I wired this 712 BMS like this?
However, I'm getting strange readings. Battery SOC never moves. Negative #'s. What did I do wrong? Here is 2 screen shots from running gen and not.
asked
712 BMS wrong readings. Wired wrong?
Try and put the shunt between the battery negative and the negative busbar. Shunt is labelled Batt side (battery) and Load/Charger side (- bus).
I assume the frame (chassis?) would go to the - bus.
Which of the 8 batteries would I connect the shunt to? Am I not con
necting directly to the negative battery via the busbar?
@cfetts, did you set the total Ah capacity in the BMV correctly? If you have 8 of these @210Ah each at 12v and you wired them in S/P to get 24v, you now have 840Ah at 24v. I concur with others that we'd like to see an actual photo or two of your wiring around the battery bank/busbars/shunt, but I definitely want to confirm your Ah settings as well.
Hi
I'm pretty sure you have the shunt in the wrong place. It needs to go between the neg bus bar and the battery neg (you may have an additional bus bar for this. No other negs should attach direct to the batteries.
The shunt also has a particular way around it needs to go its marked on it.
The readings you are getting is because you have a circuit so your getting a charging voltage, and the voltage goes down when discharge but no or very little current is flowing across the shunt!
Send a pic of your install and we can help some more
