I finally -- begrudgingly -- installed a dual battery. It was more of a necessity than anything, but its price point is hard to stomach.
Dead Battery Issue
For months, I had been having issues with my stock battery. There had been numerous instances where I'd park at the airport and return with a dead battery. Traveling around with a jump starter battery was a necessity. In fact, in one instance, even the jumper battery wouldn't work and I was stranded in the DIA economy lot until I hunted down a stranger for a jump.
I had tried it all. I disconnected the auxiliary battery as I thought it may have been draining the main. I ran parasitic drain tests. I disconnected all accessories. Still, I was constantly getting the "aux switches unavailable - battery charging" error almost daily.
Ultimately, I reached the conclusion that a cell in the battery had been damaged. I had never significantly drained it, so I don't know how it happened, but the battery needed to be replaced. Jeep, of course, was no help.
Genesis Dual Battery
Enter the latest Genesis dual battery setup. Cost something like $1300 in total (ouch, VERY ouch) but I haven't had an issue since, and I'm even finding that things like app-based remote start works with 100% consistency, whereas previously it worked maybe 25% of the time.
For those judging the wiring, there are half a dozen relays and numerous accessories running off of this battery. This is as good as it gets!
Installation was surprisingly easy. The hardest part, by a mile, was reorganizing all of my cables. Right now, I'm just glad I'll never have to deal with a dead battery issue again.
My only complaint is that the battery tray doesn't leave much room for the oil dipstick. In fact, I'm pretty sure the oil dipstick can't even be pulled out. I left as much room as I could for it, but would've been nice if Genesis left some more space there.