As pointed out on your Facebook post and numerous discussions here (a Search would have answered the question) the battery disconnect does *NOT* disconnect all 12V draws. There are parasitic demands by the Propane Detector, CO Detector, and the front jacks/leveling system which will suck a single battery (or even two) in a short time.
The solution is to either install a true battery disconnect at the battery *OR* simply disconnect the battery ground cable.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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