The TetraSpar full-scale demonstration project

The world’s first fully industrialized offshore foundation

The TetraSpar Demonstration Project is the world’s first full-scale demonstration of an industrialized offshore foundation. The project is carried out in a partnership between Shell, RWE, TEPCO Renewable Power, and Stiesdal Offshore.

Project basics:

    • The TetraSpar foundation is a tetrahedral structure assembled from tubular steel components. It is expected to offer important competitive advantages with its potential for lean manufacturing, lean assembly and installation processes, and low material costs.
      The foundation and keel were assembled using no welding at the Port of Grenaa in Denmark.
      A 3.6 MW wind turbine from Siemens Gamesa Renewable Energy was mounted on the foundation following launch in the harbor basin.
      In July 2021 the combined structure was towed to the test site at the Marine Energy Test Centre, 10 kilometers off Karmøy in Norway. Here, the TetraSpar Demonstrator was commissioned and is in full operation at a water depth of 200 meters.
  • Video: Experience industrialization in action in this short film documenting the pioneering TetraSpar floating wind foundation.

    The TetraSpar story in images

    This page will be updated as the project progresses.

    Photo credit: The TetraSpar Demonstrator Project ApS.