question

jolilo avatar image
jolilo asked

SOC V485 to V502

2023-02-19-14-27-00-maison-monteils-vrm-portal-max.pngMultiplus II GX V485 to V502

Hello, I updated my multiplus II GX

to solve a problem (sometimes its display freezes)

but since I have an astonishing behavior of the management of the SOC!


previously the SOC went to the value set in the "parameter at the end of the bulk phase" when the absorption voltage was reached


Now the coulter passes the value set to the "end of bulk phase parameter" when the float voltage is reached


what do you think of its new functioning

is this normal or an update bug?


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SOC
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jolilo avatar image jolilo commented ·


Good morning, I need help downgrading firmware because this operation does not suit me not . where to download the firmware to be able to solve my problem


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jolilo avatar image jolilo commented ·

I managed to go back to V498 it's the same problem!

I made a test with the V488 version

I hear tomorrow while charging to check

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3 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Install a SmartShunt and you will have a way more accurate SOC measurement.

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jolilo avatar image jolilo commented ·

Hello Matthias

I followed your advice, I added a smartshunt to my installation, it works!!

THANKS

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jolilo avatar image
jolilo answered ·

Thank you, Matthias I'm thinking about it, it would improve that's for sure.

but I like to understand, and I can't understand the change in behavior of the SOC calculated by the Multiplus am at the firmware update, I think it comes from the update of the vbus bms

there must be a new setting

but I confess I have not found!

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Alexandra avatar image Alexandra ♦ commented ·
Charge up the bank to 100% and keep it there for a while, it is possible that it has lost sync. Looking at your battery curve it has not made it there.

I have found when using the internal monitor for SOC the 100% charge is important daily.

The shunt would be better if you don't have batteries with comms to the GX.

The ve bus bms thing would only have affected you if you have victron batteries.


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jolilo avatar image jolilo Alexandra ♦ commented ·

Good morning,

after a programmed charge this morning

normal functioning and income

the end of charge state changes to 84% when the programmed absorption voltage of 55.2 is reached!

there is something that does not work for me with the new firmware, please help me

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klim8skeptic avatar image klim8skeptic ♦ jolilo commented ·

@jolilo It looks like you also have solar charging your batts?

Please show a screenshot of the "General settings" tab from VE Configure.

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jolilo avatar image jolilo klim8skeptic ♦ commented ·

there you go, Klim.2023-02-28-08-07-35-soc-v485-to-v502-victron-commu.png

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klim8skeptic avatar image klim8skeptic ♦ jolilo commented ·
@jolilo When my Li batts end bulk charge, they are better than 98% Soc.

Charge efficiency would be 99%.

Do you use solar mppt to also charge your batts?

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jolilo avatar image
jolilo answered ·

img-20230227-083241.jpghello alexandra.

I made a first downgrade from V502 to V498

we see on the load scheduler at 5:00 the frozen SOC!

I redid at 10:00 am a downgrade from V498 to V488

on the modification history it is before the implementation of the vbus bms

but not seen to check because it is snowing in the south of France

the next sunny day I will check my track.

Another track is the version jump from v485 to v502 not too important?

Cordially.

2023-02-27-18-05-10-maison-monteils-vrm-portal-max.png


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Alexandra avatar image Alexandra ♦ commented ·
@jolilo

The newwr firmwares between 498 and 502 are grid code changes... None related to france. And one for better generator integrations and some stuff for quattros.

In your case if it was working and doing what you needed to, it makes no sense to update.

It looks like your batteries are not finishing charging. The amp draw is quite high and remains high the whole time.

You need to leave them on charge for longer or give them a higher charge current during your charge window. Do this untill they stop taking in the amps.

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