Over the past three years, the U.S. wind industry has enjoyed a relatively stable policy environment. The federal production tax credit (PTC), the primary economic driver for wind, has been in place without interruption since August 2005 -- after being extended for two years in the energy policy act of 2005, and extended for one additional year (through 2008) at the end of 2006. In addition, more than 10 additional state renewable energy standard (RES) programs have been put into place, bringing the total number of states with an RES to 26 plus the District of Columbia. During that time, total wind capacity grew by 150% and the annual market size more than doubled.

U.S. manufacturers previously unfamiliar with renewables are finding a demand for their existing output (e.g., bearings) in the wind industry while other companies are tweaking their products and retooling their facilities to serve the wind industry and take advantage of this growing market.