Hi we have an elddis wisp which im guessing is a middle 80's till late 80's van, Now the problem i have is everyone keeps saying it should have a zig charger in it to charge the battery while plugged into 240 volts so the battery should stay fully charged but i dont think it has. It has the normal control panel which has got bout 3 switches on it, one is for the water pump, one is for the lights and i cant really remember wot the other one is for and it also has the one that switches it from caravan to car battery. Now what i wanna know is has anyone got the same sort of van and if so do you know if these have got the built in charger on them please, thanks