Deutsche Windtechnik wins new contract to maintain all 30 turbines at Germany first offshore wind farm

Deutsche Windtechnik returns to maintain Germany first offshore wind farm

EWE, the utility that operates Riffgat, has picked Deutsche Windtechnik to maintain all 30 turbines at the wind farm, settling who maintains the turbines at Germany first offshore wind farm for years to come. The new contract starts January 1, 2027, for an initial term of 2 years, with 3 one year extension options that could stretch the arrangement through 2031 if EWE takes every one. Riffgat sits in the German North Sea and generates 108 megawatts total from its 30 Siemens turbines, each rated at 3.6 megawatts, enough capacity to supply electricity for about 120,000 households.

With DWT, we have secured a strong service partner for the maintenance and upkeep of the Riffgat offshore wind farm.

Jantje Bolduan, Offshore Manager at EWE Offshore Centre. Source 1.

What the new maintenance contract covers

The contract covers annual maintenance of the Siemens turbines, expert inspections of the crane and access equipment used to reach them, and ongoing work to find ways to get more output from the wind farm. EWE can also add optional services, remote fault troubleshooting with second level support, on call repair work, and management of spare parts and a warehouse. Maintenance teams work from a base on the island of Borkum, using facilities the operator already has there. In winter, when weather makes travel harder, troubleshooting instead runs from a Deutsche Windtechnik service station in Emden, with technicians flown out to the turbines by helicopter when needed.

Riffgat has run since 2013

Riffgat was built by EWE and completed on site August 10, 2013, the first commercial offshore wind farm in the German North Sea. EWE dates the start of commercial operation to 2014 on its own renewable energy page, a year after construction finished. Deutsche Windtechnik already maintained Riffgat once before, from June 2019 through the end of 2021, when it was the world first independent service provider maintaining offshore Siemens turbines of this kind. The new contract picks up that relationship again after a gap of 5 years.

We are extremely pleased to have won back Riffgat and to have prevailed in the competitive tender process.

Achim Berge Olsen, chief executive of the offshore division at Deutsche Windtechnik. Source 1.

Deutsche Windtechnik scale keeps growing worldwide

Deutsche Windtechnik reported 447 million euros in revenue in 2025, with 2,745 employees and 8,516 wind turbines under contract worldwide, serviced from 742 vehicles, 187 service stations and 9 offshore substations. The company passed 10 gigawatts of turbine capacity under service at the end of November 2020, the point where its own published company history names it as becoming the largest independent service provider in the world, a detail that only shows up by reading that history page directly rather than any outside account of the company. The 30 turbines at Riffgat are a small share of that worldwide total, and the company already holds larger contracts, including 40 Adwen turbines totaling 200 megawatts at Trianel Windpark Borkum I, taken on in 2025.