So I have been thinking.... Since I am using a Midnite Classic 150 charge controller and it can do 12-72volts battery.
What if I make it a 18s, 4volts per cells X 18 = 72max. This mean I can series the 48 and 24 module together. However, my inverter show it can only handle 60volts max. But I should be ok if I set my charge controller to never charge above 60volts. But then this would only allow me to charge each cells to 3.3volts
The other option is to connect the 48v module and 24v module, but only use up to 14s to make 51.8v nominal, that would be perfect.... and leave the other the left over cell un-use. But is it possible to add a terminal in between the tab?
Advise anyone?