Just a WAG--my 2013 SolarCity 16 kW (64 panel) PV system has 4 SolarEdge inverters. They have Zigbee communications gear inside. I was provided with a small (like 3x3x1") box to connect to Ethernet/Internet. This is a Zigbee-to-internet communicator. The data flows through SolarEdge servers and to Tesla. You should be able to use your iPhone/Android Tesla app to see your PV system output (global, additive) assuming your SolarCity/Tesla PV system is added to your Tesla account. Call the Tesla Energy support line and dial your way through the phone tree to get support for an existing solar system. Have the inverter model/serial numbers available. While on the phone, get the Tesla rep to allow you full SolarEdge access. You will get a username/account for SolarEdge. You then log into SolarEdge and set up your account. If the inverters and system have been provisioned properly, you see somewhat more granular information on your system. You can also use the SolarEdge iPhone/Android app to monitor your system.
And for extra credit, once all of the above is working, call SolarEdge and ask them to let you see all of your system's data. Then you can see panel specific info (output, etc) and monitor things in greater detail.