So I think there is something wrong with my shunt or BMV 712.
I installed it about 4 months ago and it's seemingly worked fine although I have had some trouble getting it up to 100% even though the voltage stays above the threshold (14.4v is what the battery voltage will hold at).
The other day however the BMV read 68% but my batteries had in fact fully drained (low voltage alarm going off on my inverter and lights flickering when I use the pump, etc).
I have no idea wtf went wrong. I fully charged my batteries through solar and the alternator and they reached 14.4v again. I reset the BMV completely and set the settings to:
Charge Voltage 14v
Tail Current 2%
Charged Detection Time 3m
Peukerts exponent 1.05
Charge Efficiency 99%
(All other settings are stock standard)
So I manually synced it to 100% and it showed that the batteries weren't excepting much charge from either the RedArc BCDC1250 or the Renogy MPPT.
Drained the batteries down and now the BMV won't go above 88% despite everything else and the voltage indicating full charged.
I have zero direct negative connections to my battery, everything is wired through the shunt. And the correct orientation. I have the temp sensor on the positive battery terminal.
I have a LiFePo4 Battery bank of x3 170ah wired in parallel.
Please advise or help me! The BMV is reading voltage fine. I think it's confusing amps somehow. It will show amps in and out and they seem correct but its not properly changing the values in SOC or something. It's failing me miserably and I cannot figure it out.