Chennai solar guides

Sizing & Installation

Panel counts, roof area and land for every system size, plus what happens on install day.

Showing 1–12 of 48 articles in Sizing & Installation

Homeowner photographing newly installed rooftop solar panels with a phone on a Chennai terrace, an installer beside them

Sizing & InstallationTNEB Solar Portal (USRP): Registration, Photo Upload, PCR and Application StatusSeptember 29, 202610 min read

How the TNPDCL Unified Solar Rooftop Portal works in 2026: registration, the plant photo and PCR upload, application status, and what to do when it stalls.

Overhead view of two neighbouring Chennai rooftops, a small solar array on a home and a larger one on a workshop

Sizing & InstallationTNEB Solar CFA vs Non-CFA: Which Application Route Should You Choose?September 29, 202610 min read

CFA is the subsidy route on the TNEB solar portal, non-CFA is the direct route with no subsidy. Who must use which, what differs, and how to decide.

Aerial view of colourful terraced houses in a Chennai neighbourhood, one rooftop fitted with a new solar array

Sizing & InstallationTamil Nadu State Solar Subsidy 2026: The ₹1 Lakh Rooftop Top-Up ExplainedSeptember 29, 202611 min read

Tamil Nadu adds up to ₹22,000 to PM Surya Ghar, ₹1 lakh in all at 3 kW. Who qualifies, the 5 August cut-off, how TEDA pays and what to do if it is late.

A standalone solar panel on a steel frame beside a green paddy field, with water pouring from a pipe into an irrigation channel

Sizing & InstallationSolar Pump Subsidy in Tamil Nadu: The Two Schemes, Who Qualifies, and How to ApplySeptember 27, 20266 min read

Tamil Nadu farmers can get 70 to 80 percent off a standalone solar pump under the Chief Minister's scheme and PM-KUSUM. Who qualifies, pump sizes, and where to apply.

Overhead power distribution lines on a concrete pole running past a factory roof covered with solar panels

Sizing & InstallationNetwork Charges on Rooftop Solar in Tamil Nadu: Who Pays, How Much, and How They Are Worked OutSeptember 27, 20267 min read

Tamil Nadu charges rooftop solar owners for using the grid. The TNERC rates, the 20 percent domestic rate, the 50 percent MSME cut, and a worked example of the monthly cost.

Aerial view of a large solar park in southern Tamil Nadu with wind turbines on the horizon

Sizing & InstallationTamil Nadu Solar Energy Policy: What Actually Applies to Your Rooftop in 2026September 27, 20268 min read

The 2019 state solar policy, the TNERC regulations that really govern rooftops, network charges, the 2024 draft rules and the new state top-up, in one place.

An hourglass on a sunlit windowsill with rooftop solar panels visible through the window behind it

Sizing & InstallationPM Surya Ghar Last Date: Is the Scheme Ending, and What Happens After March 2027September 27, 20267 min read

The scheme runs until 31 March 2027. What that date means for your application, what the extension reports say, the latest progress, and Tamil Nadu's new top-up.

A glowing light bulb in a home interior, with rooftop solar panels in bright sun visible through the window

Sizing & InstallationIs PM Surya Ghar Free? What "300 Units of Free Electricity" Actually MeansSeptember 27, 20266 min read

PM Surya Ghar does not give you 300 free units. It subsidises panels that make them. What you pay, how many units your roof produces in Tamil Nadu, and why the bill is not zero.

A man seen from behind on a rooftop terrace holding a phone to his ear, looking at a row of solar panels

Sizing & InstallationPM Surya Ghar Complaint: How to Raise a Grievance, and Where Each Problem GoesSeptember 27, 20267 min read

How to raise a PM Surya Ghar complaint on the portal or helpline 15555, the 30-day resolution rule, and which problems go to the vendor, the DISCOM or a consumer forum.

Two people shaking hands on a sunny rooftop, with rows of solar panels behind them

Sizing & InstallationPM Surya Ghar Agreement Format: What You Sign With Your Vendor, Clause by ClauseSeptember 27, 20268 min read

The model agreement MNRE publishes for consumer and vendor, read clause by clause. What the vendor must do, what you must do, and what to add before you sign.

Two men on a Tamil Nadu terrace, one pointing at a row of newly installed rooftop solar panels, coconut palms beyond

Sizing & InstallationPM Surya Ghar Vendor List: How to Find, Check and Choose a Registered VendorSeptember 27, 20268 min read

The subsidy is only paid through a vendor registered on the National Portal. Where the vendor list is, what registration proves, what it does not, and how to choose.

Aerial view of a Chennai neighbourhood with some flat roofs covered in solar panels and others bare

Sizing & InstallationPM Surya Ghar Eligibility: Who Can Claim the Subsidy, and Who CannotSeptember 27, 20266 min read

The scheme's actual eligibility rules from the MNRE guidelines: residential connection, DCR panels, grid connection. Tenants, SC/ST, age limit, second homes and businesses answered.