Cab battery is 13.5 and Hab is 13.9. I have just turned off the electricity supply to the van so will keep my eye on itdon't know if fun time Frankie has a battery master.
Gina.
As you know, one should leave the batteries off charge for, at least, a couple of hours until they have cooled down, to get a reliable reading. As you say, keep an eye on it.