How Efficient is Wind Power Help Save NatureHow Efficient is Wind Energy in terms of Productivity Back in 1919 Albert Betz a German physicist revealed that the maximum possible output for wind turbines is 59 percent In what is referred to as the Betz s law he states that the maximum possible energy that can be derived from a hydraulic wind engine or a wind turbine is 16/27 59 percent of the total kinetic energy of wind How