EPC and EPCM are two common ways to deliver a renewable energy project. Under a turnkey EPC contract a single contractor takes lump-sum responsibility for delivering the plant; under EPCM a managing consultant designs and manages delivery while the owner holds the supply and construction contracts. This guide compares the two models across risk transfer, cost certainty, control, schedule and bankability, and offers guidance on choosing. It is derived from SgurrEnergy's EPCM and advisory experience.
EPC and EPCM at a Glance
The fundamental difference is where the supply and construction contracts sit.
Turnkey EPC
A single contractor designs, procures and builds the plant for a lump-sum price and hands over a working asset, taking most delivery risk.
EPCM
A managing consultant engineers the project and manages procurement and construction, while the owner holds the supply and construction contracts directly.
How They Compare
The models differ across the dimensions owners and lenders care about most.
Risk transfer
EPC transfers most delivery and interface risk to one contractor; under EPCM the owner retains more risk, managed by the EPCM consultant.
Cost certainty vs transparency
EPC offers a fixed price with a risk premium; EPCM offers open-book transparency but less up-front certainty.
Control and flexibility
EPC limits owner involvement once signed; EPCM keeps the owner in control of design and procurement decisions.
Schedule
EPC schedule sits with the contractor; EPCM can start packages earlier but needs active owner-side management.
Bankability
A strong EPC wrap is familiar to lenders; EPCM can be financed but typically needs robust owner's engineering and controls to satisfy lenders.
Questions to Guide the Choice
The right model follows from the owner's priorities and capabilities.
- How much risk do you want to transfer?
- How important is price certainty?
- How much control do you want?
- What is your team's capacity?
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Put This Into Practice on Your Project
This resource is a starting point, not a substitute for project-specific technical advice. SgurrEnergy provides independent advisory, due diligence and engineering support across the full renewable energy project lifecycle. Discuss how it applies to your wind, solar PV, BESS, hydro or hybrid project with our technical team.