Solar for a Multi-Site Industrial Group: Standardising EPC Across States

For a multi-site industrial group, standardise the specification, the commercial template and the monitoring format, and keep sizing, approvals and grid connection site-specific. One EPC across all states works when the group wants one design authority and one warranty chain. It works badly when each state's approval process is left to a contractor with no local presence.

Should a group use one EPC or a different contractor in each state?

Neither extreme is usually right. The choice turns on how much the group values consistency against how much it values local pricing and speed.

• One EPC for the whole programme. Gives one specification, one warranty chain, one O&M model and one data feed. The cost is dependence on a single contractor, and the contractor's reach into each state's DISCOM offices has to be real, not assumed.
• A different EPC per state. Gives local knowledge and competitive tension, but you pay in inconsistent specifications, mixed inverter and monitoring platforms and several warranty regimes that the group must manage.
• A framework with a few approved EPCs. The group fixes the specification, the commercial template and the data format, then awards each site by competition among the approved list. This structure is often used for larger programmes.

Whichever you choose, run a pilot site first. The pilot proves the specification, the commercial template and the monitoring feed before the group commits across states.

What should be the same at every site, and what must differ?

How do approval rules actually differ by state?

This is where a group's standard template breaks. The Central Electricity Authority's Safety Regulations, 2023 leave two numbers to each state: the "notified voltage" up to which an owner self-certifies an installation (Regulation 45) and the generating-unit capacity above which the Electrical Inspector must inspect before commissioning (Regulation 34). The same plant can be self-certified in one state and inspected in another. Our guides to CEIG approval and the CEIG approval consultancy set out what the file contains.

Net metering is central in principle and state-specific in practice. The Ministry of Power's amendment raised the net-metering limit to 500 kW, but each state commission writes the regulation, so banking, billing and eligibility differ. Open access has a national floor: the Green Energy Open Access Rules, 2022 lowered the threshold to 100 kW and set a 15-day approval timeline, with the state commissions deciding the charges. Where a group wants captive status through a group structure, the test in Rule 3 of the Electricity Rules, 2005 is that the users own at least 26% of the plant and consume at least 51% of the electricity it generates annually, with each user consuming in proportion to its share for a plant owned by an association of persons. Our note on captive solar versus open access explains those routes.

For each new state, write down four things before pricing: the state's net-metering regulation, its open-access charges, the Inspector's thresholds and the DISCOM's feasibility process. That one-page profile is more useful to a group than a long national summary.

How should the rollout be phased?

1. Pilot. One site with a representative roof and a cooperative DISCOM. Prove the specification, the approval file and the monitoring feed, and record what the DISCOM and Inspector actually asked for.
2. Template. Convert the pilot into a design package, a commercial template and an approval checklist that the group owns, not the contractor.
3. Waves by state. Group the next sites by state, so one approval learning curve serves several plants. Sequence them by payback and by the ALMM date for your commissioning window.
4. Review after each wave. Compare actual generation, approval time and cost against the plan, and adjust the template.

Use the solar calculator on each site's bill to rank sites by payback before you decide the order.

How do you consolidate monitoring across sites?

Monitoring is the one area where the group can insist on identical standards and should. Ask for open data access, so the group owns the data and can change platforms. Fix the KPIs: energy generated, performance ratio, availability, inverter alarms and cleaning dates. Require every site to report in the same format to one dashboard. Define alarm response times in the O&M contract, so a fault in one state is handled to the same standard as another. The same logic applies to maintenance; see how multi-site AMC contracts are structured for MEP and apply it to solar.

How should the contract and the money be structured across sites?

A group programme needs a contract shape that survives different sites. The usual form is a framework agreement that fixes the specification, the payment milestones, the warranty and O&M scope, and the way delay and performance damages are set, followed by a site order for each plant that states its capacity, price, schedule and approval responsibilities. The framework keeps the group's terms constant; the site order keeps the price honest, because a roof in a coastal wind zone and a flat RCC roof do not cost the same per kW.

Three points deserve attention before signing the framework.

• Price reference. Agree how price per kW is built, by scope line, so a site order can be checked against the same structure. Our published C&I band is ₹24,000–32,000 per kW excluding GST; where a site sits in or outside that band should be explained by its scope and conditions.
• Funding choice by site. A group may own some plants and buy power from a developer at others, since tariffs, tax positions and balance-sheet priorities differ between units. Run the same comparison at each site; do not apply one answer group-wide.
• Policy dates. MNRE's ALMM List-II exemption for net-metering and open-access projects runs to 31 December 2026 for commissioning, so the framework should say who carries the cost if a site slips past it.

How Secured Engineers helps

Secured Engineers designs solar in-house and files DISCOM net-metering, CEIG and Fire NOC applications in-house, so a group gets one design authority and one approval team. Solar can sit under one contract with MEPF works at the same site. We work from offices in Noida (Delhi NCR) and Ludhiana, and have delivered 535+ projects across 18+ states with 89.77% repeat clients; for states where we have not yet delivered, we mobilise from Noida and Ludhiana, and a pilot-first approach applies there too.

If you are planning a programme, share the list of sites with sanctioned load, roof type and a year of bills and we will propose a pilot, a template and a rollout order. See our industrial solar EPC service, then contact us on WhatsApp, call +91 70099 85817 or request a free proposal.