We have solved the riddle of the dodgy battery charger at last. Well I say dodgy battery charger, but it is actually a dodgy wire or connection from the charger to the batteries.
Last night Liam connected the charger directly to the batteries and hey presto, it works a treat.
So right now the batteries are happily charging away and when we get back to the marina on Sunday morning we will renew the connections and wiring and hopefully have everything up and running again as it should be.
We just have a spare battery charger now!