Alternator wont charge

[K-Line]

I posted this in the m20 section to but i think it belongs here. So today I drove my 325e for the first time in the rain, i have driven the car many times since i finished it (with a brand new battery) in the dry with no problems. But today it rained quite heavily, drove the car to a friends, then when i went to go home the car sounded like it was a little hard to crank but it started and i drove it back. Although i did notice it kinda hickup once. Parked it and then went to drive it again probably and hour later and the car had some juice but not nearly enough to start. jumped it and stated to drive but by the time i went 200ft the lights were dimmed to the point that they where almost off and the car would barely run (not enough juice to run the fuel pump). Eventually it died completely, i know it has something to do with the alternator/charging system but i dont know what! I checked to make sure the battery light wasnt blown which its not, everything looks fine nothing out of the ordinary! I dont know if the rain could have shorted anything or couldve ruined the voltage regulator? Im gonna try jumping it again tomorrow when its dried out. So pleaseeeeeee any ideas or better yet answers would be appreciated!

Thanks, GK

[efficient]

ive changed the voltage regulator before on my alternator and i thought i fixed it, nope i took it out and tested it and the alternator wasnt good. maybe its time for a replacement.
also check to see if you got any cut wires just dangling, those could be touching metal causing your battery to drain out

[jalopi]

Could be something else, but it's probably the alternator, wiring or regulator. It's just weird, because usually when the battery voltage gets too low (ie from not charging) the batter light will kick on.... which you said it didn't.

[K-Line]

It was the VR, got a new one today and it seems to be running properly but i guess only time will tell lol