... wind turbine,more than 10% of the efficiency of ultra-GB,starting resistance,only be 1/3 of the GB ... wind turbine rotates at the speed of 2.0m/s and work at 2.5m/s.To install Mini 3 plus wind ... wind turbine,more than 10% of the efficiency of ultra-GB,starting resistance,only be 1/3 of the GB ... is made of aluminium alloy,very light and easy to install.The pole can be made thinner,saves cost!5.Maintenance ...