I'm not sure if you have a new or older coach but.....
If it is a newer coach and this is your first time out and it has the BIM160, the BIM could be wired incorrectly. As a result, the alternator won't charge the house batteries properly.
I had a similar issue with my 2020 Magnitude SV34 when it was new along with some other 12V electrical issues. Turns out I found my BIM to be wired incorrecrly from the factory.... and many other Omni / Magbnitude owners found the same thing.
I have posted about this many times. You can read these posts and it might help....
#56
https://www.thorforums.com/forums/sh...3&postcount=56
#58
https://www.thorforums.com/forums/sh...5&postcount=58
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