This is a hassio addon to monitor pylontech batteries.

The battery is connected by RS232 and data is published as JSON to an MQTT broker. It publishes the data to the following topic:

• 'power/pylon' for the data from the master battery and slaves

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

sensors:
  - platform: mqtt
    name: "Battery1 SOC"
    state_topic: "power/pylon"
    unit_of_measurement: '%'
    value_template: "{{ value_json[0].Coulomb }}"

See the function get_power in monitor.py for the values published on power/pylon.

Install

Add https://github.com/bennieswart/home-assistant-addons to the addon store repositories and you will get a Pylontech Battery listed there. Note that this assumes the battery is /dev/ttyUSB. 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 pylon-monitor .

# Run the container
# You will need to edit options.json or add the proper environment variables
docker run                                     \
    -dit                                       \
    --name pylon-monitor                       \
    --device /dev/ttyUSB0                      \
    -v $(pwd)/options.json:/data/options.json  \
    -e MQTT_CLIENT_ID=pylon0                   \
    --restart unless-stopped                   \
    pylon-monitor

Connection

You will need a pylontech console cable (RS232) to connect the master battery to your monitoring device's USB port. This code only supports RS232 communication and will not work with RS485.

Known working configurations

• Four Pylontech US3000C running on Raspberry Pi 4.