... certified (2)Low wind speed model,has electric brake (3)Overcharging protection, stable output voltage It build in MPPT charge controller Parameter ... ,Easy to start up .it is a ral top-gradeblade.2.bodyA whole Die casting aluminum ,Not screw by some nut ... N32 .5,ControllerOulu have a MPPT controller buit-in the body .It is a full Intelligent controller,Voltage rise,auto brake,autounloading,12 ...