Terrace solar for apartment schemes in Ahmedabad.
An Ahmedabad apartment scheme pays one common bill for lifts, borewell and transfer pumps, parking lights and the clubhouse. A terrace plant on the society's own connection brings those units down. We read that bill, survey the roof, give the managing committee a written proposal, and file with Torrent Power or UGVCL.
Book a terrace survey for your scheme
Share the common-area bill, tower count and floors. We call the secretary or chairman and fix a survey slot that committee members can attend in person.
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The short answer
Yes, an Ahmedabad housing society can put solar on its terrace and connect it to the common meter that feeds lifts, pumps and lighting. Each kW yields 4 to 4.5 units a day here. Torrent Power bills most societies inside the city; UGVCL bills some western and eastern fringe areas. For the common facilities, MNRE's PM Surya Ghar operational guidelines (June 2024) set central support for RWAs and group housing societies at ₹18,000 per kW. That support is capped at 3 kW per house and 500 kW.
Last reviewed 2 October 2026 · Heaven Green Energy engineering team
Where an Ahmedabad scheme's common units go
The units that matter sit on the society's connection, not in the flats. That common bill funds the building's shared machinery through maintenance, and it is the bill a terrace plant is designed to shrink.
Ahmedabad's apartment stock comes in two broad shapes. Older parts of the city, such as Paldi, Naranpura and Maninagar, have low walk-up blocks with a staircase light, a pump and little else on the common meter. The newer schemes are different. Along SG Highway and in Thaltej, Bodakdev, Gota and Chandkheda, and out towards Bopal and Shela, developers have built multi-tower complexes with lifts, basements, clubhouses and pools.
Those schemes run a heavy common bill, and much of it is daytime load. Lifts work through the day, transfer pumps fill overhead tanks, and the clubhouse and gym open in working hours. That suits solar well, because units used on site while the plant generates never touch the export account at all.
There is a constraint that tall schemes share. A tower roof is crowded with lift machine rooms, overhead tanks, telecom equipment and fire-water pipework, and neighbouring towers cast shade at certain hours. The usable area is usually much smaller than the slab. We map it with a shadow study before quoting a size, because a plant drawn on the full roof outline is a plant the terrace cannot hold.
Lifts in multi-tower schemes
A complex with four or six towers may run eight or more lifts, often the largest line on its common bill. Lift demand peaks around school and office hours, much of it while the sun is up. The plant offsets their monthly units through the meter rather than powering any one lift directly.
Borewell, sump and booster pumps
Many schemes pump from a borewell or a municipal sump into overhead tanks, and boosters hold pressure on the top floors. A committee that sets filling for late morning on a timer moves that load into generating hours, so more solar is consumed on site and less is banked.
Parking, podium and compound lighting
Basement parking in newer towers often needs lighting and exhaust fans for much of the day, while podium, gate and compound lights run all night. The night share is carried by credits from midday export. Converting old fittings to LED first shrinks the plant the committee has to fund.
Clubhouse, pool and EV charging
Clubhouse air conditioning, pool filtration pumps and the gym sit on the common connection in most new schemes. EV chargers in the basement are the newest addition. Tell us what the committee expects to add, because sizing for that load now costs less than a second plant later.
Counting the plant in units, not rupees
Measure a society plant by the units it takes off the common bill. What each unit is worth depends on the tariff category printed on your own bill, so the treasurer does that sum with us, bill in hand.
Start from the units. In Ahmedabad a 50 kW plant gives about 200 to 225 units a day, which is roughly 73,000 to 82,000 units over a year. A 25 kW plant gives about 36,500 to 41,000 units. Lay those figures next to twelve months of common-area bills and you see what share of the shared load the terrace can carry. Monsoon months generate less, and the banked credits from the dry months cover part of that gap.
The connection sets the ceiling. Torrent Power or UGVCL checks the plant against the sanctioned load on the society's common connection and the capacity of the local transformer. A scheme that has added lifts, a pool or EV points since possession may be running above its original sanction. If so, a load revision comes first, and we flag it at the survey rather than after the application is returned.
Tax works differently for a society. A business claims 40% accelerated depreciation on solar power generating systems under Appendix I of the Income Tax Rules. A cooperative housing society, however, rarely has business income to set it against. Ask your auditor before counting on it. GST has been 5% on solar equipment since 22 Sep 2025, with 18% on the 30% service share of a supply-and-install contract, about 8.9% blended. A 25 kW plant falls in the ₹10.75 lakh to ₹13.50 lakh market band, roughly ₹43,000 to ₹54,000 per kW at that size. Larger plants are priced after a load study.
Central support scales with the houses. Under MNRE's PM Surya Ghar operational guidelines (June 2024), a scheme's resident body claims ₹18,000 per kW on capacity serving its common facilities. That body may be an AOA or a cooperative housing society. The supported capacity is limited to 3 kW per house and 500 kW overall, so in a scheme of more than 166 houses the 500 kW ceiling binds first. Rooftop plants that members have already put up for their own flats are counted inside that limit. Non-DCR modules anywhere in the plant forfeit the support.
| Plant size | Units a year |
|---|---|
| 25 kW | 36,500 – 41,063 |
| 50 kW | 73,000 – 82,125 |
| 100 kW | 1,46,000 – 1,64,250 |
| 250 kW | 3,65,000 – 4,10,625 |
| 500 kW | 7,30,000 – 8,21,250 |
Indicative installed cost at 25 kW: ₹10.75–13.50 lakh (market range, not a quotation). Larger plants are priced after a load study of your bills and roof.
This is what we actually build.
Heaven Green Energy installations across India. Not stock photography, and not renders.
Engineering a plant on a tower roof
Three checks decide whether a scheme's terrace can carry a plant safely. They are how much shade-free area is left, what the slab and parapet can bear, and how the common connection is wired.
Usable area after the clutter
We draw every lift room, tank, telecom mast, solar water heater and pipe run on the roof plan, then model shade from neighbouring towers through the day. In multi-tower schemes the adjacent block is often the biggest shading source in winter mornings. Only the area left after that exercise counts towards the plant size.
Structure, wind and access
A tower roof sees stronger gusts than a bungalow terrace, so the mounting is designed for wind load at that height and anchored without breaking the waterproofing. We keep walkways for tank cleaning and fire access, and plan lifting of modules and steel so lifts and stair cores are not damaged in the process.
Wiring to the common meter
Cable runs from roof to the meter room can be long in a tall building, so we size conductors to hold voltage drop down. Where a scheme has several common connections, we confirm which one carries the most daytime load before connecting. Earthing, surge protection and an isolator the licensee can inspect come as standard.
Approvals: who does what.
Two approvals sit behind every society plant: the committee's decision inside the scheme and the licensee's approval outside it. We prepare the papers for both and attend the inspection.
Committee resolution
We give the managing committee a written proposal with roof layout, unit estimate and bill of materials, so it can be tabled at a meeting. The society passes its resolution and authorises a signatory under its own bye-laws.
UsLicensee application
We file on the society's common consumer number with the licensee named on its bill, attaching the single-line diagram, equipment datasheets and the authorisation. The licensee then reviews sanctioned load and transformer capacity for feasibility.
Us, then Torrent Power or UGVCLInstallation
Once feasibility clears, we install. Work is scheduled around residents: noisy drilling in daytime hours, lifts protected during material movement, and the terrace kept accessible for tank and fire checks throughout the job.
UsInspection and net meter
The licensee inspects earthing, protection and the isolator, then replaces the common meter with a bidirectional one. Export credits run from commissioning. Our engineer is on the roof when the inspector is.
Torrent Power or UGVCLThree ways to fund the plant.
A society pays from its corpus, from a special levy on members, or through a loan. Which suits you depends on the corpus balance and how the members vote.
Pay from the sinking or repair fund
Schemes with a healthy corpus can fund the plant outright, and the lower common bill then eases future maintenance demands. Check the bye-laws first, because some restrict what the repair fund may pay for. The committee usually needs a general body resolution before spending from it.
One-time levy on flat owners
Where the corpus is thin, the cost is split across flats, often by carpet area as maintenance already is. A clear unit estimate and a written bill of materials are what persuade a general body. We attend the meeting if the committee asks, and answer members' questions on the roof.
Loan to the society
Some banks and finance companies lend to registered societies for solar, repaid from the maintenance account. Terms vary by lender and by the society's records. We can introduce finance partners, but the committee should compare their terms with its own bank before choosing.
How the project runs.
Five stages take a scheme from its first enquiry to an exporting net meter, with the licensee's own steps shown.
Where we work from
Heaven Green Energy's only office is at Mota Varachha, Surat. We do not have an Ahmedabad branch. Our channel partner network and field engineering team serve societies in Ahmedabad. They carry out terrace surveys, supervise installation and deal with Torrent Power or UGVCL on the ground. We tell committees this before they sign.
Bill and roof check · Day 1–3
We read twelve months of common-area bills, note the licensee and sanctioned load, then walk every tower roof with a committee member present and log tanks, lift rooms and shade.
Committee proposal · Day 4–7
A written proposal follows: plant size, roof layout, unit estimate, bill of materials and price. It is set out so the committee can table it at its next meeting.
Resolution and filing · Set by the society
Once the society passes its resolution, we file with Torrent Power or UGVCL on the common connection. Any load revision the connection needs is raised in this stage.
Installation · 1–3 weeks
After feasibility clears we install, working tower by tower so residents keep roof access. Time on site depends on plant size, crane or lift access and the number of towers.
Inspection and handover · Set by the licensee
The licensee inspects and fits the bidirectional meter. We hand the committee warranty papers, a monitoring login and a cleaning schedule for the dusty months.
What businesses say after a year.
We have no society reviews from Ahmedabad to show yet. These are real Heaven Green customers, labelled with the city each system was actually installed in.
From first call to generation start: 28 days. On-site engineer answered every question. Post-installation monitoring app is excellent.
Residential · Ahmedabad · 3 kW
Our showroom AC bills used to be ₹38k/month. After 25 kW solar, it's ₹3,500. 25-year warranty paperwork was registered same day. Smooth experience.
Commercial · Ahmedabad · 25 kW
Booked the site visit on Friday, got a full proposal with shadow analysis on Monday. The drone survey caught a chimney shadow our previous quote missed.
Residential · Surat · 4 kW
Six things to check with any vendor.
- Read the licensee's name on the common-area bill before anything else. Torrent Power bills most of the city, but UGVCL bills some schemes on the fringe.
- Size the plant on twelve months of common units, not on the roof outline. Tower roofs lose much of their area to tanks, lift rooms and shade.
- Check the common connection's sanctioned load early. Schemes that added lifts, pools or EV chargers may need a load revision before approval.
- Move pump filling into late morning where you can. Units used on site while the plant generates never pass through the export account.
- Get a general body resolution and a named signatory before filing. The licensee application is made in the society's name, not a member's.
- Budget central support at ₹18,000 per kW, capped at 3 kW per house and 500 kW, as MNRE's PM Surya Ghar operational guidelines (June 2024) set out. Members' own rooftop plants count against that cap.
Housing society solar in Ahmedabad, answered.
Cost & output
How much does a housing society solar plant cost in Ahmedabad?
How many units will a society plant produce in Ahmedabad?
What size plant does our scheme need?
Licensee & approvals
Is our society billed by Torrent Power or UGVCL?
Can a society get PM Surya Ghar support for common areas?
What does the licensee need from the society?
Roof & engineering
Our tower roof is full of tanks and lift rooms. Is solar still possible?
Will mounting the plant damage our terrace waterproofing?
How do Ahmedabad's dust and heat affect a society plant?
Finance & tax
Can our society claim accelerated depreciation?
What GST applies to a society solar plant?
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