In 2001, Dehlsen and his son established Clipper Windpower and in partnership with the U.S. Department of Energy, developed the 2.5-MW Liberty Wind Turbine, featuring advanced drive train and controls architecture. As of 2011, more than 475 Liberty turbines (1180 MW) are operating in 18 projects across the U.S. and Mexico.
Recognition for Dehlsen’s wind industry work includes the "Lifetime Achievement Award" from the American Wind Energy Association; induction into the Environmental Hall of Fame; and the "Danish Medal of Honor" conferred by Prince Henrik of Denmark. In 2008, Dehlsen was inducted into the National Environmental Hall of Fame as the "Father of Wind Energy in the U.S." In 2011, Dehlsen received an "Excellence in Renewable Energy Award" from the magazine Renewable Energy World.
- Clipper Chairman inducted into Environmental Hall of Fame North American Windpower, 12 December 2008. Retrieved: 23 October 2010.
- Enron acquires Zond, a major wind-power company New York Times, 7 January 1997. Retrieved: 6 November 2010.
- "2011 Excellence in Renewable Energy Awards – Leadership". Renewable Energy World. 11 March 2011.