debud - actually not knowing when dry camping leaves you in the dark around 10PM in my experiences usually haha...
One thing I would really like to have my BATTERY MONITOR PANEL which is just meters to do is give me an audible alarm that goes off when the batteries get down to their approximate 50% charge state.
The good smart alarms will have this feature... At least the TRIMETRIC RV-TM2025 one does... The one drawback I might have with the TRIMETRIC is monitoring multiple battery banks at the same time.
I was going to add an VOLTMINDER to my monitoring setup to give me the settable audible alarms and the company went off line for a few months to redesign a new meter. It is now in prototype status and will be in production soon they tell me.

I think the new one will look something like this
Roy Ken