Originally Posted by greenflag
I would take them home. Put them on as low charge with an automatic charger.
When charged take them back to storage lot. Do not hook up your negative cable. Your solar charger should keep them up to snuff after that.
The stock solar charger won't work if your batteries are not fully connected. Airstream uses the internal bus bars as the connection point and without the battery cables secured, no current will flow to them.
If using a free-standing solar charger like the BatteryMinder system…….no problem!