Greece initiates Corinth-Kos high-voltage undersea cable project

The Independent Power Transmission Operator (ADMIE) has signed a contract with Hellenic Cables, a subsidiary of Cenergy Holdings, to begin the Corinth-Kos electrical interconnection project. The project, valued at approximately 1.48 billion to 1.5 billion euros, involves the study, procurement, construction, and installation (EPCI) of a 320 kV high-voltage direct current (HVDC) system.

The interconnection will consist of roughly 1,260 to 1,290 km of submarine cables and 30 km of underground cables, with a power transmission capacity of 1,000 MW. Construction is expected to begin in the fourth quarter of 2026, with completion targeted for 2030.

This strategic infrastructure project aims to connect the Dodecanese islands to the Greek mainland's electrical grid, ending their energy isolation. It will facilitate the connection of Rhodes and Karpathos, as well as several smaller islands. The project is intended to reduce reliance on local fossil fuel units, enhance energy security, and lower electricity production costs for consumers by transitioning to greener energy sources.