Powered trailer systems

A powered trailer door operating system for use with a trailer door of a trailer, comprising:

• a guide track having a lower guide track portion configured to position the trailer door at a closed position and an upper guide track portion configured to position the trailer door at an open position;
• a drive support coupled to the upper guide track portion, the drive support having a central cavity and a slot extending through the drive support into the central cavity, the slot positioned longitudinally along at least a portion of the drive support;
• a drive shaft positioned within the central cavity;
• a carriage slidingly coupled to the drive support and operably coupled to the trailer door, wherein the carriage is operably engaged with the drive shaft through the slot;
• a motor operably coupled to the drive shaft;
• a first trailer contact feature positioned on a first portion of an exterior surface of the trailer and operably connected to the motor;
• and
• a second trailer contact feature positioned on a second portion of the exterior surface of the trailer, wherein the first and second portions are spaced apart from each other and positioned on an aft portion of the trailer, wherein the first trailer contact feature is configured to automatically contact and electrically couple to a first station contact feature as the trailer backs up to a loading dock and the second trailer contact feature is configured to contact a second station contact feature, whereby the first and second trailer contact features collectively receive electrical power to drive the motor from an external power source via contact with the first and second station contact features, and whereby the motor rotates the drive shaft to cause the carriage to translate along the drive support, thereby moving the trailer door between the closed position and the open position.