A compressor fridge uses electricity to run a low-power compressor, which in turn pumps the refrigerant through the cooling system.
DC fridges use a dedicated 12V / 24V compressor which is designed to operate in a moving vehicle. Most compressors will operate on angles up to 30º. In general terms, a compressor fridge will also perform better in extremely hot and humid conditions. This combination makes compressor fridges the first choice for mobile use or off-grid situations where 12V power is readily available.