Charger Wind Turbine Generator Pacific Sky Power - DIY Free Portable Energy Made with high strength materials and specialty components. Easy to Install, Educational, Portable, & Safe Efficient wind turbine for DIY projects. Charge batteries and power LED lights directly. Build new inventions, kinetic art installations, and home wind power systems. Technical Specifications Startup wind speed: 8 mph Survival wind speed: 50 mph Rotor type: Horizontal axis Rotor diameter: 15 Generator type: Brushed 30 volt DC motor Battery charging: 12 volt DC Charging rpm: 500 to 2000 rpm Weight: 1 lb Power cable length: 8 ft