question

rebuild2558 avatar image
rebuild2558 asked

Skips from 50% to 100% despite not full

I monitor my battery charge through the multiplus, however there is a dangerous problem with the system. I have noticed that sometimes when the unit charges at 3000 watts, that it skips from wherever it is to 100% SOC. Battery charge voltage is at 55.2V, but even when the battery is at 54.84V it wants to skip to 100%. I don't see any errors on my BMS, but the multiplus skips to bulk and wants to remain at 100%. This is dangerous, because when I don't monitor the system, it will discharge to dangerously low levels, leaving the BMS to jump in for safety. Anyone have an idea what might be happening?


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Multiplus-IIbattery chargingerror
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1 Answer
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

The SOC measurement of the MultiPlus is not very accurate, I would recommend to install a BMV or SmartShunt.

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