Hi all. When my Adria Adora 612UP caravan was serviced recently, the engineer pointed out that the 12v system is permanently live when the battery is connected. There is a small panel with a meter and two rocker switches marked "VOLTS" and "PUMP" near the sink, but even if the "VOLTS" switch is set to off and the meter needle returns to zero, I can still turn on the ceiling lights and other 12v stuff. I've looked everywhere but can't find a 12v isolator switch like I've had before on other models of caravan. My concern is that if the 12v circuits remain live when the caravan is not in use between trips in the summer (I remove the battery altogether over winter) the battery will drain slowly. I would prefer to have a switch to turn everything 12v off when the van is parked up on my driveway between trips. Should I be concerned?