The move is the latest salvo in a growing offensive by US-based wind and solar industry component manufacturers against China over alleged trade-distorting policies and practices in clean-energy sectors.
In the run up to November 2012 US national elections, China is under fire for pursuing what politicians claim are mercantilist policies. China is the second-largest US trading partner after Canada.
"The Chinese and Vietnamese industries are using unfair pricing practices to capture critical sales from the US industry.
