Well I spent ALL day with SS and after many issues with the crapy DONGLE they changed some settings (from the prior tech) and it was my lucky day with them, it started working on-grid "kinda".... While it is using the AC coupled solar panels and selling unused power back to grid, it has a relay that keeps tripping on-off every 4 seconds while the green "Normal" light goes on and off.
They are escalating to their experts for resolution. I'll give them the courtesy of finding a solution before I get EG4 in the loop. For now I disabled the AC/C as that seems to stop the relay loop.
I will update this post as go along with this issue, in case someone else gets unlucky with the same setup.