Modify multiplus 2 battery charge from the vrm

[Jose]

You can change the battery charge current on the cerbo gx or the vrm, the only way I found was using the ve configure

[nihonjin98]

I managed to use node red to create a slider to enable me to set any charge current. I also use the same node red to enable me to use the relay toggles within the VRM to change the charge current to different fixed numbers for any time i dont want to login to node red dashboard to access my slider. If your interested to know more let me know and ill post how i did it.

[Jose]

It’s interesting, I’ll be looking forward to your post as you did.

[nihonjin98]

Here is what i did:

1. Esnure MQTT broker is turned on in Cerbo GX
2. Ensure you have node-red image loaded on your cerbo gx ie large image os
3. Create a slider node and set the min and max rage as per your Max Charge rate already set using the configuration file from VE Config.
4. Add a function node after the slider to format the slider msg.payload to send “value: msg.payload”
5. Add an MQTT out node to receive the formatted msg.payload to the correct topic ie for me it was W/put your VRM portal ID here/vebus/276/Dc/0/MaxChargeCurrent (note the W at the begining of the topic and not the usual N. W is needed for write permissions N give read only.
6. Deploy and Test

[Jose]

Thank you

[Jose]

After trial and error it worked