SolarEdge Inverter Mysteriously Switching to Cellular

[soby]

For the second time ever, my SolarEdge SE7600A-USS20NHB2 StorEdge inverter has somehow switched from basic Ethernet LAN communication to Cellular. The system was operational on 2/11/2020 and the first time it ever happened was on 11/18/2020. It just did it again this morning and each time I've had to use the button on the inverter to manually switch back to LAN. The Cellular SIM isn't activated so I am alerted to the issue when I can no longer monitor the system from the app or web.

Has anyone else experienced something like this or know what could trigger the switch?

[J.P.M.]

What did the installer say when you asked him ?

[soby]

I love how that’s you’re go-to response.

My installer situation is complicated. My original installer didn’t finish the job so I had a second installer finish. No labor warranty and they don’t monitor anything. I have full installer access to my system and SolarEdge provides me tech support when needed. I’m not ready to bring this issue to their attention yet.

Over Christmas, I was unable to change storage profiles for my battery and I called into tech support. They did some firmware updates and it seemed to sort
itself out in a couple weeks.

I just wanted to gauge if this is a common occurrence or just affects my system.

[tryintoshine]

perhaps your home router is resetting or the connection to the internet is temporarily disrupted so the inverter is trying celluar connection as a back up. Yesterday there were a lot of websites and services down and today I have noticed some sites will not load for whatever reason.

[soby]

perhaps your home router is resetting or the connection to the internet is temporarily disrupted so the inverter is trying celluar connection as a back up. Yesterday there were a lot of websites and services down and today I have noticed some sites will not load for whatever reason.

Apparently a crew cut a fiber cable in Brooklyn and disrupted internet for much of the northeast yesterday morning.

I've had internet drops before with no change to the inverter but I can experiment with that. I'm wondering how I can remove cellular as an option. Is there a SIM card I can remove?

[awtoner]

My experience is that SolarEdge inverters will revert to cellular as long as a cellular modem is installed. You would need to (have an installer) disconnect the cellular modem inside the inverter.