Good info LY, although it still appears you and Mex are using "wall" in different ways. I am not clear whether that means you are talking about two different things.
So the "good" 100 that sat overnight at 13.6 was jacked back to 14.8 and amps jumped to 3.5ish and then tapered down nicely to 0.1 amps. So I decided there is nothing wrong there, disconnected that one and connected the suspect 100 that got warm which was sitting this morning disconnected at 13.16 (full)
Converter set at 14.8 and amps were 4.x and tapering, going down evenly to 1.1 amps and stalled there--been there for an hour. Battery temperature has not gone up at all.
Not sure what to do now to figure out what if anything is the matter with this 100. It got warm after I tried to find the wall when after sitting at 14.8 and bottoming out for amps, I jacked up the voltage to 15.4. So like Groucho M, said, when playing a doctor, "Does it hurt when you do 'that'?" "Then don't do that!"
As it looks now, the 250AH 8D bottoms out around 0.7a or less, the good 100 at 0.1, and the second 100 at 1.1, but it does not heat up sitting there at 14.8 taking that 1.1.