How to evaluate an EPC contractor

Choosing an EPC contractor is one of the most consequential decisions in a renewable project. The contractor will design and build an asset expected to operate for decades. A good contractor delivers on time, to quality, with a cooperative approach to problems. A poor one can cause delays, defects and disputes that affect the project for years. Price is important, but it is only one part of the evaluation.

Evaluation criteria

1. Track record

• Projects completed of similar type, size and technology
• Projects in similar terrain and climate
• Projects in the same state, with knowledge of local utilities and approvals
• Performance of completed plants

How to verify: visit completed sites, speak with past clients, and check how plants have performed since handover.

2. Proposed team

The company's track record means little if the team on your project is inexperienced. Ask for:

• CVs of the project manager, site manager, design lead and quality manager
• Their involvement in previous similar projects
• Commitment that key people will stay on the project

3. Engineering capability

• In-house design capability or reliance on subcontractors
• Design standards and tools used
• Approach to site-specific design — terrain, drainage, soil
• Quality of sample design documents

4. Procurement and supply chain

• Relationships with equipment suppliers
• Approach to sourcing, inspection and logistics
• Compliance with procurement requirements applicable to the project
• Track record of on-time delivery

5. Construction management

• Planning and scheduling approach
• Subcontractor management
• Site organisation and logistics
• Ability to scale workforce

6. Quality management

• Quality management system
• Inspection and test plans
• Approach to non-conformances
• Sample quality records

7. Health, safety and environment

• Safety record and statistics
• Safety management system
• Training programmes
• Environmental management on site

Safety record says a great deal about how a contractor operates.

8. Financial strength

• Financial statements
• Order book relative to capacity
• Ability to provide bank guarantees
• Exposure to other troubled projects

A contractor in financial difficulty can stall your project.

9. Contract terms

• Acceptance of key terms — liquidated damages, performance guarantees, warranties
• Exceptions and deviations proposed
• Payment terms requested
• Security offered

See how EPC partnerships work.

10. Approach and culture

• Responsiveness during the bid process
• Willingness to engage on problems
• Transparency about risks
• References describing behaviour when things went wrong

A scoring approach

Weights depend on the project. Safety and financial strength often work best as pass/fail thresholds rather than scored items.

Comparing bids fairly

Bids are rarely directly comparable. Normalise them:

1. Check that scope is identical — identify exclusions and assumptions
2. Price any missing scope
3. Adjust for different equipment proposals
4. Account for exceptions to contract terms
5. Compare schedules
6. Compare performance guarantees

A bid that appears cheapest may be the most expensive once exclusions are priced.

Red flags

• Price far below others without explanation
• Vague scope or many exclusions
• Reluctance to name the proposed team
• Unwillingness to provide references or site visits
• Major exceptions to standard terms
• Poor safety record
• Financial stress

The evaluation process

1. Pre-qualification — screen contractors on basic criteria
2. Request for proposal — clear scope, specifications and contract
3. Bid clarification — meetings to resolve questions
4. Technical and commercial evaluation
5. Reference checks and site visits
6. Negotiation with preferred bidders
7. Award

Questions for reference clients

• Was the project delivered on time, and if not, why?
• How did the contractor handle unexpected problems?
• Were the people named in the bid actually on site?
• How were change orders handled?
• How has the plant performed since handover?
• Would you use them again?

Common mistakes

• Choosing purely on price
• Not normalising bids for scope differences
• Ignoring the proposed team
• Skipping reference checks
• Accepting contract exceptions without assessing their effect

After the award

Evaluation doesn't end at award. Hold a kick-off meeting to confirm scope, team, schedule and communication routes, and check in the first weeks that the people named in the bid are actually on site. Early signs — late document submissions, staff substitutions, unclear subcontracting — are worth raising straight away, while the relationship is new and expectations are easiest to reset.

How we help

Through EPC partner coordination and project advisory, we help owners prepare tender documents, normalise bids, check references and evaluate independent EPC contractors on the owner's side.