For the 8735AD the entire unit has to go. The board has soldered connections. The tech said there is a jumper fix that sometimes works with the old firmware version 1.7. They will update firmware to version 1.9 and "lock" it in LiFePo4 if I ask. Sounds like your experience...carpense said:@rfuss928 Interested in hearing how it goes. It only took me about 10 - 15 minutes to pull out. Reinstalling was about the same amount of time. Good luck!
You obviously have not looked at the original diagram the OP posted which is what I commented on and there are different ways to wire batteries in parallel. Depending on length and gauge the top diagram is preferred for longer and smaller gauge wire.rfuss928 said:Maxcamp8
It concerns me that the three folks that chose to offer detailed critique of your wiring diagram so far cannot see that the batteries are clearly shown wired in parallel. I would look elsewhere for electrical advise...