EnBW has installed all 64 foundations at its 960MW He Dreiht offshore wind farm in the German North Sea as planned.
The Thialf (pictured), one of the largest floating cranes in the world from the Heerema company, rammed the monopiles into the seabed within a good three months.
The 70-metre-long steel foundations have a diameter of 9.2 metres and a weight of around 1,350 tonnes each.
Transition pieces were placed on the monopiles, which serve as connectors between the tower of the wind turbine and the monopile.
He Dreiht is being built about 85 kilometres northwest of Borkum and about 110 kilometres west of Heligoland.
More than 500 people work at peak times on this large construction site in the middle of the sea and more than 60 ships are involved, EnBW said.
From spring 2025, the latest generation of wind turbines from Vestas will be installed, each with a capacity of 15MW.
The wind farm is scheduled to go into operation at the end of 2025.
In the first offshore tender in Germany, EnBW secured the contract for the project in 2017.
He Dreiht will manage without state subsidies.