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Greenlink is a proposed 500 megawatt (MW) subsea and underground cable electricity interconnector (with associated converter stations) between the existing electricity grids in Ireland and Great Britain (GB), allowing for electricity to flow both ways between the two countries. The cable will stretch approximately 200km under the Irish Sea to connect EirGrid’s Great Island substation in County Wexford (Ireland) and National Grid’s Pembroke substation in Pembrokeshire (Wales).

Greenlink has key strategic importance, as it will provide significant additional interconnection between Ireland, the UK and continental Europe, contributing to each country’s interconnection objectives, enhancing energy security and enabling the further integration of renewable, low carbon energy sources.

Constructing and commissioning an interconnector requires the completion of a thorough programme of environmental and technical assessment to ensure that the final interconnector design fully considers the environment in which it is built. The Greenlink interconnector is scheduled to commence construction in 2020 and is planned for commissioning in 2023.