AC PV Inverter power limiting via virtual device, possible?

Node-RED
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1

I’m wondering if anyone has managed to get power limiting working for an AC PV inverter that’s injected into the Cerbo GX via a Node-RED virtual device.

My setup: I’m using a Node-RED virtual pv inverter to feed my PV data into the Cerbo. This works fine.

I noticed that the path /Ac/PowerLimit exists on the virtual PV inverter device, and I’ve been able to read from it and map that value back to my actual inverter so the inverter does respond and limits its output to the specified wattage. So far so good.

The problem: I can’t seem to enable dynamic power limiting for this virtual device in the Cerbo GX settings. The option just isn’t available the way it would be for a natively supported inverter.

Has anyone else tried to do this, or have any insights on whether it’s actually possible to get the Cerbo to actively manage/write to /Ac/PowerLimit on a virtual device? Any pointers on the right approach would be much appreciated!

2

you could send directly to the PV Inverter with Node Red , without using the virtual device for that?

3

The sending to the inverter part is not really the issue. I want that dess takes control of that inverter what can be with sunspec compatible inverters or solaredge inverters. I want to use that through an virtual devices because me solis inverter doesn’t support sunspec

4

I build a sunspec bridge for my Growatt, does the ESS use Sunspec to limit output from PVs? If so I want to add that to my code.

5

No the issue is that the virtual pv inverter from node red isnt controlled by ess. Its purely between the virtual pv inverter and ess. Im looking for some know how to do this, if even possible

6

I did not use a virtual PV Inverter. My Cerbo talks to my sunspec bridge directly (port 502) and I make the bridge talk to my growatt inverter.