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Paul B avatar image
Paul B asked

Low Battery Voltage warning 24v multiplus 3000

I have a client having a multiplus low voltage warning coming on regulary and also a allarm warning triggering ,

So the question is - is anyone else seeing this low voltage warning light happening ?????? and is wondering why. ??????

now the clients LiPO bank is in the final stages of balancing as I have 6 cells at 3.50 to 3.52v and two cells at 3.34v so the BMS is telling the multiplus and the smartsolar mppt to STOP charging as it should and I suspect by reducing the ccl to zero - and at this point I suspect that a INCORRECT low battery voltage warning is occurring.


Hardware installed 1 x Multiplus 24/3000, 1 x 150/35 MPPT 1 x 123smart BMS 8 x calb se200 cells 1 x Cerbo on fw 2.85

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1. multiplus on Newest fw 496 (No assistants installed)

2. I am thinking its occuring when the BMS changes the CCL to zero amps that this light then comes on

3. the alarm log is showing heaps of these warnings

4. DVCC is turned on and no assistants have been installed.


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MultiPlus Quattro Inverter Charger
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5 comments
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kevgermany avatar image kevgermany ♦♦ commented ·
Why are the cell temperatures so different?

Have you tried another way of balancing?

What are the settings in the multi?



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2 Answers
Paul B avatar image
Paul B answered ·

I have found that there was a bad connection from one BMS control to the next cell and thus a BMS fault error was occuring - this then changed the CCL CVL DCL settings to zero or sum such thing and causing the low voltage to trigger on the inverter.

well thats my report so far

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Paul B avatar image
Paul B answered ·

The setup has been on 496 fw but we are still seeing Low voltage battery light and getting a low battery allarm warnings on the vrm. I see that in the Fw change log that 495 had some improvements made, for BOL but I think its still happening on this site when the battery is 100% full and loads are low .

Notes below from 495 firmware change log.

March 15, 2022

  • Added “gridcode” for AS/NZS 4777.2:2020 appendix M (standalone inverter)
  • Max apparent power limited to 4.6kVA when VDE gridcode selected.
  • Improvements:
    • Low bat indication is generated when discharge is forbidden by BOL
      (BOL= Battery Operational Limits (used by DVCC on CCGX)
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