[Wisconsin Retiree]

If needed, I am also able to turn off dedicated A/C breaker, confirm 12V kill switch is disconnected and my fridge will be completely off without having to unplug it.

As for traveling, then parking for a night in a rest area. I have sat for in excess of 12 hours while just on batteries and my residential fridge will maintain temp in fridge and freezer on batteries alone without depleting the 2 batteries beyond much less than 11.8 to 12.0...start up truck and continue to travel on. I have thermometers monitoring internal temps inside fridge and freezer. In reality the compressor doesn't run all the time. You need to be cognizant of wisely opening & closing the unit when running on batteries to assist in easy recovery.