Industrial Solar EPC

Industrial rooftop solar, engineered like the rest of your plant

Captive rooftop solar for HT-connected plants — designed around your process loads, DG sets, power factor and protection scheme, not around a brochure. We are the electrical contractor for entire factories; our solar EPC work is built to the same standard.

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15+ years · 535+ projects · HT electrical, fire & solar under one contract · ISO 9001:2015

Why industrial is different

A panel installer sees your roof. We see your single-line diagram.

Industrial solar fails differently from commercial solar. The modules rarely disappoint — the integration does: inverters tripping on DG changeover, power factor incentives lost after commissioning, strings clipped by a harmonics-rich LT network, sanctioned-load mismatches stalling the DISCOM application. We publish an entire guide on why industrial solar underperforms because we keep being called to fix plants built by installers who had never engineered a factory's electrical system.

Our solar team is the same engineering organisation that builds HT/LT infrastructure, DG synchronisation and fire systems for industrial plants across 18+ states. Solar plugs into that discipline.

Engineered in scope

What the EPC actually covers

Load-profile & bill analysis — sizing against daytime base load, not roof area
Structural verification for older industrial sheds
Grid-interconnection protection — reverse power, islanding, relay coordination
Solar–DG–grid switching logic so backup power and solar never fight
Power-quality & harmonics audit on VFD-heavy networks
DISCOM net-metering / captive registration and CEIG approval — in-house
ALMM Tier-1 modules, bankability-checked
Commissioning with performance-ratio verification, optional O&M with monitoring

Beyond the roof

When rooftop alone isn't the answer

Open access solar

When demand outgrows the roof, off-site solar over open access can beat rooftop economics in some states. The honest comparison.

Battery energy storage (BESS)

Peak shaving and demand-charge management with BESS — when the arithmetic works, and when it doesn't yet.

DG vs grid vs solar

Per-unit cost of every source your plant runs on — the numbers that justify the project internally.

Sizing questions? Start with solar for factories or jump straight to 250 kW / 500 kW / 1 MW cost breakdowns.

Delivered work

Where we have carried solar on a live plant

We deliver solar as part of an integrated plant scope rather than as a standalone rooftop install — the same team that sizes the transformer and the DG set ties the array into the LT panel. That is a narrower record than a pure solar installer's, and it is the whole record: one project below.

Pharmaceutical

Turnkey MEP & Solar for Consern Pharma

Turnkey multi-trade pharmaceutical project · Consern Pharma

Scope: Electrical · Solar · HVAC · Fire Fighting · Low Voltage

Capacities and commissioning records are not published on these pages yet. Ask for them with the feasibility request below and we will send what the project file holds.

Straight answers

Industrial solar questions, answered by engineers

How is industrial solar different from commercial rooftop solar?

Scale and integration. An industrial plant is usually HT-connected with a dedicated transformer, runs large motor loads with VFDs, and often has DG backup that must never back-feed the solar plant. Industrial solar is an electrical-integration project first and a panel installation second — protection coordination, synchronisation logic and power quality decide whether the plant performs, not module wattage.

Can solar run alongside our DG sets?

Yes, but only with deliberate engineering. Solar inverters must derate or trip when the plant islands onto DG power, or the DG can be damaged and the inverters will hunt. We design the changeover logic, reverse-power protection and minimum-DG-loading controls as part of the EPC scope — the same discipline covered in our factory microgrid guide.

Does solar affect our power factor or harmonics?

It can. Solar inverters displace active power drawn from the grid, which changes the reactive share your APFC panel sees, and inverter switching adds harmonic content that matters on plants already running many VFDs. We measure PF and harmonics as part of design so your electricity bill's PF incentive doesn't quietly disappear after commissioning.

What approvals does an industrial solar plant need?

Net-metering or captive registration with your DISCOM, CEIG (Chief Electrical Inspector) approval for the installation, and synchronisation permission. We prepare and file all three ourselves and follow them up — the same CEIG and DISCOM filings we make for complete factories as an MEPF contractor, not a subcontracted liaison job. The DISCOM and the inspectorate decide.

Rooftop captive or open access — which suits an industrial consumer?

Rooftop captive suits most plants up to a few MW of demand: no wheeling charges, generation consumed where it's produced. Open access starts making sense for very large consumers in states with favourable banking and cross-subsidy rules. We model both on your actual bills before recommending either — the comparison is in our open-access vs rooftop guide.

Free · 30 seconds

What would solar actually save you?

Three inputs. Your numbers appear before we ask for anything.

1 Your site
2 Your numbers
3 Full report

Monthly electricity bill ₹3,00,000 Average across the year, not your highest month.

Roof type

RCC flat roof Metal sheet roof Industrial shed / north-light

Sanctioned load 500 kW Most DISCOMs cap rooftop solar against this. We check the exact rule for your state.

CAPEX, bank loan or OPEX

Three ways to pay for it — and the one that suits you is a finance question, not a solar one

The engineering is identical in all three. What changes is who puts up the capital, who owns the asset, who carries the O&M, and who keeps the savings.

CAPEX

You own the plant

You fund it, you own the asset, and every rupee it saves stays with you.

Depreciation: Accelerated depreciation at 40% WDV in year one. On a typical corporate tax rate that is roughly 10–12% of project cost back as a year-one tax saving — confirm your own position with your CA.
Savings: You keep 100% of the generation. Nothing is shared with a developer.
Payback: Typically 3–6 years for C&I rooftop at a healthy tariff. Yours depends on your blended tariff, region and roof — the calculator gives your number, not an average.
Asset: A 25-year asset on your balance sheet, with the loan (if any) usually clear inside 5–7.

Trade-off: You fund the capital and carry the O&M.

Compare on lifetime rupees

BANK-FINANCED OWNERSHIP

You own it, a bank funds most of it

A lender funds the bulk of the plant against a contribution from you. You still own the asset at the end.

Your contribution: Not zero — this is the number most often misstated. The published captive schemes we checked want 20–25% of project cost: SBI Surya Shakti sets 20% minimum for captive projects and states deviation is not permitted; Indian Bank IND-SURYA SHAKTI asks 25% on equipment and erection. Read 27 Sep 2026 — re-check before you budget on it.
Security: Expect the financed assets hypothecated, plus a lien or mortgage over the land and building the plant stands on. Personal guarantees from directors are common.
Tenure: Commonly 10–15 years door-to-door including any moratorium, which is what lets the EMI sit below the monthly saving on a healthy tariff. Whether it actually does is arithmetic, not a promise — the EMI calculator uses your numbers.
Who decides: The lender, not us. SEPL prepares the technical pack it asks for — system design, BOQ, generation estimate and commissioning evidence. We do not assess your credit, submit applications on your behalf, or promise a sanction.

Trade-off: You take on a repayment obligation and the O&M, and the lender takes security over the building.

Test it against your own EMI

OPEX / RESCO / PPA

You buy the output

An investor or developer builds and owns the plant on your roof, and you buy the units it makes. This is how the model works in the market — whether a given project qualifies is a question for assessment, not a standing SEPL offer.

Capital: No upfront plant CAPEX from you, and the plant stays off your balance sheet. That is not the same as free — you take on a PPA with a tariff, a term, and usually a minimum-consumption or deemed-generation obligation.
Tariff: A per-unit rate agreed in the contract, normally below your current DISCOM tariff. Check the escalation clause — it decides the deal.
Risk: Performance and O&M sit with the developer for the contract term.
End of term: Read the transfer clause carefully. Some contracts hand you the asset; others do not.

Trade-off: Smaller saving, usually more total cost than owning across 25 years, and you give a third party rights over your roof for the term.

Model a PPA offer you've been sent

Solar PPA, RESCO or bank loan — which suits your factory?

Request a project-specific review of bank-financed ownership and investor-funded alternatives. Availability, borrower contribution and terms depend on project assessment and the lender or investor.

Request a solar finance assessment

Published borrower contribution on the captive solar schemes we checked (2026-09-27): State Bank of India Surya Shakti Solar Finance — 20% minimum for captive projects, with deviation not permitted; 25% minimum for other-than-captive; Indian Bank IND-SURYA SHAKTI — 25% on the cost of the equipment and erection charges. SEPL is an EPC contractor, not a lender — we are not presented here as a partner of any bank, and the loan decision is the lender's.

Want to see what a real proposal looks like before you talk to anyone?

We'll send a worked 500 kWp commercial example — layout, BOQ structure, generation model and the full CAPEX-versus-PPA comparison. A sample, not a quote for your site.

Request sample 500 kWp ROI proposal

Figures above are indicative and depend on your tariff, region, roof and tax position. Tax treatment changes — confirm depreciation and input-credit specifics with your CA before you commit. We put the assumptions on screen rather than in a footnote.

Statutory approvals

DISCOM Net-Metering & CEIG Applications Prepared and Filed In-House.

Approvals are our core trade as an MEPF contractor — not something we sub out to a consultant and hope for. You sign, we file, we follow up.

1

Feasibility & application

Load study, single-line diagram and the net-metering application prepared and filed.
2

CEIG / Electrical Inspector

Drawings, test reports and the inspection itself — coordinated and attended by our team.
3

Synchronisation & meter

Bi-directional meter, DISCOM sign-off and grid synchronisation, through to commissioning.

Request a feasibility & shading assessment Ask about approvals

Put an engineer on your plant's numbers

Share a recent HT bill and your sanctioned load — we'll tell you what captive solar can realistically offset, and what it can't.

Request a Solar Feasibility Study → WhatsApp Us +91 70099 85817