Question 1

How much does a 3.5 kW solar system cost in Chennai?

Accepted Answer

Around ₹2.35 to 2.45 Lakh before subsidy. After the PM Surya Ghar subsidy of ₹78,000, the net cost comes down to ₹1,57,000–1,67,000, with a payback of 3 to 4 years. A 3.5 kW system suits most 2–3 BHK homes.

Question 2

Is the government subsidy actually credited? How does it work?

Accepted Answer

Yes — it's credited directly to your bank account, not as a discount on the invoice. ₹30,000 for 1 kW, ₹60,000 for 2 kW, ₹78,000 for 3 kW and above. Heliostrom handles all the paperwork and portal registration.

Question 3

In how many years will the investment pay back?

Accepted Answer

For a residential on-grid system after subsidy: typically 3 to 4 years. Hybrid systems are broadly similar. After payback, you get free power for the remaining 20+ years of the system's life.

Question 4

Are there any charges not included in the quote?

Accepted Answer

Our quote covers everything — panels, inverter, structure, wiring, net meter application, and subsidy filing. If your roof needs civil work or cable runs beyond 30 metres, we'll tell you at the site survey before you commit to anything.

Question 5

How long does the whole process take?

Accepted Answer

Physical installation takes 1 to 2 days. Getting everything commissioned with TANGEDCO net metering usually takes 3 to 6 weeks — most of that is the TANGEDCO approval process, which we track and follow up on for you.

Question 6

Will there be any disruption at home during installation?

Accepted Answer

Very little. The team works on the rooftop. There's one planned power shutdown of about 30 to 60 minutes for the final electrical connection — scheduled at a time that works for you.

Question 7

Do I need to go to TANGEDCO or any government office?

Accepted Answer

No. We handle the PM Surya Ghar portal, TANGEDCO net meter application, and TEDA registration entirely. You give us the documents — Aadhaar, EB consumer number, bank details — and we do the rest.

Question 8

What warranty comes with the system?

Accepted Answer

Panels: 25-year performance warranty from the manufacturer. Inverter: 5 years (extendable to 10). Mounting structure: 10 years. Our installation workmanship: 1 year. If anything needs warranty service, we manage the claim for you.

Questions About Solar? Here Are the Answers.

Cost and Subsidy

Installation and TANGEDCO

Call us. We'll give you a straight answer.