One suspects your problem is the rouge battery, a resting voltage of 11.2 after 24H tells me the battery has passed it's use by date.
Perhaps tell us how old, what it has been used for, how it was maintained.
A of J
Don't really know the age of the battery....bought all of em together (used) from a dealer about 2 years ago. These are my back up batteries
for when the grid drops out. Keeps me running for about 6 hours with no gas generator running. I was probably lax on battery maintenance,
checking water monthly, SG every six months. They have worked very well in the past, so I really should be thankful for that.
I've just been putting off buying more batteries. Think I'm gonna get some 6v deep cycle golf carts, 75 amp hour, 125 minutes from Sams Club.
They're just $79. each, so I figure about 6 in series/parallel will fill my needs.
Thanks for the reply......
Bill