Aggregate multiple batteries with Node-RED

[mr-manuel]

This discussion should be about how aggregating multiple batteries with Node-RED including screenshits and flows.

@pos-ei-don @xury77 may you have an example to post?

[pos-ei-don]

I am currently out of the country and cannot do this on my cellphone.
My Flow is currently very basic, but it works very well. I am very happy with this plugin!

[mr-manuel]

Could you post it when you are back?

[xury77]

I have to do some tests. In particular, I'm curious about how it works with ESS , but I promise to show my flows and screenshots after Easter time.

[xury77]

I have two batteries connected but not really aggregated
So real aggregations must be something like this: https://github.com/Dr-Gigavolt/dbus-aggregate-batteries/blob/main/aggregatebatteries.py
Now I use Lynx as workaround. Perhaps is be possible to use above method for true aggregate

[teefixx]

I have two batteries connected via Louisvdw serialbattery driver and aggregate them with mr-manuel MQTT battery.

The values are collected via node red and published mostly to global variables. With that concept I have the values available all over nodered. (Flow: Batterien)

After that the values for the MQTT battery are calculated and published as well. A simple function node converts all neede values to a JSON object and publishes them via MQTT (Flow: virtuelle Batterie)

flows are attached as .txt files

Thank you for this great and versatile driver!

Batterien.json.txt
virtuelle Batterie.json.txt

[mr-manuel]

Thanks