ENERCON has successfully commissioned its first E-141 EP4. The prototype of the new low wind speed WEC (wind class III) was installed according to plan on a hybrid tower with a hub height of 129 m in Coppanz, Thuringia. Now the WEC has fed its fi rst kilowatt hours into the grid.

The E-141 EP4 is based on ENERCON’s new 4 MW platform that also forms the basis of the new E-126 EP4 for medium wind speed sites (wind class IIa). Both EP4 types have a nominal power output of 4.2 MW.

With its rotor diameter of 141 m the E-141 EP4 currently has the longest rotor blade to be found on the onshore market. At sites where wind speeds average 6.5 metres per second it will generate annual yields of more than 13 million kilowatt hours. This means that it is the world’s highest-yielding wind class III WEC at present.

“Commissioning of the first E-141 EP4 was the perfect fi nish of our initial EP4 market launch stage,” says EP4 programme director Arno Hildebrand. “We managed to commission three prototypes in just nine months – two E-126 EP4 and one E-141 EP4.”

ENERCON is right on track also for the next stages: Presently, other E-141 EP4 prototypes are being installed in Lower Saxony for the certifi cation measurement campaign. Series production of both the E-126 EP4 and the E-141 EP4 is going to start as early as the beginning of 2017.ENERCON is planning to install about 150 serially produced EP4 WECs in 2017; about 80 of these will be E-141 EP4.

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