This is a hassio addon to monitor voltronic axpert inverters.

The inverter is connected by USB and data is published as JSON to an MQTT broker. It publishes the data to 3 topics:

• 'power/axpert' for the parallel data (some of these values seem to be only for the connected inverter even though they are returned by the parallel data command)
• 'power/axpert_settings' for the configured settings
• 'power/axpert{sn}' for the data from the connected inverter (configurable, {sn} is replaced with the serial number of the inverter)

You can then configure the sensors in Home Assistant like this:

sensors:
  - platform: mqtt
    name: "Power"
    state_topic: "power/axpert"
    unit_of_measurement: 'W'
    value_template: "{{ value_json.TotalAcOutputActivePower }}"
    expire_after: 60

See the following functions in monitor.py for the values published on each topic:

• power/axpert: get_parallel_data
• power/axpert_settings: get_settings
• power/axpert{sn}: get_data

Install

Add https://github.com/bennieswart/home-assistant-addons to the addon store repositories and you will get a Axpert Inverter listed there. Note that this assumes the inverter is /dev/hidraw0. If you have other USB to Serial devices connected this might be wrong.

Manual build and run

# Build the docker image
docker build --build-arg BUILD_FROM=alpine -t axpert-monitor .

# Run the container
# You will need to edit options.json or add the proper environment variables
docker run                                     \
    -dit                                       \
    --name axpert-monitor-0                    \
    --device /dev/hidraw0:/dev/hidraw0         \
    -v $(pwd)/options.json:/data/options.json  \
    -e MQTT_CLIENT_ID=axpert0                  \
    --restart unless-stopped                   \
    axpert-monitor

Known working configurations

• Two Kodak OG-PLUS6.2 in parallel running on Raspberry Pi 4.

Resources

A description of the serial communication protocol can be found in docs/protocol.pdf.

Credit

This project was forked from MindFreeze/hassio-axpert after it was deprecated.