Tiruppur is the largest industrial electricity market in our service area and the most awkward one to size a solar system for. The knitwear cluster runs a mix of loads that behave nothing alike — knitting machines that hum along steadily, dyeing houses with enormous thermal demand, and effluent plants that cannot be switched off — and a quote that treats them as one average number will be wrong in both directions. Generation here runs about 4.36 units per kW on an average day, among the best in the region.
Yield figures are regional averages from published irradiance data, quoted as indicative ranges. What a particular roof produces depends on its orientation, shading and the equipment specified — which is what the site survey establishes.
Three load patterns sit side by side. Knitting floors draw a fairly flat load through long shifts, which is the easiest thing solar can serve. Garment stitching and checking is a daytime operation and matches generation almost perfectly. Dyeing and processing is the difficult one: the electrical load is dominated by pumping and compressed air, the thermal load is met by boilers that solar does not touch, and the Zero Liquid Discharge plants that the cluster is required to run draw power around the clock — including every hour when nothing is being generated. We say this plainly because it is usually left out: a ZLD plant is not a good standalone case for rooftop solar, and anyone presenting one as if it were is quoting against a number that does not exist at night.
The knitting sheds are generally wide-span steel with north-light glazing, which is good solar ground once the glazing is worked around. The constraint that catches people out is asbestos: a great many older units in and around the cluster still have asbestos cement sheeting, which is brittle, cannot be walked on safely and will not reliably carry a mounting system for twenty-five years. On those buildings the honest sequence is roof replacement first, solar second — and if a quote proposes mounting straight onto aged asbestos without saying so, that is a quote to put down. Newer pre-engineered sheds in the industrial estates need none of this caution and go up quickly.
At Tiruppur’s average yield, a 3 kW rooftop system — the size the PM Surya Ghar subsidy caps at — generates roughly 13.1 units on an average day and about 4,770 units a year. Residential rooftops of 3 kW and above qualify for the central subsidy of up to ₹78,000, subject to eligibility under the scheme, and Tamil Nadu announced a further top-up in September 2026 — our solar subsidy guide sets out what each one pays and how firm the state figure is.
Net metering is handled through Tiruppur distribution circle. We prepare and file that application as part of the installation; sanction typically takes 60 to 120 days from submission. Our net metering guide explains which arrangement you would be on and why it decides the size worth installing.
Partly, and the honest answer depends on which part of the bill. Your daytime electrical load — pumps, compressors, lighting — is exactly what solar offsets, at the full commercial tariff, so that portion is worth doing. Your boiler load is thermal and solar PV does not touch it, and your ZLD plant keeps drawing through the night when the array produces nothing. We would rather size against your actual daytime consumption from twelve months of bills than quote a percentage that looks impressive and does not survive contact with your meter.
Not responsibly, no. Asbestos cement becomes brittle with age, it is unsafe to work on, and it will not hold a mounting system for the life of the panels. The sensible route is to replace that roof with steel sheeting and install on the new surface — it costs more up front and it is the only version of this that still works in year fifteen. We will tell you which parts of a campus are suitable as they stand and which are not.
Not with a standard grid-tied system, which shuts down when the grid goes — a safety requirement, so that it cannot feed a line someone is working on. Running through an outage needs batteries or a hybrid inverter, which changes the economics substantially. For most units here the generator stays the answer for outages and solar is about the bill, not about backup.
Under net feed-in, surplus units are exported to TNPDCL and settled at the applicable rate rather than banked one-for-one against what you draw later. For a unit that closes on Sundays that matters, and it is one reason we size against working-day consumption rather than installed roof area. The Tiruppur distribution circle handles the metering.
It is the closest major industrial market to Sankagiri and well within routine travelling distance. Surveys, installation and later service calls are ordinary here, not exceptions.
VENAARC installs across Tiruppur district from our base in Sankagiri. Listing an area means we travel there and work there — it is not a claim that a plant has been built in every town named on this site.
The survey is free and there is no quote until someone has seen the roof. Call +91 7871631474 or send the details and we will come out to you.