EV Charging Terminology

ENA Connect Direct AC EV is an ENA process or listing route for AC EV charge points, supporting connection notification or application workflows for UK distribution networks.

ENA Connect Direct V2G relates to ENA connection data for vehicle-to-grid capable equipment.

ENA Connect Direct V2G Stack refers to the broader approved or declared combination of V2G charger, inverter or control system and associated equipment used for connection assessment.

ENA EREC G100 is the UK Engineering Recommendation for customer export and import limitation schemes used to control power flow at a grid connection point. In EV charging it is relevant to load management, constrained connections, V2G export control and maximum import limitation.

ENA EREC G94 is a UK Engineering Recommendation addressing the risks and arrangements associated with multiple electricity connections in close proximity. In EV charging it may be relevant to complex sites, adjacent supplies, multi-occupancy buildings or installations where separate connections interact.

ENA EREC G98 is the UK Engineering Recommendation for connecting fully type-tested small-scale generation equipment up to 16 A per phase in parallel with public distribution networks. In EV charging, it can become relevant where equipment includes export-capable generation or storage-related functions.

ENA EREC G99 is the UK Engineering Recommendation for connecting generation equipment and larger power generating facilities in parallel with public distribution networks. It is relevant to export-capable EV charging, V2G, storage and larger schemes that do not fall under G98.

Load curtailment reduces or temporarily limits charging demand to keep a site within an agreed electrical capacity or operating limit. It is normally assessed against site capacity, maximum demand, charger grouping and the behaviour expected when electrical demand changes.

Vehicle-to-Everything (V2X) is an umbrella term for bidirectional EV charging use cases where energy can flow from the vehicle to another load, building, home, grid or wider energy system. It includes V2G, V2H, V2B and V2L depending on the destination of the exported energy.

Vehicle-to-Grid allows an EV to export energy back to the electricity grid or support grid services through compatible charging equipment. It is normally assessed alongside DNO requirements, import/export limits, generation, storage and wider site energy management.