07 Flickering Battery Light

[egf265]

I have searched through all the forums and need a little more insight into my flickering battery light issue.

My battery light came on a week ago and had to replace the alternator with a reman one from carquest. I replaced the serpentine belt a few months ago and battery was replaced 11 months ago. Now the battery light flickers when I've been driving for about 20 minutes or so but never stays on solid. Yesterday for the first time the AC wouldn't run cool until about 5-10 minutes after driving.
I have checked the ALT-S fuse and it is good, also checked the voltage regulator and the battery with a multimeter and they were good; the battery and alternator cables do not appear corroded and I cleaned the battery cables for extra measure. I don't think the weather has anything to do with it, it has only rained once since that happened.

Any help would be greatly appreciated, I would love to avoid having to take it to the dealership.
Thanks!