Battery SOC Sunny Island SI6.0H 399 / SHM 2.0 - Help!

Hello experts,

I am desperately trying to read out the state of charge of my battery. I have an old Sunny Island SI6.0H 399 without a web interface and can currently only query the consumption / feed-in from the grid from the SHM2.0 via the SMA add-on and the consumption via my solar system via Elgris SmartMeter. But so far I can’t access the battery (BYD). What can I do?

Hi
I have a similar problem with my SI4.4M-11 877 and also interested in a solution.
Maybe it can be do with the SMA Developer Portal https://developer.sma.de . If I found some time, I’ll try to catch the data with them.