Victron Multiplus + CerboGX + LiFePO4 (with REC BMS)

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Marcus asked Mar 13, '22

Victron Multiplus + CerboGX + LiFePO4 (with REC BMS)

Hello,

I have a Victron Multiplus 12V 3000 16A with a 560Ah LiFePO4 Battery System managed by a REC BMS. They are all connected via RJ45 to a CerboGX.

How can I tell the Multiplus it is working with a LiFePO4 Battery and not an AGM?

I was unable to find anything in the CerboGX to configure it. Frankly I wasnt even able to find anything on the Multiplus manual how to connect it to CerboGX, but it is visible and usable in the CerboGX now.

I have the problem my Multiplus is pumping 80Ah into the batteries although they are at 98% (according to the CerboGX and Volts) and then the BMS shuts the Relais, and reopens them, when the inrush current stops. I figure the threshold on the volts is to high, but why isn't it slowly charging, but pushing 80A in?

cerbo gx multiplus ve.bus

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Stefanie (Victron Energy Staff) answered · Mar 13, 2022 at 12:51 PM

@Marcus,

provided DVCC is enabled, the BMS should communicate the charge current limit (CCL) and charge voltage limit (CVL) to the Cerbo GX. The Cerbo then controls the MultiPlus according to those limits.

80A is not unusual high charge current as long as the battery is not fully charged.

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Marcus commented · Mar 13, 2022 at 01:50 PM

I will have to check again on DVCC, I did everything to be done according to REC BMS, but let me check again.

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Marcus commented · Mar 20, 2022 at 03:49 PM

Thats it. Missed the DVCC setting and the appropriate settings to it. Thanks

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Answer 1 · 2022-03-13T13:35:26Z

klandos answered · Mar 13, 2022 at 01:35 PM

If dvcc is not used, did you set charging limits in VEConfigure (or VictronConnect with MK3 Interface)?

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Marcus commented · Mar 13, 2022 at 01:50 PM

No, I did not, since I use Mac and have no possiblity as it seems to configure the Multiplus.

But I will have to check on DVCC.

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klandos Marcus commented · Mar 13, 2022 at 03:09 PM

Victron connect Works fine on a mac, even a M1. MK3USB is a must.

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Answer 2 · 2022-03-13T13:50:42Z

Matthias Lange - DE answered · Mar 13, 2022 at 01:50 PM

To change settings of the MultiPlus you need VE.config.

https://www.victronenergy.com/live/vrm_portal:remote-veconfigure

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