I have the same batteries but with a different bms/ battery issue... I have 8 of the 12v 100 ah batteries connected to make 48v 100 ah x2. Hooked up to my electric vehicle. After a day or two. They show (close to these voltage.)
11.4, 11.5, -35.0, 11.4.
And
11.6, 11, 11.4, -34.7,
Why would...