I have connected victron to solaredge using modbus TCP (sunspec) and in nodered (Large firmware) if I read for example error or status “connected” it still says (connected) even on the cerbogx console I see that solaredge is disconnected, does anyone know where the problem could be?
Yip. Solaredge is the problem.
Which node are you using? Which SE firmware? Which VenusOS version? (The “connected” status could not be retrieved.)
I’m using the “PV Inverter” node, SE 4.24.25, and Venus V 3.80~27 on a BBB.
Yes, I can confirm that the PV inverter status returns a valid status (MPPT) every 5 seconds, even when the PV inverter icon is no longer displayed in the console. The power values are also sent by the “PVInverter node” (frozen at the last value). Once the connection is restored, the status returns “null” before normal operation resumes. Therefore, I can’t determine whether the connection is actually interrupted, only that it was in past.
By the way: The “connected” status I could could see?
I disconnected the LAN cable from the SE as a test.
That is definitely not correct.
SolarEdge was responsible for the loss of communication, but not for the issue described by M4jkl. Node-red node can not detect a loss of communication, but UI does.
The SolarEdge is connected to the Victron’s AC output, so it’s always connected to the grid.
SolaEdge SE30k + 3x 8000VA Quattro (but max power is 20kW in panels)
SolarEdge FW: 4.0023.0524
Cerbo FW: 3.73
Quattro FW: 2655558
I tried disconnecting the LAN cable from the switch where the Cerbo is connected, and I read the data from PVINVENTOR in Node-RED (there’s no internet there, so I don’t know the exact address), I haven’t had any issues with communication dropping out (so far). This is my first time using a Victron Coupling, and I wanted to use Node-RED to trigger a relay in case of a Modbus failure (NC stop for Solaredge) (I have a delay set up, after recovery). I just thought I’d be able to read this exact “status” that I see on the Cerbo console. I know that frequency control works after a loss, and besides, the switches are backed up, so the chance that Modbus will go down is small but still real
Also, when I was setting the frequency according to the Victron manual, under Power Control → Alternative Power Source → Enable, I only had two options (Disable or Generator), so I selected Generator—is that correct? So I set 50.2 Hz = 100% and 51.2 Hz = 0% here, and then in Active Power → P(f) to P0 50.2 Hz = 100% and P1 = 51.2 Hz = 20%. Is that correct? I’d appreciate any advice; the Modbus communication and control are working fine, I was just unsure about this part.
The last thing that came to my mind (I think I’ll try it) is to download the solaredge modbus library to nodered and read some value directly from the solaredge and then evaluate whether it works or not.
My current settings:
