METHODS AND SYSTEMS FOR A TRACTOR AND A TRAILER

Methods and systems are provided for a coupling device for a tractor and a trailer. In one example, a system, comprising a tractor comprising an engine, a motor, and an electrical energy storage device, a trailer comprising a battery bank and a power distribution unit, and a coupling configured to fixedly couple the trailer to the tractor and to electrically couple the power distribution unit to the electrical energy storage device.