Solax X3 Hybrid Raspberry RS485 USB -> Unknown error occurred

[Mike5229]

Hello,

I just can't get the connection via Modbus to work.

The following setup:

Raspberry 4

OS: Dietpi

RS485 to USB adapter: https://www.amazon.de/Greluma-...B09P8CX69G?tag=pvforum-21

Network cable from COM to USB converter. Blue to A and blue/white to B

Solax X3 15.0 Firmware: 43 09 42

I use Home Assistant with HACS and the addon from Wills: https://github.com/wills106/homeassistant-solax-modbus

So far everything has worked, but when I start the integration in Home Assistant and make the Modbus setting, I always get a meaningless error message. (See pictures)

I have set the baud rate to 9600 on both the Solax and the Raspi as a test. The error remains.

Modbus channel is definitely 1

The USB stick is mounted by the Raspi as /dev/ttyUSB0

What am I doing wrong?

[helge26]

Same problem here. Removed entity before update as suggested. When the error occurs, removed integration and reinstalled, but error remains.

The log is about

File "/config/custom_components/solax_modbus/config_flow.py", line 193, in _next_step_battery
    if user_input["support-battery"]:
       ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
KeyError: 'support-battery'

My environment:

• QCells hybrid inverter (Solax compatible)
• USB-RS485-adaptor from BerryBase.de as device /dev/serial/by-id/usb-1a86_USB2.0-Ser_-if00-port0
• Raspberry 4B 8GB with Home Assistant OS 12.4
• Home Assistant Core 2024.08

Helge

[vaskevics]

Can confirm that. Was working just fine before update. Tried to go back to 2024.08.4 but still the same error. Probably, if I did not remove the device before update, it would still work.

[ruimmsimoes]

I’m having the same issue when adding a SolaX inverter after upgrading to 2024.08.08

[butvoo]

I have the same problem,

1. I have NOT removed Solax inverter from Solax Modbus integration :-(
2. upgraded Solax Modbus to 2024.8.8
3. I am not able to add Solax inverter, it error "Unknow error occurred"

Could you please help with break-fix to onboard Solax inverter back?
meantime before the fix is applied, is it possible to downgrade to a working previous version?

[butvoo]

Workaround that works 👍 is

1. add (fake) integration as TCP/ Ethernet
   

2. any temporary IP address can be used:
   

3. inside integration > 3dots > "Configure" > Change to "Serial" > Submit> Serial port name> Baudrate > Submit> ShutDown or Restart HA

After restarting it loads Solax with the use of Serial

[wills106]

I have released 2024.08.11 which fixes an error with Serial connection.

[vaskevics]

Thank you for your effort in investigating and patching! Can confirm that the problem is gone. Removed entity, installed update and added inverter back and things are working just fine. 👍👍👍

[Mike5229]

The Problem ist solved with Version 2024.08.12!
Thanks!!!

[marcin85]

problem is still here..