[RFI] RFI when solar array is switched off?

[Tony]

Mike:

I have firsthand experience with a neighbors Solar Edge system and I can 
tell you that it does not generate noise once the system shuts down at 
night.

This video shows a comparison between the nighttime vs. daytime RFI 
generated by the system. https://www.youtube.com/watch?v=ukzIIn-Lg4c

It does generate carriers every 100 kHz on 20 meters and above 
regardless of whether the system is on or off. The carriers are 14098, 
14198 on 20 meters.

This is typical of Solar Edge systems in my area. My advice is DO NOT 
INSTALL SOLAR without a signed agreement with the manufacturer / 
installer regarding RFI.

My neighbors system is 150 feet away from my antennas and it generates 
the S-9 plus noise illustrated in the video. I can't imagine what it 
would be like if installed at my home.

Tony -K2MO



On 1/3/2023 12:19 PM, nlsa at nlsa.com wrote:
> Dear friends,
>
> I have a question about the "off" state of PV arrays.  If a solar array
> generates RFI when it is on, does it stop when the array is turned off?
>
> I suppose that the answer depends on several factors:
>
> *	type of array (string inverter vs microinverter)
> *	definition of "off"
> *	mains disconnect status
>
> I'm asking because my family is considering a pretty big array.  I don't
> know in advance whether its RF emissions will be troublesome to my 2m EME
> system but I assume the worst.  However, if I can throw a switch that
> RF-silences the solar array while I'm operating, then the problem
> disappears..
>
> Thanks -
>
> Michael, W9IP
>
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