A heavy-duty vehicle accessory assembly includes a vehicle accessory having an input shaft; an electric accessory motor having an output shaft, the electric accessory motor configured to supply power to the vehicle accessory; and a mechanical coupling configured to couple the electric accessory motor with the vehicle accessory, the mechanical coupling including a first pulley affixed to the output shaft of the electric accessory motor, a second pulley affixed to the input shaft of the vehicle accessory, and one or more belts that mechanically couple the first pulley with the second pulley.