We're using the fridge in our workshop, powering it with our DC camping battery - an upgrade from a powered coolbox. The compressor makes a huge difference! It's really fast to chill and once it's down to temperature, it stays cold! The compressor only has to kick on intermittently so it's really efficient and uses barely any power. Around 50w while the compressor is on and then 0. Much better than it's predecessor which constantly pulled power and really struggled to maintain a low temperature. The battery protection is a very nice touch and takes the stress out of using your vehicle battery as a power source. Highly recommend :)