Industrial rooftop solar for factories in Ahmedabad.
Ahmedabad's factories sit on two different licensees, and the estate you are in decides which one reviews your solar file. We design shed-roof plants for units across Vatva, Naroda, Changodar and Sanand, using modules from an authorised channel partner of Adani and Qbits inverters. We then file the papers with Torrent Power or UGVCL.
Book an Ahmedabad factory survey
Send a recent bill and the estate and plot number. An engineer calls back, confirms your licensee and lists the drawings and records to keep ready.
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The short answer
Industrial rooftop solar in Ahmedabad produces 4 to 4.5 units per kW each day, so a 500 kW shed plant yields roughly 7.3 to 8.2 lakh units a year. Torrent Power reviews the file inside its city licence area; UGVCL handles Changodar, Sanand and other district estates. Factories claim 40% accelerated depreciation. Plants above 25 kW are priced only after a load study.
Last reviewed 2 October 2026 · Heaven Green Energy engineering team
One district, several estates, two licensees
Ahmedabad's factory belts differ in age, roof stock and grid supplier. The planning question for solar is the same everywhere: how much of your daytime draw can the roof carry, and which licensee signs the connection.
The older estates sit on the city's eastern and south-eastern edge. Vatva GIDC and Naroda GIDC are long-established GIDC estates, and Naroda appears among GIDC's chemical estates. Units there often run reactors, dryers, effluent pumps and compressors through the day. Older sheds are common, so the survey starts with the sheeting and purlins, not the panel count.
West of the city the picture changes. Changodar is an industrial belt beyond the city limits, served by UGVCL's Changodar sub-division under its Bopal division. Further out, Sanand GIDC serves a manufacturing hub where GIDC has acquired around 5,000 acres, and GIDC tells Sanand plot holders to apply to UGVCL for power. Newer buildings here usually have larger, cleaner roof spans.
So an Ahmedabad postal address does not settle the licensee. Torrent Power distributes inside its Ahmedabad licence area; UGVCL supplies most of the rest of the district. UGVCL also runs Naroda and Naroda Urban sub-divisions, which is why a Naroda unit should read its bill header before anyone drafts a single drawing.
Chemical and process units
Batch reactors, dryers, chillers and effluent treatment pumps draw steadily from morning shift to evening. That profile suits solar well, because most of the plant's output is consumed on site as it is generated. Corrosive fumes near vents change the choice of structure coating and module spacing.
Engineering and fabrication shops
Machining centres, welding sets and air compressors create peaky loads that rise and fall with job orders. Solar shaves the daytime base rather than the peaks. We size against the lowest steady daytime draw in your bills so that exports stay small and predictable.
Textile and garment units
Looms, processing machines and humidification run long hours across the year. Shed roofs in older textile belts are often asbestos or thin sheeting, so the plant may need a walkway layout or a separate structure. Dust from processing also raises the cleaning frequency we plan for.
Auto components and newer plants
Sanand and Changodar factories often have pre-engineered buildings with long, uniform spans and higher sanctioned loads. These roofs take larger plants with simple layouts. The constraint shifts from roof strength to export rules, because daytime demand may still fall below output on weekends.
How the numbers work for an Ahmedabad factory
A factory plant pays back through units it avoids buying during the day. Rupee figures depend on your own tariff category, so we work in units first and price the plant only after reading your bills.
Start with generation. Each installed kW in Ahmedabad produces 4 to 4.5 units a day across the year, or about 1,460 to 1,640 units annually. A 100 kW plant therefore gives 1.46 to 1.64 lakh units a year, and a 500 kW plant 7.3 to 8.2 lakh. These figures assume a clean, shadow-free roof facing roughly south.
Next, match that output to your daytime draw. A unit running two shifts consumes nearly all of its solar output on site. A single-shift unit that shuts on Sundays exports more, and the value of exported units depends on the GERC order in force on your commissioning date. We plot your consumption against expected generation hour by hour. We also check sanctioned load and contract demand, because they limit the plant size the licensee will accept. Solar trims the energy you draw but rarely cuts the peak demand charge.
Then the tax position. Solar power generating systems qualify for 40% accelerated depreciation under Appendix I of the Income Tax Rules, which our depreciation guide sets out. Since 22 September 2025, GST is 5% on solar equipment and 18% on the 30% service share of a supply-and-install contract, about 8.9% blended. For a 25 kW plant, the Gujarat market band is ₹10.75 lakh to ₹13.50 lakh, about ₹43,000 to ₹54,000 per kW. Anything larger is priced after a load study.
| 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 shed-roof plant in Ahmedabad
Most failures on factory roofs come from the building, not the panels. We check the roof, the structure and the electrical connection before we commit to a plant size.
Roof condition and type
We record sheeting type, gauge, age, fixings and any leaks, then map vents, skylights and chimneys that cast shade. Old asbestos or rusted sheeting in the eastern estates may need replacement or a raised structure first. If the roof cannot carry the plant safely, we tell you before the proposal.
Structure, wind and safety
Purlin spacing and section decide how the mounting rail transfers load. Our design checks dead load and wind uplift for the site, with galvanised steel or aluminium chosen for the local air. We plan walkways, lifelines and access points, because cleaning crews walk this roof for twenty-five years.
Electrical design and approvals
We draw the single-line diagram from your panel schedule, place inverters near the main board and size cables for low losses. Protection, earthing and isolation follow the licensee's technical requirements. The same file then goes to Torrent Power or UGVCL, along with the electrical inspector's clearance where the plant size requires it.
Approvals: who does what.
The approval path follows your licensee, not your street address. We confirm Torrent Power or UGVCL from the bill header first, then prepare the file in that licensee's format.
Load study and plant design
We read twelve months of bills, sanctioned load and connection category, survey the roof, then fix plant size, layout and single-line diagram. A wrong sanctioned load in this file is the commonest reason a factory application is returned.
UsApplication to the licensee
We submit the rooftop application on your consumer number with drawings and equipment details. The licensee checks feasibility against your load and the local transformer. Torrent Power and UGVCL each use their own portal and format.
Us, then Torrent Power or UGVCLInstallation and inspection
We install only after technical approval. On completion we arrange the inspection, with our engineer present to answer questions on earthing, isolation and protection settings. Any electrical inspector clearance needed for the plant size is obtained before metering.
UsMetering and synchronisation
The licensee fits or seals the net or bidirectional meter and authorises synchronisation. Billing then nets your exports and imports under the GERC order applicable to your connection. We hand over the commissioning records for your files.
Torrent Power or UGVCLThree ways to fund the plant.
Factories usually fund solar through cash, a term loan or an MSME loan. The choice depends on your tax position and existing credit lines, not on the plant itself.
Own capital
Paying from reserves gives you the full 40% accelerated depreciation in the year the plant is put to use. How much you claim in the first year depends on when the plant is put to use, so your accountant should confirm the timing against your financial year.
Term loan or MSME credit
Banks lend against solar as plant and machinery, and many MSMEs add it to an existing working capital or term loan relationship. The loan does not change the depreciation claim. We supply the proposal, bill of materials and generation estimate that a bank's credit team asks for.
Staged plants
If capital is tight, you can install the strongest roof sections first and extend later. We design the first stage so the inverter room, cable routes and earthing can take the second stage. Each extension still needs a fresh application to your licensee.
How the project runs.
From first bill to synchronised plant, an Ahmedabad factory project follows five stages. Licensee timelines vary, so we track each step openly.
Where we work from
Heaven Green Energy has one office, at Mota Varachha in Surat. We do not have a branch in Ahmedabad. Factory projects in the district are run by our engineering team travelling from Surat, with our channel partner network supporting surveys and site supervision. We tell you who will be on your roof before you sign.
Bills and licensee check · Day 1 to 2
You send twelve months of bills and your plot details. We confirm Torrent Power or UGVCL, read sanctioned load and daytime consumption, and tell you if a survey is worth doing.
Roof and load survey · Week 1
Engineers inspect sheeting, purlins, shade and the main panel. We log vents, skylights and access points, then measure usable area against your daytime load pattern.
Design and proposal · Week 2
You receive the plant layout, single-line diagram, generation estimate in units and a written bill of materials. Price follows the load study, never before it.
Approval and installation · Licensee dependent
We file the application, wait for technical approval, then install. Work is planned around your shifts so production is not stopped for roof access or shutdowns.
Inspection and handover · After installation
The licensee inspects and meters the plant. We commission it, hand over records and monitoring access, and start the maintenance schedule agreed in your contract.
What businesses say after a year.
These reviews come from factory and business owners in Bharuch, Surat and Ahmedabad. Each one is shown with the city where the plant was actually installed.
250 kW industrial system on our chemical plant. Generation has been 8% above estimate every month. Their O&M team is responsive.
Industrial · Bharuch · 250 kW
150 kW at our textile factory dropped power costs by 68%. The ROI calculation they provided was spot-on, break-even under 4 years.
Commercial · Surat · 150 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
Six things to check with any vendor.
- Your bill header, not your postal address, tells you whether Torrent Power or UGVCL reviews the file.
- Each kW produces 4 to 4.5 units a day; a 500 kW shed plant yields about 7.3 to 8.2 lakh units a year.
- Size the plant to your steady daytime draw, checked against sanctioned load and contract demand.
- Older roofs in Vatva and Naroda need a sheeting and purlin check before any layout is drawn.
- Solar systems qualify for 40% accelerated depreciation; GST on a turnkey plant is about 8.9% blended.
- Plants above 25 kW are priced only after a load study, so treat any instant quote with caution.
Industrial solar in Ahmedabad, answered.
Cost & output
How much will a factory solar plant cost in Ahmedabad?
How many units will a 100 kW plant generate?
Will you tell me how much money I will save?
Licensee & approvals
Is my Ahmedabad factory on Torrent Power or UGVCL?
How is Torrent Power net metering for industrial connections handled?
Can I install a plant larger than my sanctioned load?
Roof & engineering
Can solar go on an old asbestos or tin shed?
How much roof area does a factory plant need?
Will installation stop my production?
Finance & tax
Can my factory claim accelerated depreciation?
What GST applies to a factory solar plant?
About Heaven Green