(Grevenbroich, 4 June 2018) It was twenty years ago, on 1 June 1998, that windtest grevenbroich gmbh (wtg) put the Dewind D4 prototype into operation on its test field south of Grevenbroich. Today, wtg looks back on a 20-year history of its wind turbine test field.

TÃœV Rheinland has provided a prototype certificate to Directtech, an energy systems manufacturer based in Moers.

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