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

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

Thor Offshore Wind Farm will be able to supply electricity to approximately one million Danish households

Athens, 25 April 2023

The consortium of Hellenic Cables, the cables segment of Cenergy Holdings, and Jan de Nul have been selected by RWE to deliver the complete package for the submarine and onshore export cable system along with the inter-array cable system for Denmark’s largest offshore wind farm.

With a planned capacity of more than 1,000 megawatts, Thor will be built in the Danish North Sea, approximately 22 km from Thorsminde on the west coast of Jutland. Once fully operational, which is planned no later than 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 the Thor Offshore Wind Farm includes the design, manufacturing, supply, transportation, installation, jointing, termination, and testing of the 275 kV HVAC export cable system and the 66 kV inter-array cable system. The export cable system consists of two 30 km offshore cables, onshore cables with a total length of approximately 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. Highly qualified and experienced personnel following best working practices ensure the delivery of high-quality products and services. Cable production will be phased through 2023-2025 according to the project’s delivery plan.

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: “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: “We are honored that RWE selected Hellenic Cables in cooperation with our partner Jan De Nul for Thor Offshore Wind Farm. With more than 70 years of experience and knowledge to complete some of the most emblematic projects worldwide, we are convinced that Hellenic Cables will meet all the project requirements and contribute substantially towards Denmark’s ambitious climate targets.”

Wouter Vermeersch, Manager Offshore Cables at Jan De Nul Group: “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 Hellenic Cables

Hellenic Cables is one of the largest cable producers in Europe, manufacturing power and telecom cables as well as submarine cables for various industries, including offshore wind and utilities, as well as undertaking turnkey power transmission and distribution projects. Through its fully owned subsidiary Fulgor, Hellenic Cables operates its submarine cables plant in Corinth, Greece, where the production and testing of some of the longest submarine cable lengths without factory joints on a worldwide basis is empowered by the Company’s state-of-the-art facilities and equipment. Since 2012, Hellenic Cables has implemented a EUR 350 million-investment plan for the production of high and extra high-voltage submarine cables at Corinth plant. Hellenic Cables represents the cable production segment of Cenergy Holdings SA. For further information, please visit Hellenic Cables website at

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 oil and gas 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 about our company, please visit our website at

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 gigawatts 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. RWE 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. Government-mandated phaseout roadmaps have been defined for both of these 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 Group

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