What does a 12 volt battery disconnect switch on an RV do?

by Dieter
(Lompoc, CA, USA)

How does the 12 volt battery disconnect work? I have lost 12 volt power on our 2006 Four Winds Hurricane.

ANSWER: Greetings Dieter thanks for submitting your question on our Ask An RV Question Page.

A 12 volt battery disconnect switch is used to shut off all 12 volt power in the RV. When the switch is activated the batteries are disconnected/isolated and no longer supply 12 volt power to the house portion of the RV.

A Factory Installed Battery Disconnect Switch is usually a rocker switch that is located in the RV marked as "Battery" or "Battery Disconnect" or any abbreviation of those words. There are also Aftermarket Battery Disconnect Switches that can be installed directly on the house batteries.

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If you find out that your problem is not caused by an activated Battery Disconnect Switch it could be that your house batteries are no longer holding a charge or no longer being charged or even a blown fuse. The problem could also be caused by low electrolytes in the batteries or loose connections on the batteries.

I hope this helped.

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