I am about to add solar panels and whole home battery backup solution to my house. I had immediately ruled out Tesla due to the cloud connection / internet requirement and started down the path of Enphase due to the ability to access and control the system 100% locally. But that seems to have very recently changed and now also requires a token system to authenticate with their servers even to access the system locally.
I refuse to pay even $10 for anything that I have to ask permission of someone elses servers to change/control and review systems behind my firewall at my own location.
What battery systems do I have as an option that will work with Home Assistant without a cloud/internet connection and authenticating to servers that are not “me”.