DanTysk is a 288 megawatt (MW) offshore wind farm in the North Sea 70 kilometres (43 mi) west of the island Sylt, in the German EEZ at the border to Denmark. The wind farm operates 80 Siemens Wind Power's SWT-3.6-120 turbines with a capacity of 3.6 MW each. The project's estimated cost was $900 million. The windfarm is sited in water depths of 21–31 metres (69–102 ft). The turbines were kept warm and healthy with diesel generators for 6 months before onshore cabling was fixed. The farm sent first power to shore in December 2014.