In the automotive industry, and especially in the heavy-duty sector, one of the main problems is the one of energy balance. This topic includes three main elements: the alternator, the battery, and the loads; the alternator should charge the battery and supply the loads when the vehicle is moving, while the battery provides the necessary current to the loads when the alternator is not working. Considering a daily truck mission, the night zone represents one of the most critical periods of the mission because the driver utilizes different loads during the night, especially the parking cooler, which absorbs a lot of energy.