I probably will install a cut off switch*, no dealer needed though as I have always done higher quality work on my RVs than any dealer and cheaper as my labor is free

I typically run Battery Tender brand maintainers when stored instead of depending on the WFCO convertor/chargers installed in the pod.
A couple of reasons for this-
1st> the Battery Tender uses far less electricity running 24 hours a day than the WFCO.
2nd> the WFCO convertors have a very bad reputation for failing, already had that experience in another RV. A failed WFCO can leave your expensive batteries in either a state of undercharge or worse, cook them from an overcharge when left long term.
3rd> IF the Battery Tender was to fail it is small enough to not overcharge most batteries. I run two Group 31 AGM batteries, so long life is important as that is almost $400 worth of batteries!
* I usually use a 50 amp commercial rated DC circuit breaker which is also used as the cutoff switch, rather than just a switch.