Detailed Product Description wind power turbine 1. CE proved+7 patents 2. High efficiency+small size 3. NO MOQ+wholesale price 4. Professional factory Hummer 20kw wind power turbine output single-phase frequency conversin AC, It has the features of high power efficiency ; low start-up wind speed at 3m/s ; reliable protection of over current /temperature/loading /short circuit etc ; long life design. 20kw wind power turbine can drive air-condition ( 20 horsepower), pump or other electrical appliances (20KW). Well used in: Housing Telecommunication Station TV Transfer Station Monitoring Station (military, hydrology, observatory) Water-pumping Station Main technical parameter Rated power(W) 20000 Maximum output power(W) 28000 Charging voltage (V) DC 240 Blade quantity 3 Rotor blade material GRP Rotor blade diameter (ft. ) 30 (9.0m) Start-up wind speed (mph) 7 (3.0m/s) Rated wind speed (mph) 26 (11.5m/s) Rated rotating rate (r/min) 180 Wind energy utilizing ratio (Cp) 0.40 Generator output Frequency conversion AC Rated charging current (A) 83.3 The maximum charging current (in a short time) (A) 120 Output AC frequency (Hz) 0~320 Generator efficiency > 0.87 Free standing tower diameter (in. ) ? 41.3*? 29.5 (1050*750mm) (2 segment) Tower height (ft. ) 52 (16m) The weight of generator(lb) 1093 (496kg) Suggested Battery (Ah) 800/1000