eHGV Charging

eHGV Charging Infrastructure Design

Specialist electrical design for eHGV charging infrastructure, supporting depot, logistics and en-route charging projects from feasibility and grid capacity assessment through to detailed design and construction support.

A specialist discipline

eHGV charging requires a different electrical design approach

Electrifying heavy goods vehicle fleets is not simply a matter of scaling up standard EV charging infrastructure. Higher charging loads, depot operating patterns, grid capacity, cable routes, protection requirements and equipment selection all need to be considered together from the earliest design stages.

eHGV charging projects often involve high power DC charging equipment, grouped cable routes, feeder pillars, equipment compounds and larger electrical distribution systems. These installations require careful assessment of electrical capacity, protective measures, cable thermal performance and DNO or iDNO connection requirements.

EV Design provides specialist electrical design for eHGV charging infrastructure, supporting clients from feasibility and grid capacity assessment through to detailed design, tender information and construction stage technical support.

150 kW to 1 MW+

High power charging

Protection design

RCDs and fault studies

DNO/iDNO

Connection support

Key design considerations

The engineering depth eHGV projects demand

High-Power DC Charging Infrastructure

High-power eHGV charging installations often comprise multiple DC chargers operating simultaneously, creating significant electrical demand. Careful assessment of electrical capacity, diversity, cable sizing, protection coordination and equipment selection is essential to deliver a safe, reliable and buildable installation.

Earthing & Protective Measures

High-power charging installations require careful consideration of earthing arrangements and protective measures. The appropriate solution will depend on the characteristics of the incoming electrical supply, charging equipment and site-specific requirements, with TT systems designed where required.

Protection Design & DC Fault Current Considerations

DC charging equipment introduces additional protection considerations beyond conventional electrical installations. Correct selection of protective devices, residual current protection and assessment of DC fault current effects are essential to achieve compliance with BS 7671, the EV Charging Code of Practice and manufacturer requirements.

Grid Connections & HV/LV Interfaces

Larger eHGV charging developments frequently require substantial electrical supplies, which may involve new HV connections, private substations or upgrades to existing network infrastructure. Early assessment of grid capacity and coordination with DNOs, iDNOs and ICPs is often critical to project delivery.

Electrical Infrastructure Layout

eHGV charging infrastructure requires careful integration of feeder pillars, switchgear, equipment compounds, cable routes and charging equipment within the wider site layout. Good infrastructure planning supports safe access, future maintenance and efficient project delivery.

Grid Capacity & Connection Applications

Securing adequate electrical capacity is often one of the longest lead items on an eHGV charging project. EV Design supports clients with grid capacity assessments, DNO and iDNO application submissions, and the technical information required to progress new or upgraded electrical connections.

What we deliver

Complete eHGV Charging Design Package

Our eHGV charging design service supports projects from initial feasibility and grid capacity assessment through to detailed electrical design, tender documentation and construction stage technical support. Every project is developed in accordance with BS 7671, the IET Code of Practice for Electric Vehicle Charging Equipment Installation, applicable DNO requirements and manufacturer guidance.