Originally Posted by Technorick
My batteries stay in the coach all winter. Stored outside the garage. The MH stays plugged in and the on board charger converter keeps them up.
To keep the chassis battery lively I start the MH every ten days and run it.
I installed a battery tender mini quick disconnect to the chassis battery last year while installing my LED driving lights and never connected it to the charger. I recently disconnected the charger from the motorcycle and connected it to the chassis and discovered that my chassis battery was not fully charged. So now I keep the battery tender for the chassis connected too.
One of these days it would be nice to figure out where Forest River stands on letting the BCC charge the chassis battery when shore power is connected. On my old Fleetwood the BCC would parallel up the chassis battery when the battery voltage went about 13 volts or so.
From looking at other data on this forum it appears that Georgetown also uses the same vendor as Fleetwood did and normally any charge source will find its way to all batteries (apparently with the exception of the MB Sprinter chassis.) As long at the main disconnect switch is on (batteries connected) the converter will charge the chassis and the house, as will the alternator charge the chassis and the house. If you have solar connected to the house bank and your disconnect is on, you will also keep the chassis topped off.
It seems that 15 seconds after the first charged bank goes over 13.2 volts, the banks will be paralleled. It the voltage drops below 12.7, the parallel connection will be severed.