A bankable EPC contract transfers construction risk to the contractor behind a fixed price, a fixed date and guaranteed performance. This owner’s guide unpacks the clauses lenders insist on — turnkey vs multi-contract, the performance specification, price and payment, testing and acceptance, delay and performance liquidated damages, warranties and serial defects, security and bonds, risk allocation and force majeure.
Turnkey EPC versus multi-contract
A turnkey (full-wrap) EPC contract gives the owner a single point of responsibility for design, procurement, construction, commissioning and testing — and where the contractor is a consortium, the members should be jointly and severally liable. That certainty costs more, because the contractor prices in contingency, and owner interference in the works can weaken later liquidated-damages and defect claims. A split, multi-contract approach can be cheaper but transfers interface risk back to the owner; it is only justified where the owner has the capability to manage those interfaces.
What lenders require
Lenders look for a defined bankability package: a fixed completion date, a fixed price, performance guarantees, liquidated damages for both delay and underperformance, appropriate security, and tight limits on the contractor’s ability to claim more time or money. The contract should be built around a performance specification that defines what the plant must achieve — not over-prescribe how — and should leave no ambiguity about what constitutes completion.
Price, payment and variations
Best practice is a fixed lump-sum price with milestone payments tied to the transfer of title and to defined, verifiable events rather than a front-loaded schedule, plus a proper mechanism for pricing variations. Retention should be held to first generation revenue so the owner keeps leverage until the plant is genuinely performing.
Schedule, testing and acceptance
The contract should chain commissioning through commercial-operation tests to COD, followed by post-COD performance tests. For utility-scale solar, acceptance turns on Performance Ratio (PR) testing: the minimum PR to certify COD is typically around 95–98% of the guaranteed PR, and the owner may certify COD while withholding the final 5–10% of price where PR sits between the minimum and the guarantee, with a right to reject or terminate if PR falls to around half of the guaranteed value.
Liquidated damages, warranties and serial defects
Delay liquidated damages (DLDs) and performance liquidated damages (PLDs) should be drafted separately. Typical market caps are around 10–15% of contract price for each, a combined LD cap of roughly 20–25%, and an overall liability cap commonly near 100% of contract price, with consequential-loss exclusions and defined carve-outs. Include fail-safe drafting so that if an LD regime is struck down, capped general damages still apply, and be wary of contractor-favoured “exclusive remedies” clauses.
The Defects Liability Period is typically 12–24 months (and can be tiered for critical items), and equipment warranties should be assignable to the lender and from solvent manufacturers. A serial-defect provision is essential: where the same root-cause defect appears in a threshold share of a component population — for example 5% or more of the panels — the contractor must rectify across all units, not only those that have already failed.
Security, risk allocation and force majeure
Security norms include a performance bond of around 10–20% of contract price, retention of about 5–10% (modern practice is a bank guarantee or cash retention, not both), an advance-payment guarantee, and a parent-company guarantee where the contractor is a subsidiary. Ground, weather and environmental risk should be allocated explicitly (extension of time versus cost), extensions of time handled through critical-path notices and conditions precedent, and the prevention principle addressed so that time is never set “at large.” Force majeure is best treated as a neutral risk — each party bears its own costs — with an exhaustive event list and a duty to mitigate.
Keeping the contracts back-to-back
Finally, the EPC contract must interface cleanly with the PPA, the grid-connection agreement and the O&M contract, so obligations and dates line up back-to-back and no gap is left for the owner to absorb. SgurrEnergy reviews EPC contracts independently against exactly these positions, quantifying where a draft departs from bankable market practice.