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Re: [RFI] Covering Solar Panels To Assess RFI

To: Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Covering Solar Panels To Assess RFI
From: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Tue, 25 Aug 2020 19:15:52 -0600
List-post: <mailto:rfi@contesting.com>
Inverters are inherently noisy.   So you replace a noisy one with another
noisy one.  You cover the panels so the inverters have nothing to invert.
That doesn't mean the solar panels are the culprit.  Plain old solar panels
are very quiet, at least all of my 8000 watts sure are. It's all the other
stuff that causes the noise.

On Tue, Aug 25, 2020 at 6:44 PM Tony <dxdx@optonline.net> wrote:

> All:
> The the inverter on my neighbors solar panel installation was recently
> replaced to reduce the RFI caused by the system. The swap only made a
> slight change in the interference.
> This left the solar panels as the possible source of RFI so my neighbor
> and I conducted a test we've done previously which involves covering
> each panel with tarps to see what affect it would have on the noise.
> We found that the RFI completely disappeared while the tarps were
> blocking the Sun from reaching the panels. The noise returned when we
> removed the tarps.
> I reported this to SolarEdge and they now believe that the panels are
> the cause of the interference. They mentioned 2 other installations that
> had this same problem with panels that were manufactured in China by
> Hanwha and Trina.
> The takeaway is that solar panel systems need to be checked from top to
> bottom when checking the system for interference. I'm hoping SolarEdge
> will keep this in mind when they address their next RFI case.
> We also reported our test results to the company who leases the panels
> to my neighbor. No response yet.
> Tony-K2MO
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