We have a 2018 big horn traveler 5th wheel and we keep her plugged into shore power when we get home from a trip, but have noticed that the slides don’t want to extend after sitting a couple of weeks, we’ve had to plug her into the truck to get her to operate. Our two batteries are on in the cargo, are we draining them while just being plugged into shore power? Could use some help figuring this one out, thanks in advance!