The three aerofoil blades are managed by an advanced passive pitch control system that allows the e400i to continuously generate rated energy in wind speeds that exceed rated wind speed. The three blade design, with a diameter of 4m, moderates noise emissions effectively, making it an unobtrusive and reliable method of renewable energy generation in all installations and environments. The e400i advanced direct drive alternator incorporates three main shaft bearings for longevity and increased reliability.