Calculating energy consumption: Next, let’s consider the environment you’ll be traveling in. If you’re going through hot outback areas, your fridge will consume more energy as the caravan heats up each day. Generally, fridges are rated to consume between 2-5 amps per hour, but this can vary depending on the temperature outside and how frequently you open and close the door. Keep in mind that a compressor fridge at home typically runs around 20-30% of the time. However, caravans have less insulation, so adding extra insulation around the fridge’s internal cabinetry can reduce the need for it to cycle as often. Since fridges run continuously, I suggest assuming an average of 3 amps per hour, and to be safe, calculate with a 50% cycling factor. This gives you a total of 36 amp-hours (3Ahr x 24hr x 50%).