![]() ![]() Once you do that you disconnect the battery from the power supply that will recharge it or them. When you need to charge your batteries you should not turn the switch to off. You do not need to run your battery at this time. When you are plugged into shore power, the disconnect switch should be turned on so that the appliances, etc., will receive power directly from your off RV connection. Just so you know, the many module boards operating your appliances also depend on battery power. When turned on it will break the power supply between the battery and almost all 12-volt operated devices like lights, appliances, and so on. The battery disconnect switch has one task only. What Does The Battery Disconnect Switch do on an RV? This will stop parasitic devices from draining your battery of power while in storage. If you really want to be safe when storing your RV or trailer, then simply disconnect the battery cables and remove the battery. Then if you want to charge your battery while traveling, then you should have the switch turned on. Those same people say that the switch should be set to off when you are storing your RV or connected to the shore power. Some people think that it should be on when you are moving from one location to another. Thus you have to make sure how your wiring is set up before installing the switch or using one that was already installed. The switch will not stop any power draw when the devices or systems are directly wired to the battery. It will stop the battery from losing power to all those devices that still draw power even when off. The battery disconnect switch will be helpful in most cases. This will depend on how your RV or trailer is wired.
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