System Testing

DELAYED +1yr (Apr 2026): System testing was projected for 1 January 2029. More recent documents place commercial operations around 2029–2030, and the CRU’s May 2025 Initial Project Assessment specifies a planned commercial operations date of 2030. Allowing for commissioning ahead of COD, comprehensive system testing is more likely during 2030, so this milestone is delayed to mid‑2030 (30 June 2030), approximate. --- According to MaresConnect’s published project timeline, system testing of the 750 MW HVDC interconnector between Ireland and Great Britain is scheduled to take place in 2029 alongside the commencement of operations, following prior construction of the converter stations and subsea/underground cables. Later information from project owner Foresight Group confirms that commercial operations are expected by 2029, supporting this testing timeframe.