Great Sea Interconnector faces Turkish opposition amid new investment

The Great Sea Interconnector (GSI) project, aimed at linking the electricity grids of Greece, Cyprus, and Israel, is entering a new phase of development amid geopolitical tensions in the Eastern Mediterranean. The project has gained momentum following the entry of the French infrastructure company Meridiam as a major shareholder, which officials suggest confirms the project’s economic viability and security.

Turkey has raised objections, demanding “prior notification and coordination” before any research or cable-laying activities begin in maritime areas it claims as its own jurisdiction. Ankara argues that such communication is necessary to avoid conflicts. However, Greek officials, including Government Spokesperson Pavlos Marinakis and Deputy Foreign Minister Tasos Hatzivasilis, have rejected these demands, stating that the project will proceed according to international law and the Law of the Sea without requiring Turkish permission.

On the regulatory side, the Hellenic Electricity Distribution Network Operator (HEDNO) has proposed new financing models, including adjusted gearing ratios to reflect the project's changing financial profile during construction and operation. The project also appears to have strengthened political backing from the United States and France, viewed as a key step for European energy security and for ending the energy isolation of Cyprus.