Most newer solar inverters can't even be set up without internet and most functions are only available with an always-on internet connection. This is also true for EU companies like SMA for example.
I just installed a Fronius inverter (made in Austria) and 6.8kW of panels.
The inverter itself functions perfectly fine without an internet connection, and will display instantaneous power output on the screen. I could just be content with that and look at my monthly power bill to see how much I generated and how much I used each month and never connect it to the internet.
To get any kind of data logging & history from the inverter, it must be internet connected (wifi or ethernet). And all of that is through the manufacturer's website, which constantly nags me to "upgrade to pro" for some obscure feature that I'll never use.
