Inverter Wifi reception issues
Hi all!

My first post and a problem of course :)

I have a H1-6.0-E-G2-WL inverter which connects to my wifi. The inverter is on an outside wall and an AP is on the inside of that wall right next to it.

The inverter is using an integrated wifi card/antenna, there is not a dongle on the bottom, and the reception is appalling .- -75dB to -80dB which means it is constantly disconnecting and reconnecting.

If I connect to the same AP on my mobile phone whilst stood next to the Inverter I get a pretty strong -50 to -60dB and there is also a Tigo panel data logger which has a solid connection. The inverter just cant seem to get gfood signal for some reason.

I am wondering if plugging in a wifi dongle would help, as maybe the internal antenna being located inside the metal box is causing the issue.

Would this work ? Will the inverter then have 2 Wifi interfaces and pick the best one? or will I need to configure it to use the dongle and not the integrated antenna..?

Can any one help please?

Thanks for any help!! 8-)
Re: Inverter Wifi reception issues
First check your installer has fitted the WiFi antenna on the underside of the inverter.
Screenshot 2026-06-16 at 12.56.51.png
If it has been installed and the connector for it is a standard reverse-SMA connector then you could either try a different antenna or use an extension cable to re-locate it slightly away from the inverter. Just make sure the connections are weatherproofed if outdoors.

TBH the positioning of the antenna on the inverter is not ideal as there is bound to be some shielding of the signal due to all the other cables that area. Even with the external dongle on a G2 I'm seeing 20dB difference in signal level between the inverter and that from a Zappi EV charger three feet away.
H1-3.7-E-G2, 2xEP11-H and 6Kw solar
Manager(ARM):1.76
Master:1.57
BMS:1.012
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