East Anglia Three converter station jacket beds down in North Sea
Power Engineering International
Posted on: 26 August 2025
Weighing in at around 3,700 tonnes, the four-legged jacket foundation for the East Anglia Three offshore wind farm is now fixed to the seabed.
ScottishPower Renewables has confirmed that the steel structure that will house the HVDC offshore converter station for the East Anglia Three offshore wind farm has been successfully installed in the southern North Sea.
Weighing in at around 3,700 tonnes and standing 59 metres high, the four-legged jacket foundation for the £4 billion ($5.4 billion) East Anglia Three offshore wind farm is now fixed to the seabed – 69km off the coast of Suffolk – at a water depth of 36m.
The installation was completed by Heerema Marine Contractors’ SSCV Sleipnir crane vessel after sailing in from Aker Solutions’ Verdal fabrication yard in Norway.
The 1.4GW East Anglia Three offshore wind farm will be the largest windfarm across the Iberdrola group and among the largest in the world when it comes into operation at the end of 2026 – producing enough clean energy to power the equivalent of more than one million homes.
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Pedro Fernandez, ScottishPower Renewables’ East Anglia THREE Project director, said: “The offshore construction programme for East Anglia THREE is the biggest feat of engineering we’ve ever undertaken – to see 3,500 tonnes of steel lifted safely and securely into place, with exacting and medical precision, is a truly impressive sight.
“This is the latest milestone for the project and is testament to the tremendous teamwork with our supply chain partners, so my thanks to everyone involved from ScottishPower, Aker Solutions and Heerema."
The installation of the converter station foundation jacket was also supported by tugs Bylgia, Skandi Handler and EEMS Wrangler, as well as the guard vessel, Tess.
