A power distribution assembly includes a mounting system and a power distribution unit. The mounting system has a frame rail interface disposed along lateral sides of the power distribution assembly. The power distribution unit has a housing and a cable junction disposed on an exterior of the housing. The housing has an upper portion coupled with the frame rail interface and a lower portion disposed below the mounting system. The power distribution unit has one or more fuses, a contactor, and a charge circuit disposed in the housing. The lower portion of the housing has an access panel accessible from beneath a vehicle to which the power distribution assembly is coupled. Such access may be gained by removing a debris deflector and the housing. The power distribution assembly can be electrically coupled with a battery assembly and a charge inlet assembly, which can be coupled to the battery assembly.