Solar EPC for Indian Businesses: Six Checks Before You Sign

A solar proposal should explain the electricity bill it will change

For an Indian factory, warehouse or commercial campus, a solar EPC proposal is an operating decision as well as an equipment purchase. Engineering, procurement and construction determine what gets installed. The business case depends on how much useful electricity the system delivers, which costs it displaces, and who resolves problems after handover.

A productive procurement process starts with a shared evidence pack. Give every bidder the same electricity bills, operating calendar, available interval consumption data, roof or land information, and expected changes in production. Ask each bidder to return its assumptions in an editable format.

The following framework is ClimateCred's recommended approach to comparing proposals. It is a procurement checklist, not a quoted project return or a statement of a particular state's electricity rules.

1. Match the proposed system to the site's working hours

Annual consumption is a useful starting point, but two facilities with the same annual electricity use can need different solar designs. A weekday warehouse and a continuously operating plant have different patterns of demand.

Ask bidders to show how their generation estimate overlaps with consumption during working days, weekends and shutdowns. Separate electricity used on site from any expected surplus. Treat expansion plans as a separate scenario until the additional load is supported by an approved operating plan.

The decision question is simple: how much of the proposed generation can this site use under realistic operating conditions?

Before assigning value to exported electricity, require confirmation of the applicable connection arrangement, permissions and settlement terms. Do not assume every unit generated earns the same value.

2. Make generation assumptions visible

A forecast becomes easier to evaluate when its inputs are available. Request the weather dataset, array layout, module and inverter specifications, shading assessment, expected losses and a monthly generation profile.

The PVWatts modelling documentation illustrates why these inputs matter: its production model includes location, system capacity, array type, tilt, orientation, system losses and inverter-related parameters. It can return both monthly and hourly results.

For procurement, use modelling as evidence to interrogate rather than as a delivery promise. Ask bidders to explain differences between their forecasts using the same site conditions. Keep the model version and input file alongside the proposal so later revisions can be traced.

A useful clarification meeting should answer three questions:

• Which inputs came from a site survey?
• Which inputs are assumptions awaiting confirmation?
• Which assumptions have the largest effect on the forecast?

3. Compare the complete delivery scope

A price comparison is only meaningful when the scope matches. Create a common comparison sheet and ask each bidder to mark every item as included, excluded or provisional.

Work package	Evidence to request	Decision it supports
Site readiness	Survey findings and any roof or civil works required	Whether enabling work is funded
Electrical integration	Connection design and responsibility boundaries	Who delivers the complete installation
Monitoring	Metering plan, data access and reporting scope	Whether performance can be checked
Handover	Test records, drawings and equipment documentation	Whether the owner can accept the asset
Maintenance	Service scope, response arrangements and exclusions	Who supports operation after commissioning

This approach is consistent with the US Department of Energy's solar procurement guidance, which connects technical specifications with procurement, design and commissioning, and recommends planning maintenance during design. Its federal procurement arrangements are US-specific; Indian buyers should use the underlying technical questions with their own project requirements.

4. Build a bridge from generation to bill savings

Ask the finance team to reconcile the proposal with actual electricity invoices. Identify which bill components are expected to change, which remain, and what evidence supports that treatment. Any demand-charge reduction should be evaluated against the site's measured demand pattern and applicable tariff, rather than assumed from installed capacity.

Keep separate rows for self-consumed generation, any permitted export receipts, recurring operating costs and equipment replacement assumptions. Then review financing, tax and depreciation with the company's advisers before approving an investment case.

For internal review, request three clearly labelled scenarios:

1. Base case: the agreed operating plan and documented assumptions.
2. Lower-use case: reduced daytime consumption or a longer shutdown.
3. Delivery-risk case: delayed commissioning or lower production.

These are proposed management scenarios, not forecasts. Their purpose is to reveal which assumptions the investment decision depends on.

5. Put operational accountability into the evaluation

Before selecting a supplier, request an operating responsibility matrix: who monitors alarms, authorizes maintenance, arranges access, manages warranty claims and communicates outages?

The Department of Energy's operating and maintenance guidance distinguishes preventive work from corrective repairs and identifies performance and financial risks when systems fail. The practical implication for a buyer is to budget for support throughout operation.

Ask the proposed service provider to explain its reporting process using a sample monthly report. The report should help the owner distinguish missing data from an actual production shortfall and identify the person responsible for investigation.

Avoid leaving monitoring access dependent on one departing employee or a supplier's informal spreadsheet.

6. Agree on the evidence for renewable-electricity claims

If sustainability reporting is part of the business case, bring the reporting team into procurement early. Establish how generation records, meter data and contractual rights to environmental attributes will be documented. Check any proposed sale or transfer of those attributes before making claims about the electricity.

The GHG Protocol Scope 2 Guidance addresses purchased electricity and the use of contractual instruments, including quality criteria for market-based accounting. The appropriate treatment of a particular solar arrangement depends on its ownership, contracts and reporting boundary.

Maintain a clear connection between the project documents and the evidence used in reporting. Do not insert unsupported carbon-credit or certificate revenue into the base business case.

What to send before requesting a solar EPC proposal

Prepare a single folder containing recent electricity bills, available consumption data, site drawings, operating hours, planned shutdowns and the proposed installation area. Add a short note identifying the commercial decision owner and the required commissioning window.

ClimateCred's solar EPC offering sits alongside its energy and reporting services. To discuss a site-specific scope, request a consultation and share the evidence available for your facility.

A well-prepared brief gives the next conversation a concrete purpose: agreeing on a system scope, operating assumptions and verification plan that the business can evaluate together.