Developed by:

Mainstream and Ocean Winds

Licensing Award:

ScotWind Offshore Auction


Floating Offshore Wind

Total Capacity

2.3 GW

In 2022, Mainstream and partner Ocean Winds signed a seabed lease with Crown Estate Scotland for the development of a 1.8 GW offshore wind farm off the Shetland Islands in Scotland.

In August 2023, Mainstream and Ocean Winds partnered to develop a second ScotWind site of 500 MW offshore Shetland, expanding the overall footprint of what we have named the Arven Offshore Wind Farm.

As the Norwegian word for heritage or legacy, Arven provides a link to the proud Norse history of the Shetland Islands and to the legacy which both partners plan to create on site.

Offshore wind

Shetland Islands, Scotland

2.3 GW Gross

In Development

Developing floating wind offshore Shetland Islands

Arven Offshore Wind Farm’s two sites are located to the east of the Shetland Islands within a larger area Crown Estate Scotland has called the NE1 area. It is located approximately 22 kilometers from Shetland and has a water depth of approximately 100m, which makes it ideally suited for floating wind.

The Shetland Islands have some of the best wind resources in the world and, with its existing O&G infrastructure there is the potential for power-to-X and other offtake opportunities.

By the numbers


estimated wind farm production


equivalent homes powered


avoided once operational

Related Projects

We are thrilled to progress our plans for the Arven Offshore Wind Farm and, building on Mainstream’s Scottish development experience and the Aker group's decades long offshore heritage in the North Sea, we are ready to take a leading role in industrialising floating offshore wind.

Supporting the UK government's Net Zero ambitions, the wind farm is well placed to capitalise on Scotland's offshore expertise and industry as we work with local partners to explore offtake opportunities.

Sian Lloyd-Rees - UK Country Manager

Media Enquiries

Emmet Curley

Head of Communications and Positioning