Solar Panel Installation in Pammal

We model both your domestic and commercial connection before recommending either

Pammal mixes independent housing with small industrial and workshop units, often on the same street and sometimes in the same building. That raises a question with real money attached: which tariff category your connection sits in, because it decides whether you can claim the subsidy at all.

Residential

Solar for Pammal homes

Independent houses on domestic connections

Typically install 3 kW to 4 kW and claim the subsidy normally.

Mixed properties

Need the connection and tariff question answered before design.

Apartment blocks

Follow the association route for common-area systems.

Older properties

May have sloped sections needing pitch mounting.

Commercial and industrial

Solar for Pammal businesses

Small industrial and workshop units

Modest roofs, commercial tariffs, and the depreciation question dependent on taxable profit.

Trade and service premises

Daytime load matching generation reasonably well.

Retail on the main roads

Evening-weighted and usually leased.

Schools and institutions

Strong term-time daytime match.

Check the airport height limit before raising the array

Airports Authority of India publishes colour coded zoning maps that split the land around an airport into grids of about 3 sq km. Each grid has a permissible top elevation, measured above mean sea level. Your local body can approve anything below that figure. Above it, or anywhere in a red grid, an AAI no objection certificate is needed through its NOCAS portal. To get the headroom above ground, subtract your site elevation, roughly 47 m in Pammal, from the grid figure. An elevated solar structure adds to the building's top height, just as a water tank does. So on a building already close to its limit, we keep the array low on the slab instead of raising it, and we check the figure on NOCAS before design.

Tannery and workshop units: size for daytime use, not export

Leather and tannery units are part of Pammal's economy, and the Pallavaram tanners' common effluent treatment plant at Nagalkeni, commissioned in 1995 with a design capacity of 3,000 cubic metres a day, serves about 144 member tanneries. These units sit on non-domestic connections, which are on net feed-in. Exported units are credited at ₹3.61 a unit up to 10 kW and ₹3.37 from 11 to 150 kW, well below what a commercial connection pays to import. So the system should match the load that actually runs in daylight shifts, read from twelve months of bills, rather than fill the roof. Every unit used on site is worth far more than a unit sent to the grid.

After Michaung: keep the inverter above the water line

When lakes in the Tambaram area overflowed on 4 December 2023, Pammal was among the low-lying localities that flooded, and local resident groups ran their own rescue and relief work. Panels on the roof are not at risk from that. The inverter, the AC distribution board and the cable joints are. In Pammal we mount them on an upper floor wall or in the terrace stair room, never in ground floor parking. Cables drop from the terrace instead of running along the ground. If water entered your ground floor in 2023, treat that mark as the minimum height for any solar equipment, and add a margin above it.

A Pammal sizing example

The state rooftop calculator puts Chengalpattu district at 1,580 units per kW a year, about 4.3 units a day. A 3 kW system here makes about 4,740 units a year, and a 5 kW system about 7,900. A 3 kW home system costs about ₹2,10,000 before subsidy and about ₹1,10,000 after the ₹78,000 central subsidy and the ₹22,000 Tamil Nadu top-up. Single-phase supply is limited to 4 kW, so a 5 kW system needs a three-phase connection. What remains on the bill is mainly the network charge on generation, about ₹0.32 a unit for homes up to 10 kW.