A vehicle that includes a frame, a prime mover, an alternator, a cabin, a HVAC system, and a power source. The prime mover is operable in a first mode that is configured for driving the vehicle and a second mode that is configured for standby operation of the vehicle. The cabin includes walls that define a space and that have insulation to insulate the space. The HVAC system is in communication with the cabin to condition the space, and includes a cooling system, a heating system, and a sorption system that dehumidifies air provided to the space. The power source has a battery that is in electrical communication with the alternator and the HVAC system to supply power to the HVAC system from the battery when the prime mover is in the first mode and when the prime mover is in the second mode.