Delivering sustainable growth


85 years expertise in metal processing


Delivering sustainable growth


Delivering sustainable growth


Transforming the future


Building for a sustainable future


The consortium of Hellenic Cables and Jan de Nul signs a contract with RWE for Thor, the largest offshore wind farm in Denmark






Brussels, 25 April 2023


Cenergy Holdings announces that RWE selected a consortium formed by Jan de Nul and Hellenic Cables, its cables segment, to deliver the complete cable system package for Thor, Denmark’s largest offshore wind farm.

With a planned capacity of more than 1,000ΜW, the Thor Offshore Wind Farm will be built in the Danish North Sea, approximately 22 km from Thorsminde on the west coast of Jutland.  Once fully operational, planned no later than the end of 2027, Thor should be capable of producing enough green electricity to supply the equivalent of more than one million Danish households.

The turnkey project for Thor includes the design, manufacturing, supply, transportation, installation, jointing, termination, and testing of the 275kV HVAC export cable system and the 66kV inter-array cable system.  The export cable system consists of two 30 km offshore cables, onshore cables with a total length of approx. 26 km and related accessories.  The inter-array cable system consists of approximately 200 km of submarine cables and associated accessories.

The cables will be produced at Hellenic Cables’ vertically integrated, state-of-the-art submarine cables plant in Corinth, Greece.  Cable production will be phased through 2023-2025.

Jan De Nul will take care of the transport and installation of the export and inter-array cables using its Cable Laying Vessel Connector and will protect the offshore cables by burying them under the seafloor using one of its powerful subsea cable trenchers. 
Pål Coldevin, Executive Vice President Offshore Development Nordics, Poland & Baltics at RWE Offshore Wind commented: “With Thor, we will massively contribute towards Denmark’s ambitious climate targets. In order to deploy this offshore project, we will rely on our track record of more than 20 years in offshore wind and on experienced suppliers, like Hellenic Cables and Jan de Nul."

Alexis Alexiou, CEO of Cenergy Holdings noted: “We are honored that RWE selected Hellenic Cables in cooperation with our partner Jan De Nul for Thor Offshore Wind Farm.  Our project execution experience around the world is spanning more than 70 years and offers us the conviction Hellenic Cables will, once more, meet all requirements and contribute substantially towards Denmark’s ambitious climate targets.”

Wouter Vermeersch, Manager Offshore Cables at Jan De Nul Group, added: “We are pleased to extend the successful cooperation between Jan De Nul and Hellenic Cables to support RWE in building the largest offshore wind farm in Danish waters.  Our versatile vessels are ideally suited to install both the export as well as the inter-array cables in the challenging North Sea environment on the West coast of Denmark.”


About RWE 

RWE is leading the way to a green energy world. With an extensive investment and growth strategy, the company will expand its powerful, green generation capacity to 50 GW internationally by 2030. RWE is investing more than €50 billion gross for this purpose in this decade. The portfolio is based on offshore and onshore wind, solar, hydrogen, batteries, biomass and gas. RWE Supply & Trading provides tailored energy solutions for large customers and has locations in the attractive markets of Europe, North America and the Asia-Pacific region.  The company is responsibly phasing out nuclear energy and coal as government-mandated phaseout roadmaps were defined for both energy sources.  RWE employs around 19,000 people worldwide and has a clear target: to get to net zero by 2040. On its way there, the company has set itself ambitious targets for all activities that cause greenhouse gas emissions.  The Science Based Targets initiative has confirmed that these emission reduction targets are in line with the Paris Agreement.
Very much in the spirit of the company’s purpose: Our energy for a sustainable life.  For more information about the Thor offshore project, please visit


About Jan De Nul

Jan De Nul is a modern and innovative company that solves complex challenges of today’s society. Their talented people develop sustainable solutions that contribute to the energy transition, securing the future of the next generation.  Their expertise lies in five main activities: offshore energy, dredging and maritime construction, civil construction, environmental activities and project development.  They enable the production of offshore energy and maintain the depth of waterways.  They build new ports and create extra land.  They realise complex infrastructure works and erect any type of building.  They tackle pollution in whatever form. From design and engineering to the execution and maintenance, they unburden their clients with overall solutions that combine one, several or even all activities.  For more information, please visit


About Cenergy Holdings

Cenergy Holdings is a Belgian holding company listed on both Euronext Brussels and Athens Stock Exchange, investing in leading industrial companies, focusing on the growing global demand of energy transfer, renewables and data transmission.  The Cenergy Holdings portfolio consists of Corinth Pipeworks and Hellenic Cables, companies positioned at the forefront of their respective high growth sectors.  Corinth Pipeworks is a world leader in steel pipe manufacturing for the energy sector and major producer of steel hollow sections for the construction sector.  Hellenic Cables is one of the largest cable producers in Europe, manufacturing power and telecom cables as well as submarine cables for the aforementioned sectors.  For more information, please visit our website at