Data centre connection requests submitted to Greek transmission operator ADMIE have reached approximately 9 GW, increasing pressure on high-voltage capacity allocation. The level of demand has prompted questions about how projects should be prioritised within the connection process.
Requested capacity rises beyond mid-June levels
Applications increased from just under 5 GW in mid-June to the current total of about 9 GW. The figure reflects requested connections rather than confirmed construction or future electricity consumption. Authorities are reviewing whether the existing first-come, first-served approach should be replaced by a system that prioritises more advanced developments.
Permits and financing concerns for scarce grid access
The concern is that projects lacking sufficient permits, financing or commercial backing could reserve scarce capacity for years. This could delay investments that are ready to proceed under existing grid constraints. The issue is linked to how long connection capacity may remain tied up before projects reach delivery stages.
Attica congestion shifts proposed locations
Grid constraints are also influencing location choices for data centre developments. Congestion in Attica is encouraging developers to consider sites beyond the Athens area. Developers assessing new locations must account for both network conditions and connection feasibility.
Regional capacity estimates and project due diligence requirements
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 estimates should not be treated as guaranteed connection offers. Developers must also evaluate access to reliable electricity, cooling requirements and the cost of network reinforcement.
The growing application queue indicates investor interest, but the decisive commercial advantage will be held by projects that secure a deliverable connection rather than only a position in the queue.
