European Offshore Energy Advances: Greek Grid Interconnection Lands €1.5B Contract, Portugal Wave Project Gains Momentum

## European Offshore Energy Sector Marks Major Milestones Europe's offshore energy sector is registering significant forward movement on two fronts this week, with a multi-billion-euro subsea interconnection contract awarded in Greece and construction progress reported on Portugal's first utility-scale wave energy project. ### Greek Interconnection Secures €1.5 Billion Turnkey Deal Hellenic Cables, the cables division of Belgium-headquartered Cenergy Holdings, has been awarded a €1.5 billion turnkey contract for a major Greek grid interconnection project, according to Offshore Energy. The contract represents one of the largest single awards in the European subsea cable sector in recent memory and underscores the accelerating pace of offshore grid investment across the continent. The deal positions Hellenic Cables as a central player in Greece's broader energy transition strategy, which includes integrating renewable energy sources from island networks into the mainland grid. Turnkey contracts of this scale typically encompass engineering, procurement, manufacturing, installation, and commissioning — reflecting the complexity and strategic importance of the infrastructure involved. For the wider maritime and offshore industry, the award signals continued strong demand for specialised cable-lay vessels, offshore survey work, and marine logistics support as European nations race to modernise and expand their subsea energy infrastructure. ### Portugal's Wave Energy Project Advances with Breakwater Works In Portugal, physical construction is now underway to support Eco Wave Power's 1 MW wave energy demonstration project, with breakwater rehabilitation works having commenced at the designated site, Offshore Energy reports. The rehabilitation of the breakwater structure is a critical enabling step, as the wave energy converters will be affixed to the coastal infrastructure to harness the kinetic energy of incoming waves. At one megawatt, the project is modest in scale but carries outsized significance as a proof-of-concept for grid-connected wave energy in Southern Europe. Wave energy has long been considered one of the more technically challenging renewable sectors to commercialise, and successful deployment at this site could help validate the technology for larger rollouts along Europe's extensive Atlantic coastline. Eco Wave Power has previously operated installations in Gibraltar and Israel, and the Portuguese project represents a continued expansion of the company's operational footprint in European waters. ### Broader Context Together, these developments reflect the deepening maturation of Europe's offshore energy economy — spanning not only wind, but subsea transmission infrastructure and emerging marine renewables such as wave energy. For maritime service providers, port operators, and vessel owners, the pipeline of offshore energy projects across the continent continues to represent a substantial and growing source of commercial opportunity.