I leave my Berk plugged in in its bldg.... I know my inverter/charger should maintain all batteries BUT once all are fully charged and is in float mode, does it safely maintain them...
The 3 stage converters being used now won't overcharge the batteries...my camper has been plugged in at home year round for the last 3 1/2 years. I just check water level in the battery twice a year and very little if any is required to top up.