Another trick I use is using the Cooler blocks and bags you can buy at Walmart for inside my cooler/fridge. I know my thermoelectric is not near what the ARB is, But along with using the Blocks after packing food, we can keep things nice and cold for a weekend. The blocks come in handy when we stop and I turn off the cooler. I am thinking once I add the dual battery in my rigs, I can leave it running in the daytime and just unplug overnight. Ice packs well keep cold over night.