mikemc53 wrote:
I will be able to get to it every couple of weeks to run it and keep the chassis batteries going but not sure of what is best for the house batteries?
Once a month is plenty. Be sure to run it long enough to get the temp gauge up to where it normally runs.
And I think you will find that the house batteries charge when the engine runs too.
IF....you have access to shore power, it is best to get a couple of smart battery maintainers (tenders) NOT TRICKLE CHARGERS, hook one to each battery and leave it alone. Yes, do NOT start it; not necessary.
Letting your built-in charger/converter handle the task long term is not a good idea in general because many will "float" the batteries too high for long term storage.