SolarEdge Modbus Multi - Switching from WiFi to LAN, doesn't connect anymore

Third party integrations
1

Hello,

1 month ago I had my solar system installed, at that time I configured the inverter connection with WiFi because I did not had alternatives. I was able to enable the ModBUS TCP on the inverter and configure the HA integration without issues, and from that I started collecting data.

From then, I had the time to wire a proper LAN connection and switched the inverter connectivity from WiFi to LAN, forcing the inverter to “forget” the WiFi credentials so that now only LAN connectivity is available.

The LAN connection is working fine, from the SetApp I can see it is connected to the Monitoring service and also I can see the device connected in the router interface.

While the GitHub - WillCodeForCats/solaredge-modbus-multi: Modbus/TCP local polling to one or more SolarEdge inverters. For single inverters, multiple inverters, meters, and batteries. integration was working very fine with WiFi connectivity, now that I simply switched to LAN connectivity it does not work anymore:

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I tried to reboot the inverter, I tried to reboot the router, I tried to reboot HA, I opened the SetApp in order to first disable and then enable again the ModBUS, nothing seems to solve the issue. Also tried to remove the configuration from HA and setup it again.

Also from here GitHub - binsentsu/home-assistant-solaredge-modbus: Home assistant Component for reading data locally from Solaredge inverter through modbus TCP I understand that WiFi should be the most problematic for this kind of connection:

We have seen several issues in the past, where the Integration was not able to connect to the inverter on Wifi-based setups. Back then, it seems that SolarEdge has changed something in their firmware and was later fixed in a specific firmware version. According to the feedback of some other users, it seems, that SolarEdge is going to remove the ability to establish a Wifi Connection to the Modbus interface completely in some future firmware versions.

It seems I’m getting the opposite issue here… I’m was very good with WiFi, and now that I switched to LAN I’m having issues.

Are you aware of any kind of issue about this? It would be very sad be forced on remain on WiFi connectivity while I have a more stable LAN connection now.

It seems very odd that this ModBUS may work only with WiFi.

I already scouted these topics but I did not find anything for my issue:

Thank you

2

Elephant in the room: Is the IP correct for the lan connection?
It will have changed when you changed from wifi to lan.

3

I was sure about the IP address but given that I’m out of ideas I checked again anyway.

This is the reference from the SetApp page

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This is from the SetApp page where you can see that ModBus was and is enabled

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This is from the FritzBox router where I forced the DHCP to alway assign that IP, to avoid any IP lease issue

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And this is from the HA integration:

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4

Have you tried doing a cold restart of your inverter after removing the wifi configuration?

  1. Turn P/1/0 switch to 0 and wait until green LED starts blinking
  2. AC off
  3. Check that LEDs are off
  4. AC on
  5. P/1/0 switch back to 1
5

Yes I did, Unfortunately no changes

6

Did you get this working, as i am looking to do the same shortly ?

7

I had a lot of time invested with Solardedge support, they ended up asking a video where I’m showing both SetApp interface so they can see how the inverter is connected and the computer screen where I can show how the ping or the telnet/namp on 1502 works.

The very strange behaviour that based on their own documentation, ModBUS should be working ONLY with ethernet and NOT WiFi, while in my case I’m having exactly the opposite.

Right now after all the provided evidence and video, they decided to send me a new communication board for the inverter (currently in travel in these days) that I will need to change.

My guess is that having configured the inverter from scratch with WiFi instead of using Ethernet directly from the start has somehow set up unexpected modes of operation. Not a lot of sense, I agree, but after all these weeks I’m out of ideas…

Now that they are sending me the new board I will probably also do a factory reset at the same time so that I can start all over again and only use the LAN

8

Well it seems i may be following you as ive just set up wifi to check out the integration, while waiting for my installer to replace a broken inverter and add my lan connection.

I was wondering if the LAN and wifi and HA are on different subnet of the router ?

9

Same LAN, I have a Fritzbox router, same LAN an WiFi provided by the same router

10

Okay cheers, i should be able to test my switch before end of march, will report back if i too get problems