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ardowolx avatar image
ardowolx asked

CAN communication error between EEL battery BMS and Multiplus II

Hello

I have a Multplus II 48/5000/70 and a EEL LiFePo4 battery with what I know a JK BMS with CAN communication. The BMS allows me to choose "Victron" as communication protocol and it should work with MPII.

But as soon as I connect the UTP cable to VE.BUS in the MPII, it switches off and gives me various error codes via LEDs (I can not connect via MK3-USB while the MPII is in error).
LEDs indicate error no 5, 11 and 14. When I switch the MPII on while the UTP cable is already connected, it gives me this disco (attached).
When the UTP cable to the BMS is disconnected, everything works fine.

I have updated both MPII and BMS firmware and as far as I know, they should be compatible with each other.

What else could I be missing? In the beginning I did not have the MPII earth connected to battery GND - could this have damaged some communication components? This is remote setting, no constant AC-IN is available.

Multiplus-IIBMSVE.Bus
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3 Answers
Alexandra avatar image
Alexandra answered ·

@ardowolx

It is supposed to connect the BMS can port of a GX. Not directly to the ve bus.

It can connect directly to a MP2 if it is a MP2 GX (as in it has an internal GX)

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grajchend avatar image
grajchend answered ·

I have the same battery. It needs to be connected to CAN bus with a non-standard twisted wire cable. The BMS is a Seplos BMS. With a quick search containing "seplos & victron" you'll find the cable layout.

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ardowolx avatar image ardowolx commented ·
But I still need GX right? I still can not connect the battery to the VE.BUS of a (non-GX) Multiplus II, right?
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gloitom avatar image
gloitom answered ·

Same Issue here!

Multiplus three phase system, I restarted the Cerbo in the remote terminal.

Now the 3 Multipluses only show this LED pattern.They are no longer displayed in Cerbo.


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