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Multi-use concept, combining food production with offshore wind farms

At Vattenfall’s Danish Kriegers Flak (DKF) and Vesterhav Syd (VHS) offshore wind farms, a Danish research consortium is testing the multi-use concept of producing food alongside fossil-free electricity.

Short facts

Danish Kriegers Flak and Vesterhav Syd offshore wind farms, Denmark
Marine ecosystems
Test the multi-use concept of combining aquaculture with wind farms and identify risks and opportunities for scaling up regenerative aquacultures
2023–2026

Specifically, the project WIN@sea aims to build the practical experience of combining the aquaculture of seaweed and mussels with wind energy production.

Seaweed was successfully harvested in 2025 at both wind farms, while at DKF there was an additional harvest of mussels. As the project is going into the final reporting year in 2026, all cultivation structures have been decommissioned at the DKF site. Meanwhile, another seaweed growing season is currently underway at VHS.

The project will use the practical learnings from the pilots to assess risks and opportunities for scaling up aquaculture practice in wind farms. Such expansion could help improve conditions in marine ecosystems of the Baltic Sea and the North Sea.

In August 2025, Vattenfall launched a brand campaign featuring Hollywood star Samuel L. Jackson. The campaign aimed to promote the multi-use concept and raise awareness about the potential benefits of growing seaweed inside offshore wind farms. The campaign was built around the production of Windfarmed Seaweed Snacks, made from seaweed grown at VHS as part of WIN@sea.

More about biodiversity

Biodiversity and nature protection are a priority at Vattenfall. It is one of the focus areas in our environmental policy and therefore also a central part in our environmental work.