MultiPlus II and Quattro as charger-only units

Node-RED
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1

Hello everyone,

I’m having trouble understanding the charger logic of the MultiPlus II and Quattro when used with a Cerbo GX.

My main PV system consists of MPPT solar charge controllers and Quattros, a Cerbo GX, and a Pytes battery:

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I then have a second system consisting of 3x MultiPlus II units and a Quattro (connected to a Cerbo GX via bus and USB), which are configured as chargers only:

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No battery is “connected for communication” here; the systems are connected only on the DC side!

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In the individual devices, you can set the charger parameters directly using VictronConnect:

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How can I set the float voltage and charging current via Node-RED?

Depending on the main system’s battery state of charge or any surplus power on the grid, I want to charge the battery in addition to maintaining the float charge, or fully charge it.

I tried enabling DVCC on the Cerbo GX for the chargers, but that didn’t help. What am I missing?

2

If you have chargers added via a mk3, you just have to enable dvcc support for them in the gx. They will then follow the charge control of the whole system.

No nodered required.

3

But I’d like to be able to control the chargers independently of the rest of the system?