Talking about high-efficiency systems like this it's a given that we're testing for the best-case scenarios. But you do make a really good point. In cruising,

Talking about high-efficiency systems like this it's a given that we're testing for the best-case scenarios. But you do make a really good point. In cruising, people who choose to have a fridge have systems for this. It is usually to get saltwater really really cold or frozen in some kind of containers: it is popular to use PVC pipe, capped off of course, filled with seawater (or a mix of fresh and sea). You store your food in the freezer and charge up these pipes, cycling them on to the top of your food in your cooler (not powered) once every 3-4 days. This: "1 kilowatt of solar panels has managed to cool the fridge down close to standard fridge temperatures." Is kind of silly to me though... because that's an "incredible" amount of power.