In my experience with the Pylontechs, the Voltage of 52.4V is to high, because of many high voltage alarms.
I then changed the max charge Voltage to 51.2V (if SOC is < 90%), and if the Voltage is reached (and the max diff Voltage from the cells are lower than 35mV) then i automatically increase the charge voltage by 0,1V until 51.6V. The max cell Voltage then is 3,45V - 3,47V.
With this algorythm you can also go to 52.4V step by step without any high voltage alarm.