ADMIE: Subsea Cable Awards to Fulgor and Prysmian Mark Major Grid Interconnection Milestone

Strategic Infrastructure Shift: From Isolated Grids to Integrated Energy System

The Independent Power Transmission Operator (ADMIE) has completed a key phase in its island interconnection programme, finalizing the electronic auction and ranking of bids for high-voltage subsea and underground cable supply contracts.

The procurement concerns 150 kV HVAC technology cables, forming the backbone of Greece’s most ambitious grid integration effort to date, spanning the Dodecanese, North Aegean, Ionian, and Saronic island clusters.

Total framework value: €2.07 billion (excluding VAT), under a six-year supply agreement covering design, manufacturing, and installation.

Award Outcome: European Cable Giants Secure Strategic Packages

Following competitive evaluation based on the most economically advantageous offer, the contracts were split between two major industrial players:

• Fulgor S.A. — awarded the first package, covering interconnections including Thrace–Lemnos, Kos–Rhodes, Lesvos–Lemnos, and Lesvos–Chios
• Prysmian Powerlink Srl — awarded the second package, covering a broader network including Rhodes–Karpathos, Skyros–Lesvos, Samos–Kos, Chios–Samos, Aegina–Megara, and Kefalonia–Kyllini, among others

The final contractual stage is expected to proceed with formal award ratifications.

Industrial Significance: Supply Chain Bottlenecks and Capacity Competition

ADMIE’s procurement model reflects a broader European trend: tight supply conditions in subsea cable manufacturing, driven by surging demand from offshore wind farms, cross-border interconnectors, and energy security projects.

The introduction of a framework agreement structure is increasingly seen as a strategic response to:

• Limited global production capacity for HV submarine cables
• Long lead times for industrial manufacturing slots
• Intensifying competition among European grid operators

This mechanism effectively secures production time allocation (“factory slots”), reducing execution risk for multi-year infrastructure pipelines.

System Impact: From Energy Islands to Integrated Grid Architecture

The awarded projects are central to Greece’s long-term energy restructuring strategy:

• Dodecanese interconnection: linking Rhodes, Kos, and Karpathos to the mainland system via Corinth in phased rollout
• North Aegean network: integrating Lesvos, Chios, Samos, Lemnos, and Skyros into a unified transmission architecture
• Ionian and Saronic expansions: enhancing redundancy and grid stability across smaller island systems

These projects aim to transition Greece from a fragmented island-based electricity model to a fully interconnected national grid system.

Economic and Energy Security Implications

ADMIE frames the programme as a structural investment in:

• Lower generation costs in island systems currently reliant on diesel and imported fuels
• Increased penetration of renewable energy sources
• Improved system reliability and reduced blackout risk
• Long-term environmental impact reduction through fossil fuel displacement

From a macroeconomic perspective, the interconnections also function as hidden infrastructure subsidies, reducing the fiscal burden of island energy isolation.

Infrastructure as a Regulated Growth Asset

The scale and structure of the programme highlight ADMIE’s evolving role as a pan-European regulated infrastructure operator, increasingly aligned with EU energy integration priorities.

For investors and policymakers alike, the project pipeline reinforces a broader narrative: transmission infrastructure is becoming a strategic asset class, driven not only by national energy needs but by continental system resilience requirements.