If you have a smart charger on board, it will safely charge the house batteries while in storage. If you don't have a smart charger, use the disconnect switch to isolate the house batteries and connect a smart trickle charger. The chassis batteries will not be charged from shore power on most coaches. Use the battery disconnect switch to isolate the chassis batteries and use a smart trickle charger to keep them charges.
2016 Winnebago Journey 40R - 2012 Jeep Rubicon
2 Arctic Cats, 3 Shelties, 4 cats
Bottle of Jack Daniels & wife