What does a client check before awarding a solar EPC contract?
They check the capacity you have actually delivered and commissioned, the performance guarantee you will stand behind, and your financial capacity to carry the contract. EPC selection is a counterparty decision more than a technical one.
A client is awarding a contract where the contractor's failure mid-project would be worse than a slightly higher price.
Reviewed 4 August 2026
Scope and specifications
- Capacity delivered and commissioned
- The primary evidence of capability.
- Project types handled
- Rooftop, ground mount, floating and hybrid differ substantially.
- Scope offered
- Full EPC, balance of plant or installation only.
- Performance guarantee offered
- The commercial substance of the contract.
- In-house versus subcontracted work
- Determines control and risk.
- Operations and maintenance capability
- Whether the relationship continues after handover.
- Geographic coverage
- Where you can actually mobilise.
Documents buyers may need
| Document | What it proves | Where it belongs |
|---|---|---|
| Commissioned project listAsked at: qualification — the primary evidence | Capacity, location, year and configuration of completed projects | Publish it |
| Performance ratio guarantee termsAsked at: contract negotiation | Guaranteed plant performance and the remedy if not achieved | Publish it |
| Commissioning test reportsAsked at: handover | Measured plant performance at handover | Per shipment |
| Safety record and certificationAsked at: prequalification | Health and safety management and record | Publish it |
| Financial statements or bonding capacityAsked at: prequalification | That the contractor can carry the contract | Name it, share on request |
| Design documentation and yield assessmentAsked at: technical review | The basis of the projected generation | Name it, share on request |
| Warranty and defects liability termsAsked at: contract | What is covered after handover and for how long | Publish it |
Details for a useful enquiry
- Project location and capacity
- The basis of any proposal.
- Site type and land or roof details
- Determines the design approach.
- Scope required
- EPC, supply only or with operations and maintenance.
- Grid connection status
- Frequently the critical path item.
- Financing arrangement
- Lender requirements change the contract.
- Target commissioning date
- Drives the whole programme.
Questions suppliers ask
What evidence most reduces a client's risk?
A specific project list with capacity, location, year and configuration, and permission to speak to those clients. EPC selection is a judgement about whether you will finish, and comparable completed projects address that far better than any capability statement.
Should performance guarantees be discussed publicly?
Explaining what you guarantee and how it is measured is a strong position, because many contractors avoid the subject. Clients are trying to understand whether generation shortfall is their problem or yours, and a clear answer is a commercial advantage.
How should operations and maintenance be presented?
As a distinct offer with defined scope, response times and reporting. Clients increasingly prefer continuity between construction and operation, and a contractor who can carry both reduces the interface risk that causes disputes over underperformance.
Check which documents and standards your buyer needs; requirements vary by market, customer and contract.
Plact Research. Plact's editorial desk for buyer-evidence research. Industry standards, documents and buyer questions are researched and drafted with Plact's AI tools, then reviewed by Praveen Kavuri before publication. Every claim cites the standard, regulation or public source it rests on.
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