The 12V switch will cut off your house batteries from being discharge while in winter storage.
The small red light will go off when disconnect switch is operated.
If you have the coach shore power hooked up leave switch on with the small red light lit and both house and chassis batteries will be charged by your
BIRD System.
Top rocker switch reads voltage of your house batteries.
There is also a LP detector switch in my display panel that will cut it off so it will not discharge the chassis battery.