Why is my Pylontech Battery not fully charging?

DIY
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21

But where do you have the time setting for charging? I have no possibility in ESS?

22

It becomes available in the cerbo, once the assistant is enabled and deployed:

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23

Thank you. I will try tomorrow morning when everybody is sleeping :slight_smile:

24

No Problem.

I think, adding the Assistant will temporary shutdown and restart the system, so don’t get a heartattack after uploading the new configuration :stuck_out_tongue_winking_eye:

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25

And in case your cerbo is not provided with backup power, you may need to temporary disconnect the vebus cable to the multis to get it starting again.

See:
https://www.victronenergy.com/media/pg/Cerbo_GX/en/troubleshooting.html#UUID-3b79e679-4b70-7be3-b25a-2dbf49cd3dac

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26

In the multi configuration change absorption from 48 to 52.3v

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27

Do you mean in VE Configure?

28

Yes

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29

Thank you!

30

The update didn`t work. I had a VE.Bus Error #10 on the Multiplu II. Now I have to check the VE.Bus Error meaning.

31

@manni27
https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom

Firmware updates will reset the inverter to factory settings. You will need to re program.

Error 10 is usually in a three phase or parallel system? Your post doesn’t mention that is your system type.

32

No one mentioned a possible blown fuse/open circuit between MultiPlus and battery?

If the MultiPlus shows 52V and the battery 51V and there is no current flow than there is probably a problem between the two.

Please start reading the manuals for your components and also read the ESS manual.

https://www.victronenergy.com/media/pg/Energy_Storage_System/en/ess-introduction---features.html

https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom

33

No, I am on a 1 phase system

34

In case I turn off the grid power there is no issue with the inverter using the battery. So fuse seems ok. (Both manuals are read btw.)

35

And you can confirm the voltage with a multimeter at the terminals of the MultiPlus and the batteries?

I’m pretty sure that voltage difference is the cause of the problem.
From the MultiPlus’ POV the batteries are full (52,3V) so it stops charging.

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36

Definitely at this point now.

37

Yes, I did the measurement 3 times and also for every US3000C and for the total stack. What I don’t understand is the voltage difference between what I measure at the battery connection points on the Multiplus II and the values the Dashboard provides me.

38

What do you measure at which points?

39

The screws on the Multiplus II on which the DC cables (power from battery) are connected.

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40

Numbers please!
What voltage do you measure at the MultiPlus and what at the batteries?

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