I have four CATL 302Ah with a Daly BMS, everything is working great. I have the room to add 4 more cells, do I just get a second 4s BMS and plug them in parallel or is there a way to run them is series at 24v and have a 8s BMS that would output 12v and accept a 12v charge. This is for an RV and my 3 chargers are 12v and obviously I need a 12v output.