Information
Definition
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.
Why it matters
It is relevant to future UK flexibility, export control, DNO connection requirements and bidirectional charger specifications. For UK users, it affects DNO engagement, grid capacity, export/import limitation and whether a design is practical at the chosen site.
References
Standards and regulations
ISO 15118
ISO 15118 is the international vehicle-to-grid communication standard series covering EV-to-charger digital communication, Plug & Charge, smart charging and bidirectional charging functions. In the UK it is increasingly relevant to future-ready public, fleet and V2G-capable charging systems.
ENA EREC G99
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.
ENA EREC G100
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.