REC ABMS with split bus firmware - how to specify different discharge and charge temps?


  • Topic says it all.  I have a REC ABMS running latest 2.92-2 firmware for a split bus.

    Batteries are 4s4p 280Ah cells.

    The charge side is using a pre-charge 3.0 module which controls a Blue Sea contactor.  Charge temp is set to 3C and above in the ABMS settings.

    The discharge side controls a Victron 220A battery protect.

    Everything works properly except being able to specify a lower temp to enable discharge.  Right now at below 3C both sides disconnect.

    I want to run the discharge down to -10C as still inside the cells "safe" range.  



  • @John a probably solution is to use output: relay1 and opto2.

    Under task you can make different settings. See screenshot from task menu.


  • We are going to need to get REC head office to give us some input on this one.  They are closed until the new year but by way of this post I am letting them know.

    Any ideas on this one Tine?

    Thanks,

    Rick

    @Tine Andrejasic 


  • @Rick Thanks!  I was going to email them directly but knew it was holiday season so tried this forum.  Happy holidays!


  • Hello John,

    Did you try to set in task, "7" on, for the charge bus.

    Load bus, I expect don't switch off at that temperature.    It don't solve all your question, but the system will work better then when switch off both.


  • Charge current is only set to 0 A when the temperature goes under the Under-temperature for charging. Contactors are ON unless you select them in the TASKS for the charge relay 1. 


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