Turnkey EPC delivery is a project delivery model where a single contractor provides a complete Engineering, Procurement, and Construction (EPC) scope and hands over a fully operational EV charging site “ready to use.” In EV charging infrastructure, turnkey EPC means the customer (site owner, fleet operator, CPO, or developer) receives a commissioned charging installation with defined performance, documentation, and compliance—without coordinating multiple separate contractors.
What Is Turnkey EPC Delivery?
In a turnkey EPC model, one provider takes responsibility for the end-to-end delivery, typically including:
– Engineering: site survey, design, electrical calculations, civil layout, permits support, grid connection design
– Procurement: sourcing chargers, switchgear, cables, foundations, communications, signage, protection devices
– Construction: civil works, trenching, foundations, кабling, electrical installation, commissioning, testing
– Handover: as-built documentation, user training, warranties, compliance certificates, O&M plan
“Turnkey” implies the output is operational at handover, with clear acceptance criteria.
Why Turnkey EPC Matters for EV Charging Projects
Charging deployments combine multiple disciplines and stakeholders. Turnkey EPC simplifies delivery by concentrating responsibility and reducing coordination risk.
Key benefits for customers include:
– Single point of accountability for cost, schedule, and quality
– Faster execution through integrated design-to-build workflows
– Lower interface risk (civil vs electrical vs software integration)
– Clearer compliance responsibility (permits, inspections, safety documentation)
– Easier scaling across multiple sites using a repeatable template
For fleets, turnkey EPC also supports predictable commissioning timelines tied to vehicle delivery schedules.
Typical Scope in EV Charging Turnkey EPC
A charging EPC scope commonly covers:
– Site feasibility and capacity checks (grid capacity assessment)
– Connection application coordination and PCC design
– LV/MV distribution design (panels, protection, metering)
– Civil works (ducting, pull pits, foundations, resurfacing, drainage)
– Installation of AC/DC chargers and ancillary equipment
– Load management configuration and site power limits
– Communications setup (Ethernet/LTE), backend connectivity, OCPP setup
– Testing: insulation, RCD checks, functional tests, commissioning
– Safety deliverables: RAMS, signage, barriers/bollards, lighting checks
– Documentation: as-builts, test certificates, asset register
Depending on the contract, EPC may also include software onboarding, payment terminal setup, and initial operations setup.
Turnkey EPC vs Multi-Contractor Delivery
Turnkey EPC:
– One contract and one delivery owner
– Integrated schedule and design responsibility
– Fewer handover points between trades
– Often higher upfront price but lower project risk
Multi-contractor delivery:
– Separate engineering, installation, civil, and software providers
– More customer coordination required
– Potentially lower costs but higher interface risk and delays
Commercial and Contract Considerations
Key items typically defined in a turnkey EPC contract:
– Technical specification and bill of materials (charger models, power levels, metering)
– Acceptance criteria (commissioning tests, uptime targets at handover)
– Timeline, milestones, and penalties/bonuses (if applicable)
– Warranty split (hardware vs workmanship vs software)
– Change order rules (scope changes due to ground conditions or grid requirements)
– Compliance responsibilities (permits, inspections, safety, accessibility)
– Service level options post-handover (O&M contract, response times)
Risks and How to Manage Them
– Grid uncertainty: connection approvals and transformer lead times can dominate schedules
– Scope gaps: clarify who provides backend onboarding, payment setup, and roaming
– Ground conditions: civil works risks (unknown utilities, resurfacing) need contingencies
– Interoperability: ensure OCPP compliance and data ownership terms
– Lifecycle cost: turnkey should not optimize only CAPEX—consider TCO and serviceability
Related Glossary Terms
EPC contracting
Installation scheduling
Grid connection application
Grid capacity assessment
Point of Common Coupling (PCC)
Load management
Commissioning
O&M (Operations & Maintenance)
Total cost of ownership (TCO)