Detailed Product Description wind energy turbine 1.CE proved+7 patents 2.high efficiency+small size 3.NO MOQ+wholesale price 4.professtional factory wind energy turbine Hummer 500w wind energy 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. The main technical datas of hummer 500w wind turbine windmill: Rated power(W) 500 Maximum output powerW 1000 Charging voltage (V) DC 24 Blade quantity 3 Blade material GRP Blade diameterm 2.7 Start-up wind speed (m/s) 3.0 Rated wind speed (m/s) 7.0 Rated rotating rate (r/min) 600 Wind energy utilizing ratio (Cp) 0.48 Generator output Single-phase frequency conversion AC Output AC frequency (Hz) 0~300 Rated charging current (A) 15 The maximum charging current (in a short time )(A) 25 Generator efficiency >0.78 Tower diameter(mm) 7620003 (3pcs) Tower height(m) 6 Generator weight (kg) 6.5 Battery 12V 150Ah/200Ah 2pcs