medavakkam, and Velachery commonly have enough flat terrace for 3–5 kW without awkward workarounds. Smaller terraces and partial shade are discussed in small-terrace solar.

How do I compare solar installation quotes in Chennai?

Any two quotes for the same kilowatts can represent very different jobs. Line them up on: panel make and model (not just wattage), inverter brand and warranty, structure gauge, DC cable specification, earthing and surge protection, and whether TANGEDCO filing is included. A quote that lists only 'solar system 5 kW' with a single price is not comparable. The quote comparison guide lists the full checklist.

What warranty should I expect?

Tier-1 panels typically carry a 25-year performance warranty (80% output at year 25) and a 10-year product warranty covering defects. String inverters usually have a 5-year manufacturer warranty, extendable to 10. The mounting structure should be warranted against rust for at least 5 years if it is hot-dip galvanised. Labour warranty is separate and varies by installer — clarify before you sign.

How do I get started?

Start with a free site inspection. Bring twelve months of EB bills, your sanctioned load, and a rough idea of which part of the terrace you think is shaded. The installer should do the rest. For solar panel installation in Chennai or Madipakkam, call +91 9042517415 or request a quote online.