"The launch of the prototype took place according to schedule," says Enercon managing director Nicole Fritsch-Nehring.

The company installed a 4.2MW version of its E-126 EP4 series in Lelystad in the Netherlands for wind class IIA WEC conditions, which is a forerunner for its E-141 EP4 low-wind model to be launched at the end of this year.

Except for its longer rotor blades, the components of the E-141 EP4 are almost identical to the E-126 EP4, the company said.