On grade A cells? Sounds like you have a bad connection to that cell and the voltage wire is getting incorrect info.
Hello, Thanks for the feedback.. I will do more investigations .the JK BMS shows a resistance for the sense wire on every cell, and they are all consistent and low... but again I will loosen and tighten the sense terminal on that cell, and see if it fixes the issue., will update this post.
Ok, as long as you promise not to tell anyone, I assumed that my careful torque wrench usage at install was still correct and effective, however all 4 of the bolts on the top of the Grade A cell #14 were floppy loose. Really?
It appears that I need loctite, or need to go back and check torque on every cell again, and that should be my first check.
Sheesh.. just disabled charge on the good battery, and enabled charge on battery 2 with the misbehaving cell #14.. assume that all is well except for someone who should know better.
First feedback from vendor was check the busbars.. and I didn't bother, it took all of 20 seconds to do that.
So.. if all else fails. Stop staring at a screen, and grab a torque wrench.
Sigh
Thanks very much for the feedback/help/support.
Ps.. promise not to share my stupidity.