Indeed .
I suspect he's decided to give up and go get drunk
Hopefully he'll be back tommorrow and we can carry on with the online diagnosis
An alternator and voltage regulator can be working fine yet not put out enough volts to charge a battery .
The fact his is putting out enough on its lowest reading (2nd test = dropping) , and his battery DCv reading went up indicating a fuller charge , leads me to look at other things as I mentioned in my "best guess" post .
I had a read back earlier, and depending on the mA drain test results , the ignition switch is edging its way towards the number one on my list ....
(Radio fail)