PylonTech does not report single cell voltages - only the 2 cells with maximum or minimum voltage.With PylonTech BMS, can you get cell level information?
Is it better to have the batteries in master/slave configuration, or read each battery separately (all in master mode)?
The low voltage protocol also does not send identifiers for different packs. So when running them in master/slave configuration the master will most probably aggregate the data and I see only one BMS.
The high voltage protocol does send identifiers (1-15).
Running each of the multiple BMSes separately (on a separate [can] port) is also possible and will give you more details.
So it depends on your BMS if its LV or HV (I think in your case LV) and on what level of details you like to receive.