AMSC has been pursuing Sinovel since 2011 for alleged intellectual property theft, trade infringement and breach of contract in a $1.2bn action centering on power-electronics software code - part of the electrical control system used in wind turbines - plus payment for contracted deliveries.

“Those conversations continue. The litigation in the Chinese courts has taken longer than probably even the government of China has wanted it to take,” McGahn said on a recent conference call.