Hi Wolfgang, Yes it sounds like you should be able to use SBFspot if you can connect to your inverter with Sunny Explorer via bluetooth. I am not familiar with your Inverter.
I usually find the bluetooth Mac using my mobile phone bluetooth connection (Sunny Explorer doesn’t list the BT mac that I have seen, ALSO make sure Sunny explorer is NOT running, you can’t have 2 connections to the inverter). Just scan for BT devices on your phone while standing near your inverter and you should be able to find the MAC in the list. Your inverter should have a Blue BT led light up if you actually connect to it.
The Bluetooth password for SBFspot will the be the same as your sunny explorer password.
The Readme on the addon or github is good place to start for setup instructions.
The other main thing you really need is the MQTT Addon and also Integration, and a dedicated User/password for MQTT, that is not your Homeassistant MQTT user. Homeassistant needs it’s own User that cannot be used for SBFspot. MQTT explorer can be useful for troubleshooting here.
Once you have MQTT working and sending data, you should be able to change the SBFspot options to create Sensors and they will be adding to Homeassistant. It is important that MQTT works prior to trying to create sensors as SBFspot needs MQTT working to detect your inverters serial number to create the correct sensors in homeassistant.
Once you have connected SBFspot to your inverter over MQTT, you can setup mariaDB database for SBFspot data storage and PVoutput if you want.
Hope that helps and happy new year.