I had the same problem 1st week I had Vegas home.
Turned out that I used store switch and it would not keep chassis battery topped off. I have since learned to never use store switch. If RV sits and is not connected, I pull chassis battery terminal and eliminate issue. My RV sits next to pool and is usually plugged into at least a 20 amp circuit. I keep a digital display to keep an eye on voltage.
My power draws were Axxera front stereo/DVD that grandchildren were using. Is off chassis battery. I did not know that and have since learned.
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