Multiplus II 48/5000/70 can't charge at 70A

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oles asked Jun 24, '24

Multiplus II 48/5000/70 can't charge at 70A

I have a Multiplus II 48/5000/70 connected to a 15kHw 280Ah 52V LiFePo4-Battery with JK-BMS and CerboGX.

I can't get full charge rate at 70A from AC-in - maximum battery charge current seems to be limited somewhere to 50A.
BMS charge limit set to 90A, at MultiPlus II using VE config - charge 70A, at DVCC to 70A - but charging does not exceed 50А :(

Multiplus-II

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Answer 1 · 2024-06-24T15:06:37Z

derrick thomas answered · Jun 24 at 03:06 PM

Is 'weak ac' disabled?

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oles commented · Jun 24 at 05:51 PM

yes, disabled. AC-in when is avaible - 50GHz 230V, not from generator

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Answer 2 · 2024-06-24T17:56:54Z

nickdb answered · Jun 24 at 05:56 PM

Did you change the inverter charge limit defaults in veconfigure?

What CCL is the battery sending?

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oles commented · Jun 24 at 07:14 PM

ССL while charged at 50А shows 25A >:-\

Currently 12.5A

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Answer 3 · 2024-06-24T19:34:53Z

oles answered · Jun 24 at 07:34 PM

I hope that I founded whereis the problem - Remote VEConfigure for Cerbo (for Multiplus II) - says that it stored remote config but realy not.

Download config again shows that nothing changed.

Storing config file localy and after upload to Multiplus seems to help. When mains will be off I will see the rezult.

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Duivert NL commented · Jun 24 at 07:37 PM

Hi yes ve configure stores the settings but in the file, not directly in the online multiplus

you need to load to the multiplus in vrm, it doenst do that automatic

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Answer 4 · 2024-06-26T05:58:43Z

oles answered · Jun 26 at 05:58 AM

VE config file with 70A uploaded. Everywhere could not be changed to 70A changed, but still does not charge more than 51-52А :(
Who provides the data as CCL? BMS ?
But in BMS max charge current is 90A
Screenshot_2024-06-26-01-07-13-70_bc2aea2f1887607afb8a748e894fe9f8.jpg

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Duivert NL commented · Jun 26 at 07:06 AM

the battery BMS controls the CCL, the higher the SOC the lower the CCL, so its not a fixed value

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Answer 5 · 2024-06-27T06:41:09Z

oles answered · Jun 27 at 06:41 AM

It looks like the BMS is sending CCL data to the Victron as to how many amps it should be charging. When I turned off DVCC, the charge current increased to 63A
Now the problem is where in the JK BMS settings I can change these data for the DVCC ?
The situation with energy in Ukraine is such that it is necessary to charge as quickly as possible, as soon as power appears and not to look at the SOC
Screenshot_2024-06-26-20-57-31-29_bd59be8c3f820c1e3d6fc2892aab342d.jpg

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derrick thomas commented · Jun 27 at 12:55 PM

If you are using louisvdw dbus-serialbattery driver then refer to the docs on the GitHub for instructions on how to change the driver configuration. I do believe the default parameter is 50 amps.

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