how to set abms to have less than a 100 percent soc

• t

  tom

  4/29/25, 10:53 PM

  i would like to adjust the bms to charge only to 90 or 95 percent instead of full charge

  what settings would i change?

   

  thanks

   

  tom

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• R

  Rick OGM Support Staff

  4/30/25, 8:18 AM

  Currently there is not a single command way to do this but you would just need to adjust your CHAR parameter down to about 3.5V.

  That being said, we do not recommend it for long term use as it will affect the ability of the BMS to balance your cells properly

  From page 23 of the manual:

  When the highest cell reaches the End of charging CHAR voltage setting, charging current starts to
  ramp down to 1.1 A x Number of Inverter/Charger Devices STRN until the last cell rises near the End
  of charging

  CHAR? or
  CHAR x.xxx
  Cell End of charging
  voltage 

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• S

  Stefano

  5/6/25, 3:47 PM

  If  you have a Cerbo gx,  the Venus OS large and associated node-red functionality reportedly allow to set the charging parameter such that you could charge 5 times to 80% and the eight time up to 100 and balance. I am in the process of discovering exactly how. This is unsupported and at your entire risk.

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