I am wondering if there could be some type of Fuse or Relay that would cause the Alternator to stop charging.

I just replaced the Battery and had my Alternator Rebuilt 2 months ago. Could I have a bad rebuild?

I put a voltmeter to the battery posts and got 12.0 - 12.1 with car off. Car on I get 11.6 - 11.8

Seems like Alternator is not working. I blipped the accelerator a couple time and the Battery light Blinks a couple times then Battery Light stays on steady.

Any thoughts or suggestions before yanking the Alternator to bring it back to the Shop that rebuilt it?