RWE partners with Jan De Nul Group for Offshore Wind Installation Vessels

World’s largest jack-up installation vessel “Voltaire” and heavy lift vessel “Les Alizés” will be deployed exclusively at RWE offshore wind construction projects

RWE partners with Jan De Nul Group for Offshore Wind Installation Vessels

RWE has signed an agreement with Jan De Nul Group to secure the long-term usage of two next-generation installation vessels for future offshore wind foundation and turbine construction. 

The charters are supported by a Service Agreement through which Jan De Nul Group will provide both in-house and market solutions and services, to support and perform installation campaigns for RWE’s offshore wind projects. Through these contracts RWE secures vessel capacities and services in a tight market.

The partnership includes the exclusive and long-term charter of the two specialist next-generation offshore installation vessels “Les Alizés” and “Voltaire”. Both can be used at RWE’s current and future offshore construction projects and, if needed, to run maintenance campaigns at its existing offshore wind fleet.

“Les Alizés” has been chartered for more than five years, and is a purpose-built vessel designed for transporting, lifting and installing wind turbine foundations. With the ability to lift up to 5,000 tonnes and with a deck loading capacity of 61,000 tonnes, she is future-proofed by being capable of handling the scale and design of future foundations that will support the next generation of wind turbines. RWE plans to first deploy this vessel at its Danish offshore project Thor. Foundation installation works for this 1,000-megawatt wind farm are due to take place in 2025.

“Voltaire” is the world’s largest jack-up installation vessel with a crane capacity of 3,200 tonnes and approximately 130-metre long legs. Her innovative design makes the vessel highly suitable for the installation of next generation wind farms in deep waters. She has been chartered to RWE for more than four years, from 2027 onwards. Subject to the project’s final investment decision, RWE plans to first use this vessel to install the turbines of its Hollandse Kust West VII wind farm off the Dutch coast.

With this framework agreement, the two companies are continuing their cooperation. During 2021 and 2022, Jan De Nul Group provided installation services supporting the construction of RWE's offshore wind farm Kaskasi off the German coast. More recently, Jan De Nul Group has been awarded with the export and inter-array cable installation scopes on RWE's Thor offshore wind farm.