Charging a Battery Bank

I cheated on the charger wiring...I'm cheap and lazy sometimes. The 2 red wires were cut from one wire that had lugs on both ends. Not proper I know. The controller, inverter and charger leads all go to the same posts. The drawing separated them a bit for ease of drawing and understanding. One of the bigger puzzlements to me is, based on SG, how I got from 0% SOC to 100% in 2 hours. That cabled charger is an old Harbor Freight CenTech garage unit that has a timer and can be set on 2a, 10a, 40a or 200a for starting. Nothing special. I'd originally been happy (will still be) if the PM could get from 50% SOC to 80 or 90% SOC in close to 2 hours.

I need to "unpack" the batts to watch SG before more testing. Both low cells were in the same battery...didn't notice seeing different levels but will check.