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Posted (edited)

I just bought 2 Pylontech UP2500 batteries.

I just want to know if the charging voltages are correct as shown on the attached pic. I am a bit cautious on the high voltages given, with reference to the other 48 Volt models given as 52.2 volt ( If my memory serves me right) as charging voltage. Divided by 2 it gives me 26.1 volt which seems a bit low for 24 volt systems. Can anyone advise what the voltage should be. According to PylonTech the high voltage protection kicks in on 28.5 volt and low voltage disconnect at 23.2 volt. Max charging is 55 Amps per pack.

My thinking is more like Charging at 28.4 volt and "float" at 28.4 volt. Max charging at 25 - 50 amps for both packs. Seeing that it have 7 cells, thus max per cell is  4.11 Volt and min is 3.31 volt. So charging at 28.4 volt will place cells at 4.06 volts. Does this sound right?

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Edited by IcePick1957
  • 2 weeks later...
Posted

Interesting that the specs show the range of operation is 23 to 28.8V. This is above and below where the BMS would switch off the battery. I would think you want to operate at a level before the BMS switches off?

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