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hoeken avatar image
hoeken asked

DVCC with two different inverters + Cerbo + Lynx Smart BMS

I have a sailboat with a lithium battery system, cerbo, lynx smart bms, a 5000w 230v Quattro and a separate 5000w 120v Quattro. The 230v Quattro is connected to the cerbo directly via VE.Bus. The 120v Quattro is connected to the Cerbo via a USB MK3. The system is working well and I can see and control both inverters from the Cerbo.

I'm trying to set it up so that both inverters shut off when the battery gets to a certain SOC (20%). I found that in the Lynx Smart BMS I can set the discharge floor with Victron Connect and that will disable the ATD. The 230v quattro that is connected directly via VE.Bus turns on and off as expected, but the 120v quattro over the USB MK3 is not turning on or off.

Are there any settings I need to change to get the 2nd inverter to follow the DVCC instructions from the Cerbo? I've looked around quite a bit and nothing is jumping out at me.

cerbo gxDVCClynx bms
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nickdb answered ·

You can't control multiple, independent inverters with a single GX. It is not designed to work that way. You will only have partial functionality and DVCC will not work in that scenario.

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hoeken avatar image hoeken commented ·
This seems like a strange oversight on Victron's part. Do you know what the technical reason behind it is? I don't know how the code underneath the hood runs, but it seems like it should be a pretty straightforward software change. Instead of hardcoding as a single inverter, loop through any available inverters / VE.Bus connections when sending ATC and ATD.


To be clear, they are separate inverters, on separate VE.Bus'es. It is already working for me to see both of them on the Cerbo, as well as control on/off/charger state through the cerbo for both. So its definitely possible to do this, but whether it is a software development priority is a different question.

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