the apparatus operates roll up doors used on commercial vehicles by employing dual powered opener / closer motors . the motors are mounted along the door tracks and there is no motor unit that must be mounted in the cargo space of the truck in the matter of a garage door opener the current invention is more suited for commercial vehicle use . the motors are synchronized in order to avoid having the door jam , or otherwise damaging the door , due to one side of the door raising or lowering more quickly than the other . the motors may have integrated rechargeable batteries so that the motors and door move along the tracks with wires .