Vestas’ 16 V112-3MW turbines were installed over the summer by the MPI Discovery vessel, at the project site off Sweden's south-east coast.
Installation was completed in late July and all the turbines were generating electricity from 11 August.
The 48MW development will be officially inaugurated on 27 September
Michael Lewis, E.on Climate & Renewables chief operating officer wind power, said: "E.on and Vestas have a long history working together to develop offshore wind projects.
"We wanted to work closely together again with the same professional project team who we collaborated with on the Robin Rigg project in the UK."
Vestas considers this offshore installation a major milestone as a large proportion of each turbine's assembly happened onshore.
The turbines were assembled at a new facility at Esbjerg harbour, Denmark.
The nacelles arrived at the port with the hub and drivetrain already mounted and tested. The blades arrived at the harbour ready to be inserted into the hub. The tower came in two sections, assembled and put into an upright position prior to shipping.
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