Press Release Contact Karola Kletzsch Corporate Communications Telephone +49 421 69 105 330 Mobile +49 172 263 77 89 E-Mail k.kletzsch@ deutsche-windtechnik.com Bremen 25.04.2019 Page 1/3

Deutsche Windtechnik achieves a new milestone: Maintenance for Siemens SWT-3.6 at the Riffgat offshore

Deutsche Windtechnik has been awarded the contract to provide maintenance for 30 Siemens SWT-3.6-120 wind turbines at the Riffgat offshore wind farm as part of an EU tender procedure that was initiated by EWE Offshore Service und Solutions GmbH (EWE OSS). The contract begins in June 2019. The two companies have been working together closely for more than two years at the offshore wind farm alpha ventus, and their cooperation will now continue at the Riffgat offshore wind farm as a result of the EU tender. The contract includes basic maintenance, troubleshooting, remote fault elimination, spare parts management, maintenance of safety equipment and testing of electrical equipment in accordance with DGUV V3.

This makes Deutsche Windtechnik, which operates independently from manufacturers, the first ISP (Independent Service Provider) in the world to provide maintenance for Siemens SWT-3.6 turbines. "We are very pleased to be able to provide the service for this great system technology. Utilising synergies and planning for the long-term enable operators to save significant costs with us. This also applies to the Borkum Cluster that EWE OSS is planning. Deutsche Windtechnik is an optimal service partner that delivers customised added value from Borkum/Emden to customers who are active in the Borkum Cluster," said Jens Landwehr, Managing Director of Deutsche Windtechnik Offshore und Consulting GmbH. By the year 2021, several hundred turbines with an output of almost 6,000 megawatts will no longer be covered by the manufacturer's guarantee. Martin Swart, Senior Manager of the Engineering Department for Siemens turbines at Deutsche Windtechnik Service, added: "Our comprehensive experience with nearly 4,000 wind turbines on land, including more than 700 wind turbines with AN Bonus / Siemens technology, and our many years of offshore experience mean that we are also well equipped for turbine maintenance at sea. In addition to providing maintenance for the turbines, we are also responsible for any repairs and the replacement of large components."

Prospects for a growing partnership in the Borkum cluster The Riffgat offshore wind farm, which was built by EWE in 2013, is the first commercially operated wind farm in the German . In addition to its own offshore activities, EWE also makes its expertise in the construction and operation of offshore wind farms and substations available to international customers. "Deutsche Windtechnik has comprehensive experience in providing technical maintenance for wind turbines. This perfectly complements our own strengths, and the EU tender is enabling us to jointly and cost-effectively promote offshore wind energy north of Borkum. We would be willing to look into including further offshore wind farms north of Borkum in our service cooperation in the future," said Dirk Warnecke, Head of Asset Management Wind Offshore at EWE Offshore Service & Solutions GmbH.

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Illustration 1 Deutsche Windtechnik will begin providing turbine maintenance at the offshore wind farm Riffgat in June. © Photo credits EWE Offshore Service & Solutions GmbH

About EWE OSS EWE Offshore Service & Solutions GmbH (EWE OSS) provides consultation and active support for its customers with offshore wind farm projects, and the solutions it offers are based on the proven 360° experience of the EWE group. Planning, constructing and operating offshore wind turbines are complex tasks that require profound specialised knowledge and many years of experience. EWE OSS is a pioneer in the offshore industry at home and abroad. The company's current offshore projects include alpha ventus, Riffgat, Gemini and Trianel Windpark Borkum I & II.

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About Deutsche Windtechnik AG Bremen-based Deutsche Windtechnik AG offers a single-source full technical maintenance package for wind turbines in Europe, the USA and Taiwan. The company operates both onshore and offshore. More than 3,700 wind turbines are serviced by over 1,100 employees worldwide as part of permanent maintenance contracts (basic and full maintenance). Its system engineering focuses on /NEG Micon, Siemens/AN Bonus, , , Fuhrländer, Gamesa and turbines. More information about the Offshore unit of Deutsche Windtechnik at deutsche-windtechnik.com/offshore-service.

Deutsche Windtechnik AG Stephanitorsbollwerk 1, 28217 Bremen Telefon +49 421 691 05-0, Telefax +49 421 691 05-499 [email protected] deutsche-windtechnik.com