Trotz KI-Hilfe komme ich nicht darauf, wie man den Lastausgang eines MPPT 100/20 von Node-Red aus steuern kann. Status auslesen und dort anzeigen über den Load/State Parameter ist kein Problem. Aber man müsste doch bei den Einstellungen im VictronConnect beim Lastausgang einen Betriebsmodus “Manuell…

Die Lösung kam über KI-Hilfe: bezüglich meiner Konfiguration habe ich eine Befehlssequenz über den VE-Direct-Bus (bei mir USB) von der KI erhalten, mit der ich direkt den MPPT in den gewünschten Modus steuern konnte. Das VE-Direct-Bus Protokoll für den MPPT ist sicher irgendwo dokumentiert, aber mit…

Hallo zusammen Ich habe das selbe Problem, in den Einstellungen gibt es kein “Manuell”. Bist du da irgendwie ein Schritt weitergekommen? Grüsse Silvan

AI can work wonders as long as you can verify what works and what is hallucination. Anyway, would be nice if you would share the solution as well, not only flag as solved for yourself :slight_smile:

This is no big secret, and the solution depends on your configuration. For example (directed by AI) I used an node-red exec-node with the command: echo -e “:8ABED0000B5\r” > /dev/ttyUSB2 This command turned the MPPT Load output off. The Load output on command was: echo -e “:8ABED0004B1\r” > /dev/…

Can’t get more basic than a direct write to serial. Are you not using the VenusOS large Node-RED platform and the available node libraries at all?

I couldn’t find any Node-RED platform node libraries to control the MPPT load output. I think this is just not implemented yet. So in order to solve my problem I had to go down to the lowest level.

Ok, but this is still on VenusOS Large or not? Asking out of interest in possible conflict between VenusOS and direct writes to serial.

Yes, Venus OS Large with NodeRed, standard Victron-System.

Ok, interesting to see you could still write to the mppt through the serial port even though it was (I presume) at the same time connected to and under control of VenusOS.

Lastausgang beim MPPT 100/20 per Node-Red steuern

Node-RED

UpCycleElectric (Jan) 26 September 2025 16:30 3

I encountered something similar with a BMV Smartshunt relay: I first needed to switch to manual, then switch the relay. And visa versa. See here for the use case and flow:

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Lastausgang beim MPPT 100/20 per Node-Red steuern

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