We camp (in an old Khyam XXL) as a family with a peltier-cooled fridge, strip light, battery charger, phone chargers, etc. When travelling using a car, the cooler (which achieves fridge temps even in France in summer - at least 35°C in the tent) is a boon.We have a 3-gang socket with RCD, but also have to carry a blue socket to French domestic 3-pin adaptor as some French sites do not have the IP44 (or whatever) sockets. Never had a problem with this though.
