The DanTysk and Sandbank wind farms off Denmark will be serviced by German operations and maintenance (O&M) outfit Deutsche Windtechnik, after the contractor won an EU tender to expand the scope of its current deal to service the projects’ more than 150 turbines.

The two-year contract sees Deutsche Windtechnik providing “inspection and corrective maintenance” to 80 Siemens Gamesa SWT-3.6MW machines and 72 of its SWT-4.0MWs, including transition pieces, in-tower lifts and cranes.

“Deutsche Windtechnik provides all of the necessary services from a single source and has significant experience in the maintenance of Siemens turbines. This is an excellent basis for maintaining optimal availability at both wind farms,” said Allan Overbeck, Vattenfall’s head of operations in the Nordic and German markets.

Deutsche Windtechnik director Matthias Brandt added: “In 2019 at the Riffgat wind farm, we became the first independent service provider to take on the offshore maintenance for Siemens SWT-3.6 systems. The experience that we gained there will now be of benefit to us in providing turbine maintenance at the DanTysk and Sandbank offshore wind farms.”

Maintenance work will begin in April from the base port in Esbjerg, using a service operation vessel to shuttle day-workers out to the wind farms, which lie 70-90km off Sylt, with an accommodation platform available on DanTysk for longer assignments.

DanTysk came online in 2014, followed by Sandbank in 2017.