Node-RED changing ESS mode

Node-RED
, ,
1

Hello, I am using Node-RED to connect to VRM and retrieve the next day’s solar production forecast for my home. I want to set the battery to charge at 1 AM if the production is below a certain value. In the Cerbo GX GUI, I see four options under ESS - Mode:

  • Optimized (with BatteryLife)
  • Optimized (without BatteryLife)
  • Keep batteries charged
  • External control

Using the node “@victronenergy/node-red-contrib-victron”, there is an ESS Control Mode node. I select Venus settings - ESS mode, and three options appear. However, none of them is “Keep batteries charged”.

I understand that what I propose is correct: setting the mode to “Keep Batteries Charged” at 1 AM and then switching it back to “Optimized (with BatteryLife)” a few hours later. Please let me know if this is not the right approach. To do this, the only thing I can think of is using the Custom Control node, selecting com.victronenergy.settings and then /Settings/CGwacs/BatteryLife/State. However, I’m unsure about what values should be set here. I don’t find the official documentation.

Could someone help me?

Thank you very much!

1 Like
2

I use Grid setpoint

image
image1040×255 19.1 KB

3

image
image1908×898 82.5 KB

Finally I got it.

At 11PM I read from VRM the solar prediction for the next day. I store the kWh value in a variable.

At 1AM, if the prediction is below 25kWh, I set the ESS State to 9.

I’m reading the SOC of the battery and storing it to an another variable.

And finally, each 15 minutes, I check if the battery is at 99% and ESS State in 9. If this happens, I set the ESS State to 1.