Drag vs. Lift TurbinesAnatomy of a Wind TurbineRotorAlternator (Generator)Gearbox (Optional)TailYaw SystemSlip RingsTowerVertical Axis Wind TurbinesA Typical VAWT PitchBrief History of VAWTsPurported Benefits (and Disadvantages) of VAWTsConvenienceEnergy Output and Efficiency of VAWTSReliability and FatigueWind Speed, Direction, and TurbulenceCostSound, Vibrations, and FlickerEffects on Birds and BatsAestheticsWePOWER Shows MomentumQuietrevolution’s High-Tech VAWTsFrom Jellyfish to Helixes: Alternative VAWTsVAWT vs. HAWT: The Final ConclusionStandards and CertificationsIndependent CertificationSummary