Thanks for the ideas and tips everyone. I appreciate it.
Here's a quick summary as to the why: While in storage, I neglected to turn off the inverters. Even with everything else off, the inverters will still drain the batteries and the solar charger can't keep up. So, since my MH was in storage away from home, I just wanted to get it home to work on it. I disconnected the motor batteries and charged them up; they are sealed batteries and charged up nicely. I hooked them up and brought the MH home. The battery burst when I connected to 20 amp shore power (I forgot to fill the coach batteries first).
So, I have since filled the remaining batteries with distilled water and tomorrow, I'll buy the replacement battery. Then, I have to hope that the other batteries will hold a charge. Otherwise, I get to spend $750 on 5 more batteries. Also, I hope charging/replacing the coach batteries is the reason why my generator won't start. This was a waterfall event where I have to fix one thing before fixing another and so on.