Finally up and running.
Tried to install sbfspot on bullseye, fails with errors I did file an issue with sbfspot.
This installed fine on buster, and loads to pvoutput very well.
A questions.
I intend to place the pi next to the the inverter, and ethernet connect to the inverter, and access the pi via wifi or usb2ethernet. Reason, these devices make connections that are not needed.
Are there any caveats to be aware of.
Thanks for the work with sbfspot.