question

Meno Himmelreich avatar image
Meno Himmelreich asked

SoC jumping to 100% in minutes.


My SoC is jumping to 100% every day at around 2:44am.

This behaviour is new and I did not change any settings the last few weeks. I think this could be firmware-update related, due to some similar threads I found here.

The BMS is just for Cell protection. I use the SmartShunt 500 to measure the SoC.


The drop-off of the SoC after the 100% is me manually adjusting the SoC via Victron Connect on the SmartShunt.

1663916304154.png


1663916389002.png


1663916361306.png


This figure shows, that the voltage is acting normally.

1663916602559.png


Single Cell Voltage over a period fo 12hrs

1663916795990.png



Multiplus-IISmartShuntSOC
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1663916361306.png (36.7 KiB)
1663916389002.png (37.3 KiB)
1663916602559.png (47.0 KiB)
1663916795990.png (292.2 KiB)
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3 Answers
marekp avatar image
marekp answered ·

@Meno Himmelreich

How your BMS is connected to MP-II?

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Meno Himmelreich avatar image Meno Himmelreich commented ·

I use the BMS (JK-BMS 150A) just for Cell Protection. The BMS ist connected to my SmartHome/Database to monitor some values, but it is not connected to the Victron System in any way.

The actual measuring is done by the Victron SmartShunt.

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Meno Himmelreich avatar image
Meno Himmelreich answered ·

This is my system:

kamepv.jpg


kamepv.jpg (353.0 KiB)
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marekp avatar image marekp commented ·

@Meno Himmelreich

Check if your SmartShunt not loosing power.

screen-shot-2022-09-23-at-92432-am.png

screen-shot-2022-09-23-at-92826-am.png

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nickdb avatar image
nickdb answered ·

And what are the shunt settings? You sure they didn’t change post update?

If the shunt is syncing then the 3 criteria have been met.

What are the battery charging settings in the multis and mppts?

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Meno Himmelreich avatar image Meno Himmelreich commented ·

Are these the figures, you asked for?

Shunt:

screenshot-20220923-093437.jpg


MPPT:

screenshot-20220923-093459.jpg

MultiPlus II:

1663918828606.png


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