maglev vertical axis wind turbine start up wind speed only need 1m/s , maglev technology using lead to high efficiency . 300w is suitable for wind solar hybrid street light , 600w 1kw 2kw 3kw widely used in house , many people like to install some piece of 600w 48v vertical maglev wind turbine on theirs roof (like the video) to provide power , bacause the weight for 600w 48v just 52kg.