The American Wind Energy Association claims there was more than 12GW of wind capacity under construction at the end of 2013, with nearly 11GW of that entering construction in the final quarter of the year alone.

The “worst-case scenario” of a 50% attrition rate on that figure is unlikely, but “I’d bet you’ll see at least a 30% fall out”, says Duncan Koerbel, the Denver-based chief technology officer for India’s Suzlon Group.

Koerbel