... in MPPT charge controller Parameter Rotor Diameter1.2m Weight8KGShipping Dimensions690*470*200mmStart-up wind speed2m/sRated wind speed12m/sOutput voltage12V/24V auto.distingguishRated ... rise,auto brake,autounloading,12/24V auto distinguish,auto week up and so on ,It will protectthe generator and will have a good charge current ...