Data centre connection requests submitted to Greek transmission operator ADMIE have reached approximately 9 GW, increasing pressure on high-voltage capacity. The queue has intensified competition for grid access and prompted questions about how projects should be prioritised.
Applications have risen from just under 5 GW in mid-June. The reported total refers to requested connections rather than confirmed construction or future electricity consumption.
First-come, first-served review and capacity reservation risk
Greek authorities are examining whether the current first-come, first-served approach should be replaced with a system that prioritises more advanced developments. The review focuses on how connection capacity is allocated as the application pipeline grows.
A key concern is that projects lacking sufficient permits, financing or commercial backing could reserve scarce capacity for years. That could delay investments that are otherwise ready to proceed.
Attica congestion shifts siting decisions beyond Athens
Grid constraints are also influencing where developers plan new data centres. Congestion in Attica is encouraging developers to consider sites beyond the Athens area.
A PwC roadmap estimated potential capacity of approximately 630 MW in western Macedonia, 605 MW in Thessaly, 485 MW in central Macedonia and 480 MW in central Greece. These figures are not guaranteed connection offers.
Deliverable connections depend on network and operational readiness
Developers are required to assess access to reliable electricity, cooling requirements and the cost of network reinforcement. These factors determine whether a project can secure a deliverable connection.
The growing application queue signals investor interest, but the commercial advantage will accrue to projects that obtain a deliverable connection rather than only a position in the queue.
