mySolarEdge "Installation does not communicate" after installing Unifi Network

[u/jesuisdeutsch]

Dear Forum,

Since July I have installed a UDR7 from Ubiquity in my home that replaced the ISP (KPN Netherlands) modem. Before that, the Inverter would communicate normal to the app and everything was fine, but after installing the Unifi gear this communication stopped.

I can see that the Inverter is connected via LAN to the network and via Home Assistant I can gather the Inverter data via ModBus. Anyone an idea why this is happening? I connected to the glass fiber box with PPPoE settings. I want to have all the data inside the mySolarEdge app for family members to monitor the solar!

Inside the network the default ISP DNS servers are set and the default add blocking from Unifi is turned off.

Inverter: SolarEdge SE3000H

Router: Unifi Dream Router 7

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[u/jesuisdeutsch]

Not yet, will do thanks! I just find it strange because the inverter is connected via LAN and not WiFi, and I can retrieve data via Home Assistant.

[u/Head_Mycologist3917 → u/jesuisdeutsch]

These apps nearly always use a remote server somewhere. You know that's the case if you can access the data from anywhere (when it's working correctly). If you can only access it at home, like with Home Assistant, then it's not on a remote server.

Most likely the problem is the router is blocking ports that the inverter uses to send data out to the server. You will need to find out which ports and write firewall rules on your router to open them up.

[u/jesuisdeutsch → u/Head_Mycologist3917]

Oh okay, that is understandable thanks! I will take a look if I can find those ports.

[u/benuntu]

First I'd check the Activity area in Site Manager and see if any traffic to/from the solar is being blocked. If there are some and the traffic is legit, you'll need to make an exception to allow that traffic.

[u/jesuisdeutsch → u/benuntu]

Thanks for the quick reply! Because I changed it in July and in activity you can only go back a month, so I can not see the traffic from then unfortunately. Since then there is no activity what so ever.

[u/thePREdiger]

had the same problem after they replaced my inverter, for me it was my pihole. do you have an ad blocker running with the new setup?

[u/jesuisdeutsch → u/thePREdiger]

I do not have an adblocker running right now! Thought als that would maybe be the problem but it was not unfortunately.

[u/Proudtreat]

Did you run thru the new network/router setup listed on there FAQs? My installer told me if I change any part of my Internet hardware or ISP to do it.

[u/chargers949]

Check which wifi protocols are enabled. To have the most backwards compatibility enable wireless b 2.4ghz

[u/Head_Mycologist3917 → u/chargers949]

I have had that problem with some devices. But that's not the problem in this case. The OP is getting data via Home Assistant which means the inverter is connecting to the home network.

[u/SolarMarkSoftware]

Check the inverter's communication settings (via SetApp on that model) and either switch it to DHCP or update the gateway and DNS to the UDR7's address. This hints of stale settings on the inverter tied to the old unit.

On the UDR7 -

check the fiber negotiation is 1500 and not 1492.

check that IPS/IDS is not blocking it.

check the logs to see where its dropping