dbus-huaweisun2000-pvinverter

dbus driver for victron cerbo gx / venus os for huawei sun 2000 inverter

Purpose

This script is intended to help integrate a Huawei Sun 2000 inverter into the Venus OS and thus also into the VRM portal.

I use a Cerbo GX, which I have integrated via Ethernet in the house network. I used the WiFi of the device to connect to the internal WiFi of the Huawei Sun 2000. Attention: No extra dongle is necessary! You can use the integrated Wifi, which is actually intended for configuration with the Huawei app (Fusion App or Sun2000 App). The advantage is that no additional hardware needs to be purchased and the inverter does not need to be connected to the Internet.

To further use the data, the mqtt broker from Venus OS can be used.

Todo

• better logging
• find out why the most values are missing in the view
• repair modelname (custom name in config)
• possibility to change settings via gui
• alarm, state
• more values: temperature, efficiency
• clean code

Cooming soon

Installation

1. Copy the full project directory to the /data/etc folder on your venus:

   • /data/dbus-huaweisun2000-pvinverter/

   Info: The /data directory persists data on venus os devices while updating the firmware

   Easy way:

   wget https://github.com/kcbam/dbus-huaweisun2000-pvinverter/archive/refs/heads/main.zip
   unzip main.zip -d /data
   mv /data/dbus-huaweisun2000-pvinverter-main /data/dbus-huaweisun2000-pvinverter
   chmod a+x /data/dbus-huaweisun2000-pvinverter/install.sh
   rm main.zip
   

2. Edit the config.py file

   nano /data/dbus-huaweisun2000-pvinverter/config.py

3. Check Modbus TCP Connection to gridinverter

   python /data/dbus-huaweisun2000-pvinverter/connector_modbus.py

4. Run install.sh

   sh /data/dbus-huaweisun2000-pvinverter/install.sh

Debugging

You can check the status of the service with svstat:

svstat /service/dbus-huaweisun2000-pvinverter

It will show something like this:

/service/dbus-huaweisun2000-pvinverter: up (pid 10078) 325 seconds

If the number of seconds is always 0 or 1 or any other small number, it means that the service crashes and gets restarted all the time.

When you think that the script crashes, start it directly from the command line:

python /data/dbus-huaweisun2000-pvinverter/dbus-huaweisun2000-pvinverter.py

Also useful:

tail -f /var/log/dbus-huaweisun2000/current | tai64nlocal

Stop the script

svc -d /service/dbus-huaweisun2000-pvinverter

Start the script

svc -u /service/dbus-huaweisun2000-pvinverter

Restart the script

If you want to restart the script, for example after changing it, just run the following command:

sh /data/dbus-huaweisun2000-pvinverter/restart.sh

Uninstall the script

Run

sh /data/dbus-huaweisun2000-pvinverter/uninstall.sh
rm -r /data/dbus-huaweisun2000-pvinverter/

Examples

Thank you

Contributers

DenkBrettl

Used libraries

modified verion of https://github.com/olivergregorius/sun2000_modbus

this project is inspired by

https://github.com/RalfZim/venus.dbus-fronius-smartmeter

https://github.com/fabian-lauer/dbus-shelly-3em-smartmeter.git

https://github.com/victronenergy/velib_python.git