Industrial solar EPC with the electrical side done properly

Industrial solar EPC, sized to your load

Captive solar for industrial plants, with the electrical side done properly.

Rooftop or ground-mount, designed from your own load and tariff, built with switchboards from our own works and commissioned by our engineers. Power at ₹2.5–3.5 a unit against ₹7.5–8.5 from the grid, on a self-consumption basis that does not depend on export rules.

Get a free feasibility study See what is included

₹3.0–3.8 Crper MWp rooftop, indicative

₹60–75 Lsaved per MWp per year, indicative

3–4 yrstypical payback on self-consumption, indicative

25 yrsmodule performance warranty

The AC side, from the inverter output to your main bus, is built and tested at Kotambi.

Built on ALMM-listed modules BIS-certified inverters IEC 61439 design-verified switchboards CEIG and DISCOM approvals handled

Scope

What a WTS solar EPC contract includes

One contract, one site team, one point of accountability from the first survey to the DISCOM synchronisation letter.

Design and yield studyShadow analysis, PVsyst yield at P50, structure and cable sizing, single-line diagram, protection study
SupplyModules, inverters, structure, DC and AC cables, earthing and lightning protection, from two approved vendors per item
WTS-built electricalACDB, PCC or interface panel, metering and zero-export relay, manufactured and factory-tested at Kotambi
InstallationStructure, module mounting, DC and AC works, with our own electrical crew and a daily safety brief
ApprovalsGEDA registration where applicable, DISCOM net-metering or captive application, CEIG inspection, synchronisation
Commissioning and handoverInsulation and string tests, protection tests, performance ratio test, as-built drawings, training, monitoring live
O&M, optionalCleaning schedule, preventive maintenance, performance reporting against the P50 figure, spares

Rooftop and ground-mount compared
Criterion	Rooftop	Ground-mount
Typical size	Smaller plants, up to a few MWp	MW-scale plants with land
Space needed	About 1 acre of roof per MWp	About 4 acres of land per MWp
Structure	Follows the shed pitch or fixed tilt on RCC; roof load check first	Fixed tilt, piled or ballast foundations
Cable run to bus	Short, inverters on the wall	Longer, may need an LT or HT evacuation panel
Cost per MWp	₹3.0–3.8 Cr, indicative	Similar, plus land development
Best for	Plants with sound roofs and daytime load	Larger plants with spare land

The economics, on a self-consumption basis

We size solar so that nearly all of it is consumed on site during the day. That way the saving is the tariff you avoid, and it does not depend on banking, export rates or net-metering rules that change.

1.5 MWptypical industrial system we design

~2.1 millionunits a year from 1.5 MWp in Gujarat, P50 indicative

₹95–115 Lnet saving a year after the solar's own levelised cost, indicative

3–4 yrssimple payback before any tax benefit, indicative

Accelerated depreciation on solar assets may apply to your company and shortens the payback further; confirm with your tax adviser. Figures are indicative and are confirmed against your own bills in the feasibility study.

Approvals

The paperwork, handled in sequence

Most delays on industrial solar in Gujarat are approvals, not construction. We run them in parallel with engineering so the plant is not waiting on a letter.

Feasibility and load checkContract demand, sanctioned load, roof or land, DISCOM circle
DISCOM applicationCaptive or net-metering application with SLD and protection scheme
Technical feasibilityDISCOM site check and approval of the interconnection
CEIG inspectionElectrical inspector approval of the installation, drawings and earthing
SynchronisationMeter installation, testing and commercial operation

Where export is allowed under current GERC regulations we build in the metering, but we do not base your payback on it.

Standard system

SR-1000, our most-built rooftop package

SR-1000

1 MWp rooftop solar

String inverters, WTS ACDB and PCC, zero-export relay, monitoring. For any plant with about an acre of roof and daytime load above 700 kW.

Modules: ALMM-listed, 25-year performance warranty
Inverters: String, BIS and CEA certified, manufacturer's warranty passed through
Electrical: ACDB and PCC built at Kotambi, IEC 61439 design-verified
Indicative price: ₹3.2–3.8 Cr installed
Build time: Schedule given with the proposal, approvals running in parallel

Ask for an SR-1000 study

Add storage later

Designed to take a battery

Every SR-1000 is built with a spare feeder and EMS interface on the PCC, so storage can be added without rebuilding the switchboard. Many customers add it in year two, once they see the load data.

Spare feeder: Sized for a 500 kW PCS
EMS: Monitoring from day one, storage control added later
Upgrade path: Hybrid EPC

See storage options

Questions we are asked about solar

Can my roof take it?

We do a structural check before anything else. Most pre-engineered sheds take the panel load without strengthening; older RCC roofs sometimes need a ballast or elevated structure. If the roof cannot take it, we say so and look at ground-mount.

What happens on a cloudy day or at night?

You draw from the grid as you do today. Solar reduces your daytime units; it does not back you up. For backup and demand-charge control you add storage, which is why most of our plants end up hybrid.

Do I get a subsidy?

Residential rooftop schemes do not apply to industrial consumers. The benefit that usually does apply is accelerated depreciation on the asset, which your tax adviser can confirm for your company.

Who maintains it?

Either your own electrical team, after our training, or us under an AMC. The AMC includes cleaning, preventive checks, performance reporting against the P50 figure and spares.