Mainstream Renewable, Ocean Winds Unite for U.K. Offshore Wind


Mainstream Renewable Power, a global pureplay renewable energy company, and Ocean Winds, the international joint venture between EDPR and ENGIE dedicated to offshore wind energy, have partnered to develop a second ScotWind site of 500 MW east of Shetland, expanding the overall footprint of the Arven Offshore Wind Farm to 2.3 GW.

Arven comprises two sites. The first is the 1.8 GW site east of the Shetland Islands, which was awarded to the joint venture between Mainstream and Ocean Winds as part of the ScotWind leasing process in 2022. Separately, Ocean Winds was awarded a 500 MW site in the same NE1 block. Mainstream has completed its acquisition of a 50% share in Ocean Wind’s holding company, and the two sites are now being developed collaboratively to maximize their potential.

Mainstream and Ocean Winds have a longstanding partnership. The companies are currently developing a 1.2 GW floating offshore wind farm in South Korea and are in a consortium for the upcoming Utsira Nord floating offshore wind tender in Norway. By extending this partnership and developing the two sites off Shetland, Mainstream and Ocean Winds will leverage their combined expertise to increase benefits for Shetland and Scotland, create supply chain opportunities and jobs, while contributing to the U.K.’s net zero ambition.

The partners have commenced early-stage local engagement, meeting with supply chain partners, local authorities and fisheries representatives.

“The collaboration between Ocean Winds and Mainstream Renewable Power marks a significant milestone, combining our expertise and resources to develop our largest floating offshore wind farm to date,” says Adam Morrison, U.K. country manager for Ocean Winds. “This experienced partnership will capitalize on delivery experience both in Scotland and internationally.”

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