EV Charging Infrastructure
End-to-end electrical design for EV and eHGV charging — from DNO capacity and load assessment through to charger selection, protection and construction support, including high-power and megawatt charging.
Get in touchCharging infrastructure designed from the supply inwards
JBSE Consulting Engineers provides the electrical engineering behind EV and eHGV charging projects — workplace and commercial car parks, fleet and logistics depots, residential developments and high-power charging hubs. The work starts where the project's real constraint usually sits: the available supply capacity, the assessed load and what the network can actually deliver.
From there the design develops through distribution strategy, charger selection and protection, cable sizing, containment and earthing, into tender documentation and construction-stage support. Charging installations run at sustained high load in ways general building services do not, so grouped cable routes, buried ducts, voltage drop and continuous rating are engineered rather than assumed.
Charging infrastructure also carries safety considerations that sit outside routine electrical design — PEN-fault protection for equipment outside the equipotential zone, and residual current protection selected with smooth DC fault currents in mind. Those are addressed as standard, and the deep electrical background behind the practice is exactly what this discipline draws on.
Complete EV charging infrastructure capabilities
Every element of the charging package, from grid capacity and load assessment through to safety provisions and construction support — grouped by the part of the project each belongs to.
Charging design
EV & eHGV charging infrastructure design
AC and DC charging schemes for workplace, commercial, residential, fleet and depot sites, from site layout through to detailed electrical design.
High-power & megawatt charging systems
High-power DC and megawatt charging infrastructure for heavy vehicle and en-route charging, including compound layouts and future capacity allowance.
Power & capacity
DNO applications & electrical capacity assessments
Assessment of existing capacity, maximum demand and headroom, with the technical information needed to support DNO and iDNO connection applications.
Load assessments & power distribution design
Charging load profiles, diversity and load management assessed, then translated into an LV distribution design that suits the site and its growth.
Electrical safety & delivery
Charger selection & electrical protection
Technical review of charging equipment against the site requirements, with protective device selection, discrimination and fault-level coordination.
Cable sizing, containment & earthing design
Cable sizing for continuous load, duct and containment routes, mechanical protection, and earthing arrangements suited to the installation.
O-PEN, RCD & electrical safety assessments
PEN-fault protective measures, RCD selection accounting for smooth DC residual currents, and touch voltage considerations for equipment outside the equipotential zone.
Tender documentation, due diligence & construction support
Drawings, schedules and specifications for tender, technical due diligence on proposed schemes, and technical support through installation and commissioning.
Designed to the standards charging installations are certified against
Charging infrastructure is designed to BS 7671, including the EV-specific provisions of Section 722, alongside the IET Code of Practice for Electric Vehicle Charging Equipment Installation. Distribution network operator requirements, charging equipment manufacturer guidance and the relevant BS EN standards are coordinated into the same design. PEN-fault protection and residual current protection are assessed as standard rather than left to the installing contractor, and the electrical design is developed in step with the wider site services and civils.
BS 7671 Section 722
EV charging installation requirements
IET Code of Practice
EV charging equipment installation
DNO Requirements
Connection & capacity coordination
BS EN Standards
Equipment & installation standards
Need EV charging design input on a project?
Tell us the site, the available capacity and the charging you are planning — you will get a clear scope and a practical way forward.