IN DEPTH | Clarity over PTC rules and the returns on offer to investors mean 2017 is the year wind repowering takes off in the US, writes Karl-Erik Stromsta
The San Gorgonio Pass wind farm is among the oldest in the US. Pic: Ian D. Keating/Flickr
Karl-Erik Stromsta in New York
Published 9 June 2017, 14:17Updated 9 June 2017, 14:17
