to be specific
the converter or charger with generator is good for a weekend or maybe a week
then take the RV home and plug in to power and let the converter slowly bring the battery back to full topped up charge
if the RV is going to be stored with NO shore power, the battery will not be full
and every such trip slowly reduces the batteries total capacity, because it is never fully recharged, Solar on the roof cures this problem
it keeps working after you turn the generator off
it works while the RV is stored, even for months with no shore power
during the week while you are working it makes sure the battery gets fully topped off and ready to go
of course all off this, is only relevant to keeping a good battery good
and nothing to do with the meter or the possible bad battery
