Battery low when electric connected

dct1970
dct1970 Forum Participant Posts: 1
edited August 2015 in Caravans #1

So sorry to trouble people but wonder if someone may be able to help - rather stuck on a French site connected to their electric, but have a battery low warning ( DC volts kept lowering until less than 9v, completely drained now). Fridge / pump / alarm all
not working. Tested the red breaker which works so electric coming in - can use microwave/ kettle / TV etc?

i checked the battery connections 

i have a Lunar Delta FB 2011 caravan.

any ideas as I'm not very clued up on electrics?