Dear Tony -
Thank you for the pointer to your excellent videos.
Regarding the optimizers... are they shut-down-able or do they always
operate if the solar panels are illuminated?
73,
W9IP
-----Original Message-----
From: RFI <rfi-bounces+nlsa=nlsa.com@contesting.com> On Behalf Of Tony
Sent: Tuesday, January 03, 2023 7:13 PM
To: rfi@contesting.com
Subject: Re: [RFI] RFI when solar array is switched off?
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@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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