Thanks for answering Maine
Sail. I realize it's probably been covered in the Lifepo4 thread but that is over 300 pages long.
My charge shut off is 29.4 volts and the BMs shut off is 30v. We think the alternator wire was to small causing a voltage drop and therefore still sending current
once the battery
We ran a heavier wire and that seems to have resolved the problem
The alternator uses the Mastervolt alpha pro.
As a back up they installed a relay that on the alternator field that cuts power in the event of BMs cut off.
Maybe the charge shut off and BMs cut out are too close
Batteries are Winston 400 AH x8 for 24v system
100 amp alternator
750 watts solar through 2 genasun smart controllers