Hook up not charging leisure batteries.

[Jukebox70]

The display reads 0% battery 14.2v with Hook up plugged in. Any ideas why they're not charging? Just had a long drive back from Spain, van was left standing for a couple of months during lock down in Spain.

 

[TripleBee]

So the display shows 14,2V, but shows 0%? And without the hookup?

Is your breaker switch on in the back?
What do you measure with a multimeter over each battery?
Did it work before, and when did you notice a problem?
Do the batteries charge while engine running?
Bluemotion Technology?

Some more info to help you out would be welcome.