Battery voltage shouldn't have been low... but I'm speculating. It had been plugged into shore power for two days and only "unplugged" minutes before, so I'm assuming the battery should have been charged if everything is working correctly. Again, that's an assumption and we know how dangerous those can be.
Only one battery...
All the wiring and connections appear clean and tight.
Each time it blew I was only using the slide. I even made sure I wasn't even running any lights and the fridge was not running on LP.
I have not checked the water levels. It's only a month old so I assumed they were fine... Again, another assumption... and one I can easily check out tomorrow in the day light.