"Product Information Model: 500w H2.7-500w Wind turbine which features high efficiency and low rated wind speed introducing several patented technologies and some special materials. All of the wind generators are matched with wind-solar hybrid inverter controller, which can connect solar panel within 250w simultaneously. Please contact us for the detail The off-grid wind turbine is matched with 2pcs 12VDC batteries in series, and on-grid system can connect to state grid. Application Well used in: à Housing à Telecommunications Station à TV Transfer Station à Monitoring Station (military, hydrology, observatory) à Water-pumping Station Techinal Parameter Rated power(W) 500 Maximum output powerW 1000 Charging voltage (V) DC 24V Blade quantity 3 Blade material GRP(glass fiber reinforced plastic) Blade diameterm 2.7 Start-up wind speed (m/s) 3 Rated wind speed (m/s) 7 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) $76*3*2000 Tower height(m) 6 Generator weight (kg) 6.5 Battery 12V 150Ah/200Ah 2pcs "