I don't have mine yet. But, I don't think it has Ethernet capability. These type of large, fixed network devices really would benefit from having a good ol' RJ45 port. I have Rheem hybrid water heater that would be a lot better if it wasn't WiFi only.maybe try a hardwired connection to the unit?
To the OP: I thought in some of these FCSP connection trouble threads that the people were able to charge the vehicle without being connected through the app? You cannot get the CSP to charge at all?