If the bike was running perfectly fine and you stalled it, I think I would suspect the battery first. I have the same bike. It takes about 90 seconds to take the seat off and take the battery out. I would think that any auto parts store could test it.
If the battery is fine, then it's obviously something in your charging system, Or, as mentioned, a short somewhere.
2011 Ultra Classic Electra Glide FLHTCU
Jackpot 4" Dyno Tuned Mufflers | Jackpot 2/1/2 SPC Head Pipe | DynoJet PowerVision