The Front CoverA growing number of wind turbines are operating in the second or third decade of their lifetime. As owner of 20-year-old Micon turbines in Germany the authors of the article on page 7 describe the possibilities and solutions for operating these wind turbines cost-effectively with the current low market prices for electricity supplied by wind turbines in Northern Europe. The picture on the cover is from the windfarm Lehe (Niedersachsen, Germany) where a TW 600a was replaced by Enercon E141. Publisher's NoteCOVID-19 and its impact on the wind energy Features
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