Nari, in partnership with Electromec, was selected as provisional contractor for the high-voltage substation on Serifos within Cyclades Interconnection Phase D, which creates the Lavrio–Serifos–Milos–Folegandros–Thira–Naxos transmission corridor. The consortium’s scope is to deliver a new 150 kV GIS onshore substation on Serifos, including design, supply of primary and secondary equipment, and full construction and commissioning. This facility will interface with the 150 kV submarine links and integrate Serifos into the broader southwest Cyclades grid connection that ultimately ties into Thira and Naxos.