The TPW Series Wind Turbines from Tycon Power Systems are lightweight at less than 10.5kg and are designed for ease of installation and long service life. The generator is a very low cogging force design for better performance in light winds and is packaged in a fully sealed die cast aluminum enclosure. There are no brushes to wear out or cause electrical noise and the bearings are sealed so the system is maintenance free. The blades are glass reinforced nylon for high strength UV resistance and fatigue resistance. The turbines are 12V/24V auto voltage select. The unit includes an embedded smart battery charge controller and dump load resistor. The dump load helps prevent premature braking and increases the total power delivered to the batteries. It also helps protect the turbine in high winds. The entire blade assembly can be removed easily as 1 piece for hurricane protection. This also makes it easier and safer to install.Features Integrated controller with dump load to optimize performance Wind turbine startup wind speed of 2.1m/s (4.7mph) Smooth and quiet running maintenance free sealed turbine Sealed die cast aluminum housing for protection from harsh environments Very light and compact Easy installation and maintenance free operation Electronic over-speed protection Charges batteries from flatSpecifications Startup Wind Speed - 2.1m/s (4.5mph) Power Rating - 300W @ 12.5m/s Max Power Output - 400W Turbine Voltage Output - 12V or 24V Auto Select Battery Voltage Rotor Diameter - 1.12m Blade Material - Glass reinforced nylon Body - Die Cast Aluminum Weatherproofing - IP65 and Salt Mist Corrosion Protected Over-speed Protection - Electronic Survival Wind Speed - 50m/s (112mph) Operating Temperature - 40C to +60C - SKU: TYCN065