Absorption or 3-way caravan fridges are a popular type of refrigerator used in caravans, motorhomes, and other recreational vehicles. They are called “3-way” because they can be powered by three different energy sources: 12-volt DC battery power, 240-volt AC mains power, and propane gas.
Absorption fridges work by using heat to drive the cooling process, rather than using a compressor like a traditional fridge.