Typically the battery disconnect switch is designed to disconnect the house batteries similar to pulling the negative cable off the battery so nothing can drain it when the unit is not in use or in storage.
Rv battery disconnect rocker switch.
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They break the connection between the battery and the 12 volt fuses providing power to lights appliances and so on.
This video walks you through how it works and the difference between.
By steve savage mobility rv service got a battery disconnect switch on your rv and wonder how to use it.
Thormotorcoach tmchowto we get a lot of questions about the battery disconnect switch.
To provide more specific troubleshooting information we need to know the make model and year of your rv.
Whether your switch is the manually thrown style or an automatic push button they all do the same job.