Getting Ginlong Solis invertor data and posting on MQTT / PV output.

Using a docker image as a service to read the invertor via the RS485 port.

The measurements are send to mqtt every 5 seconds, and to PV output every 5 minutes.

• RS485 to USB converter.

Connecting the converter straight to the invertor.

The pins are a little bigger that standard breadboard, you need something that would fit.

I used the wires of the female side of a PCI-E power connector and compressed it a little.

The connector pins on the Solis invertor are tagged with a number, just take a close look.

version: "2.1"
services:
  ginlong:
    image: bram2202/ginlong-solis-mqtt:latest
    container_name: ginlong-solis-mqtt
    environment:
      - USB_SERIAL=/dev/ttyUSB0
      - BROKER_IP=<IP of mqtt broker>
      - BROKER_PORT=1883
      - BROKER_USER=<mqtt user>
      - BROKER_PASSWORD=<mqtt password>
      - PV_OUTPUT_SYSTEM_ID=<PVOutput system ID>
      - PV_OUTPUT_API_KEY=<PVOutput api key>
    restart: unless-stopped
    devices:
      - /dev/ttyUSB0:/dev/ttyUSB0

Its posible to run the script in a service instead of a docker container. Download this repo and install the requirements.

Use pip install

• paho-mqtt
• minimalmodbus
• schedule

vim /lib/systemd/system/pv-script.service

And add: (change path of script folder)

[Unit]
Description=PV output script
After=multi-user.target
[email protected]
[Service]
Type=simple
ExecStart=/usr/bin/python3  <YOUR-FOLDER>/src/inverter.py
StandardInput=tty-force
Restart=always
[Install]
WantedBy=multi-user.target

Reload the daemon:

systemctl daemon-reload

Start the script

systemctl start pv-script.service

Check the status

systemctl status pv-script.service

Start service at boot

systemctl enable pv-script.service

Every topic contains a json with values