Originally Posted by bikendan
You should never leave a trailer(with battery)stored without it being plugged into shore power or use a battery disconnect switch.
If you don't have one, you need to install one.
I left mine stored, without shore power, for 4 months.
Because I have a disconnect switch, the batteries were still nearly fully charged when I picked it up.
I guess I will have to install a disconnect after my battery. As far as I know, everything is off inside the TT but I've noticed that the battery is dead within about 3 days when I have it in storage. I take it out during winter storage and put it on a tender but leave it on the TT between trips, unfortunately only about one long weekend a month.