The TetraSpar full-scale demonstration project

The world’s first 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 Technologies.

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 (METCentre), off Karmøy near Stavanger in Norway. Here, the TetraSpar Demonstrator will be commissioned at a water depth of 200 meters.
  • This article will be updated with images as the project progresses.
    Latest update: August 2021.

    Photo credit: The TetraSpar Demonstrator Project ApS.