New Alternator - Battery Light Still Flickering

[Woody86]

I found a lot of similar situations as this online but none of them had any posted resolutions. Documenting what happens for me in hopes of helping someone else in the future.

Just installed a new alternator and had a good two days of driving. Suddenly this afternoon just after starting the lights surged a bit and the battery light came back on. Checking the OBD the readout was back to the same as it was before the replacement.

Stats:

New Bosch Alternator installed 2 days ago.
OBD Readout: 10.6v - 11.9v
Multimeter @ Battery Engine Off: 12.28v
Multimeter @ Battery Engine Idle: 14v

Nobody around town is open for an AVR tonight. Hoping the alternator isn't already shot...

Update (11/28): After poking around with the multimeter a bit more started it up to test the battery at idle again. OBC was reading 13v steady! Took it for a drive and after around 2min it went back to the 11v range again.

Update 2 (11/29): I can't get in anywhere until Monday but the consensus of everyone I spoke to is that if the battery reads 14v at idle (regardless of amps) the alternator is not likely at fault and if the battery didn't lose charge overnight it likely isn't the battery either. Everyone thinks we're looking for a bad ground somewhere as others have alluded to in this thread. Guess I know what I'm doing this weekend. Will be taking it in Monday regardless to have everything load tested.