Atlantique Offshore Energy is proud to be part of this success delivering the complete Engineering, Procurement, Construction, Installation, Commissioning and Maintenance of the Offshore Substation (Topside and Jacket type foundation).

For this offshore wind farm consisting of 60 wind turbines rated at 6+ MW each, developed by the German energy company E.ON and the Norwegian company Equinor (formerly Statoil) and connected to the electricity network by the German transmission system operator 50Hertz, Chantiers de l’Atlantique, through its Atlantic Offshore Energy Business Unit, designed, built, installed and commissioned the largest electrical substation* ever built in a single module. With a weight of more than 4,000 tonnes and a capacity of 385 MW, the substation transfers the carbon-free electricity produced by wind turbines to the equivalent of 400,000 households in Germany.

Ordered in June 2015, the substation consists of a topside 50 metres long, 35 metres wide and 15 metres high, entirely designed and built by Chantiers de l’Atlantique in Saint-Nazaire (Loire-Atlantique), then transported in February 2018 by barge to its installation location in the Baltic Sea, about 35 kilometres off the coast of Rügen Island.

This “smart”, fully automated substation is designed to be able to manage the wind farm autonomously, without human intervention, thanks to a large electronic PLC system.

Chantiers de l’Atlantique also provided the foundation for the substation, a 53-metre high jacket structure with a total weight of 1,800 tonnes. The unit was delivered ahead of schedule and commissioned and to the customer in the summer of 2018.

This “turnkey” project, completed in record time, testifies to the excellent cooperation between the German, Norwegian and French experts in marine renewable energy. It also reflects the expertise of the teams at Chantiers de l’Atlantique, who applied the processes and technologies learned through building large complex ships to design this substation, achieving weight savings of around 20% on the metal structure, which significantly reduced construction costs and facilitated the installation.

Chantiers de l’Atlantique is clearly one of the leaders in the European energy transition, with the completion of the Arkona substation and the first two substation projects for the Westermost Rough Offshore Parks for Orsted (formerly Dong Energy) (2014), and Rentel (2018), both located in the North Sea (in Great Britain and Belgium respectively). In all, the electrical substations built by Chantiers de l’Atlantique transmit 1,000 MW of carbon-free electricity, equivalent to the consumption of one million households.


Arkona Offshore Windfarm is inaugurated April 16th by E.ON and Equinor in the German Baltic sea


Atlantique Offshore Energy is proud to be part of this success delivering the complete Engineering, Procurement, Construction, Installation and Commissioning of the Offshore Substation (Topside and Monopile type foundation). This key component of the Windfarm is collecting and transforming 309 megawatts of renewable energy produced by the Wind Turbines, which can theoretically supply around 300,000 households.


Rentel Offshore Windfarm is inaugurated April 30th by Otary in the Belgian North sea.