Allseas delivers BorWin epsilon offshore wind converter

The two-week offshore campaign concluded on 18 May, with the safe set-down of the 12,300-tonne topside, housing high-voltage direct current (HVDC) technology that will convert power from offshore wind turbines into direct current for efficient transmission to shore.

Allseas’ scope covered transport, installation, piling and grouting of the 7,500-tonne jacket and topsides, all executed by Pioneering Spirit’s state-of-the-art lifting systems. The operation required no support vessels, reflecting the vessel’s unique ability to carry out heavy-lift campaigns independently.

This streamlined, all-in-one approach was made possible by close coordination between our offshore crews and onshore engineering, project and support teams. Their integrated planning and execution reduced project complexity, risks and timelines.

Delivered in partnership with our client Dragados Offshore, who designed and built the converter platform in a consortium with Siemens Energy, the project highlights Allseas’ growing reputation as a trusted offshore wind transport and installation partner. 

Once operational end of 2025, as the centrepiece of the BorWin5offshore grid connection, the BorWin epsilon converter station will serve as the central hub for EnBW’s He Dreiht wind farm, converting 900 MW of wind-generated power for transmission to shore – enough to supply around 1.1 million homes with clean electricity.

Driving Europe’s offshore wind ambitions 
BorWin epsilon marks Allseas’ second full offshore converter platform installation, following the DolWin kappa project in 2022. These landmark projects confirm Allseas’ evolving role as a key enabler of Europe’s offshore wind expansion.

To date, Allseas has delivered converter platforms supporting 4.2 GW of European renewable energy capacity. Looking ahead, our growing T&I portfolio – including the ambitious TenneT 2GW programme – will contribute to the delivery of over 30 GW of clean power to homes and businesses across Europe.

“This project is another proud milestone for Allseas. Again, our in-house engineering, project management and offshore execution capabilities combined to deliver complex offshore infrastructure safely, efficiently and at scale,” says Matthijs Groenewegen, Allseas Vice President Projects. 

“As Europe ramps up the expansion of its offshore wind capacity, our vessel offers developers an unmatched solution to accelerate project timelines and realise their energy transition ambitions. Our ability to deliver entire offshore converter installations with a single vessel sets us apart.”