*2 on the camper battery lights.
On the Zamp display, while the voltage displayed is the voltage on the battery, it may be showing the voltage supplied by the alternator, or the voltage supplied by the Iota converter, or the voltage supplied by the Zamp if solar charging is happening. Or, lastly, it may be showing the battery voltage that the battery is supplying to whatever load it has.
The voltage table in rando’s post expects the battery to be a resting voltage. The resting voltage is accurate several hours after all loads have been removed and charging has stopped from all charging sources.
Practically, this means sometime after dark and if the fridge hasn’t run for a long time.
This is why you’re getting so many recommendations to get a battery monitor that measures charging and usage with a shunt to know current flow over time.
Hang in there & keep asking good questions. It all becomes clearer after a while. This stuff is easy. Knowing all the bones & what they do is hard. Not to mention why you shouldn’t eat grapefruit with some medications or why you should not drink milk with your tetracycline.
Paul