Wedoany.com Report-Jul. 6, The offshore substation (OSS) for the 496 MW Dieppe Le Tréport offshore wind farm has been successfully installed 15 kilometers off Le Tréport and 17 kilometers off Dieppe, France. This milestone advances the development of one of France’s key renewable energy projects.

Designed and constructed by Atlantique Offshore Energy, a division of Chantiers de l’Atlantique focused on marine energy, the substation arrived in Le Havre in June 2025. Its foundation, a 54-meter-tall steel jacket weighing approximately 1,900 tonnes, was manufactured by Navantia at the Puerto Real shipyard in Spain. The installation at sea was completed by DEME using its vessel, Gulliver.

Frédéric Grizaud, Director of the Marine Energies Business Unit at Chantiers de l’Atlantique, stated: “This extremely precise and well-prepared phase ends 24 months of construction of the Dieppe-Le Tréport topside at our Saint-Nazaire site. Through this project, we continue to strengthen Chantiers de l’Atlantique’s position as a key player in marine renewable energy in Europe. We are thankful to Eoliennes en Mer Dieppe Le Tréport (EMDT) for their trust, as well as to all the teams involved. Now their mission goes on with the completion of offshore works, testings, and then the energization of the substation.”

Once operational, the substation will collect electricity generated by the wind farm’s 62 Siemens Gamesa 8 MW turbines and transmit it to the shore through grid infrastructure managed by France’s transmission system operator, Réseau de Transport d’Électricité (RTE). This setup will ensure efficient delivery of renewable energy to the region.

The Dieppe Le Tréport project is led by Eoliennes en Mer Dieppe Le Tréport (EMDT), with shareholders including Ocean Winds, Sumitomo Corporation, and Banque des Territoires. Marc Hirt, Country Manager for Ocean Winds in France, noted: “Following the first power of the EMYN project last month and our continued progress on EFGL, the successful installation of the Dieppe – Le Tréport offshore substation is another significant milestone for Ocean Winds, and a further demonstration of the momentum building across France’s offshore wind sector.”

The project supports France’s renewable energy goals, enhancing clean energy supply without impacting trade dynamics. Ongoing work includes completing offshore installations, testing, and energizing the substation to fully integrate the wind farm into the national grid.