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Re: [RFI] Question for the group...

To: rfi@contesting.com
Subject: Re: [RFI] Question for the group...
From: K9MA <k9ma@sdellington.us>
Date: Thu, 1 Jan 2026 11:02:19 -0600
List-post: <mailto:rfi@contesting.com>
If your neighbor's system is from Generac, that's very bad news. Several of my nearby neighbors have Enphase and AP Systems microinverter systems, from which I've detected no RFI. The neighbor immediately next door, 60 feet from my tower, as well as my own Enphase system, have single-turn ferrite chokes on the wiring, but I don't know if that was necessary.

As far as Part 15, there is that note: "...may not cause harmful interference." Does that apply to devices which have no AC line connections, and hence no conducted emissions limit?

73,

Scott K9MA

On 12/31/2025 8:13 PM, Dave (NK7Z) wrote:
I have a neighbor getting ready to install Solar, he lives about 600 to 1000 feet from my home.  He is very cooperative, and had contacted the vendor.  I will be running tests prior to turn on.

I want to insure I have my ducks in a row for this, in the event it turns sour.  I will run a spectrogram from 3-30 MHz, via my SDR to get a baseline before the Solar system goes live.

Just to be sure, solar does fall under part 15?  Is that correct?

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

Random Quote of the day:
What did one charged atom say to the other? I got my ion you



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Scott  K9MA

k9ma@sdellington.us
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