Wind turbine efficiency refers to how effectively a wind turbine converts the kinetic energy of wind into electrical energy. This efficiency is influenced by factors such as the design of the turbine, wind speed, and the area swept by the turbine blades. Typically, modern turbines can achieve efficiencies of around 35-45%, meaning they convert that percentage of wind energy into usable electricity. The maximum theoretical efficiency of a wind turbine is described by the Betz limit, which states that no turbine can capture more than 59.3% of the wind's kinetic energy. In practice, various losses occur due to mechanical and electrical factors, which is why actual efficiency rates are lower than this theoretical maximum.