Disaster strikes! I told my wife she could use the battery bank, so she did. But, I didn't recharge it because I wanted to monitor the high voltage settings on the charge controller.... The DC-DC converters claimed to have a low voltage disconnect built it, but there was no adjustment so I kind of doubt that... In any case, my cells got overdischarged and puffed up sadly.
As of now, this project is as dead as my batteries!