I know nowt about your system so these are wild guesses.
The switch on the left, is it in the correct position?
when you say sockets, do you mean the 3 pin mains 240v sockets.
this shows power gets to the caravan if they are working. your fridge, is that working from the 240v or is it working from 12v?
with the electric hook up connected and turned on what voltage do you get across the battery?
with the electric hook up disconnected what voltage do you get across the battery?
macafee2
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