It's mainly house. I think previous owners have 'modified' and now we don't seem to be getting any charge going into our leisure battery.
The 2 for the chassis are ok!
The house batteries can be charged from shore power or from the engine alternator. Is yours failing to charge from either source or just one. Charge voltage should read 13 volts or a little higher. Have you checked to ensure that the batteries are serviceable? How many batteries are we talking about and are they 6 volt or 12 volt?