I have a cHaring port/digital volt gauge I leave in dash when unit parked. IT tells me chassis battery status. Never see it below 12.4 or higher than 13.2. Gives indication of start battery status. Thor panel tells me status of house batteries.
I did mistake once of leaving unit unplugged for a few days wit store switch active. Grandsons watching dvd's on Axxera killed chassis batery. Recharged and has been fine.
__________________
|