EWIC meaning

EWIC is the East–West Interconnector, the 500 MW high‑voltage direct current (HVDC) subsea electricity link between Ireland (Woodland, Co. Meath) and Great Britain (Deeside, North Wales). In legal practice it is treated as an interconnector for regulatory purposes and is frequently referenced in energy regulation, grid codes, trading and capacity allocation documents, and project and finance agreements. It is owned and operated by EirGrid Interconnector DAC and regulated by Ireland’s Commission for Regulation of Utilities (CRU) and, on the GB side, by Ofgem under the Electricity Act 1989 interconnector licensing regime. The term itself is a descriptive label rather than a statutory definition, though it is defined in relevant licences, access rules and market codes. EWIC enables cross‑border power trading between the I‑SEM and GB electricity markets. Post‑Brexit, day‑ahead and intraday capacity is generally allocated by explicit auction (for example via JAO), with nomination into I‑SEM and GB balancing and trading arrangements; outage and transparency obligations apply under EU REMIT (Ireland) and GB REMIT. Usage and legal effect are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland; practitioners encounter EWIC in contexts such as congestion management, connection and use‑of‑system, ancillary services, and security‑of‑supply planning.