Multi RS & Lynx Shunt with different SOC

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question

ubi asked Oct 8, '23

Multi RS & Lynx Shunt with different SOC

Hi,

I recently upgraded my system with a Lynx Shunt and now the Multi RS shows his own SOC (few % more). I have a 10% dischage limit, but today the Lynx Shunt showed 6% but the Multi RS (SOC 11%) didn't turned off. Before the upgrade the Multi RS used the Smart Shunt's SOC.

System before upgrade:

Multi RS Solar 450/80

Smart Shunt

MPPT 150/45

MPPT 100/20

2x 14kW Lifepo4 Battery

Cerbo GX

System after upgrade:

Multi RS Solar 450/80

Lynx Shunt + Lynx Power In

MPPT 150/45

MPPT 100/20

2x 14kW Lifepo4 Battery

Cerbo GX

I can chose in the Cerbo system setup -> Battery monitor which SOC should the system use. After a complete reboot it has no effect. I can't use the Multi RS SOC because I have two more MPPTs.

What could be the problem? Do you have any suggestions? Is the Multi RS compatible with the Lynx Shunt?

Thank you.

SOC lynx shunt Multi RS

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Guy Stewart (Victron Community Manager) ♦♦ commented · Oct 09, 2023 at 02:50 AM

Hi @UBI,

Thanks for the report, I'll see what I can find out.

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ubi Guy Stewart (Victron Community Manager) ♦♦ commented · Oct 28, 2023 at 09:58 AM

Another interesting fact: When I use the BMS as the "Battery monitor" in the Cerbo system setup, the Multi RS uses it immediately. It only doesn't work with the Lynx shunt.

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Guy Stewart (Victron Community Manager) ♦♦ ubi commented · Oct 28, 2023 at 09:06 PM

Hi @UBI

Indeed there appears to be a specific limitation with the Lynx Shunt and RS inverters.

The engineers are now aware and I’ve just asked them for an update on the situation.

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semlohnhoj Guy Stewart (Victron Community Manager) ♦♦ commented · Oct 28, 2023 at 09:58 PM

I use a lynx shunt and two Multi RS Solar units and all three show different SOC values

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Modifications Space

Node Red Space

Answer 1 · 2023-11-28T10:52:51Z

Martin (Victron Energy) answered · Nov 28, 2023 at 10:52 AM

We just released firmware v1.10 for the Lynx Shunt VE.Can which addresses this issue. It it available on Victron Professional and through the VRM firmware update feature.

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semlohnhoj commented · Nov 28, 2023 at 12:36 PM

I had to reset the SOC after installing the firmware update but I can confirm that the update has resolved the issue for me. Both of my Multi RS Solar units now show the same SOC as the shunt.

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