This Sunforce wind generator turbine is small yet versatile turbine and can produce up to 600 Watts. It automatically adjusts for 12V or 24V applications, making it ideal for backup and off-grid power. The turbine begins to supply power in wind speeds as low as 4 MPH and includes overspeed protection at 1400 RPM. It also includes an MPPT charge controller that maximizes power output for optimal charging capability and battery health. Product Style Land/marine, Dimensions L x W x H in. 27 1/2 x 26 3/4 x 10, Watts 600 max., Assembly Required Yes, Overspeed/Overcrank Shutdown 1,400 RPM, Material Type Aluminum alloy, Weather Resistant Yes, Volts 12V or 24V applications, Speed MPH 4 mph start up, Blade Diameter in. 52, Rotor Size ft. 4.3, Blade Material Nylon/glass fiber, Mount Type Tower mount. Create your own power both day and night with the power of the wind Unit will charge 12 or 24 volt batteries to run your appliances or electronics Automatically adjusts for 12V or 24V applications Safe and efficient charging with included Maximum Power Point Tracking Charge Controller Includes manual brake Features state-of-the-art MPPT software DIY installation - no need for professional installer Complete guyed tower kit sold separately Item# 121072 Durable aluminum alloy construction Weatherproof industrial strength design for years of service Aerodynamic fiberglass blades ensure low wind noise 52in. blade diameter Model Number: 45444. Size: Small. Age Group: Adult.