Perhaps I missed some previous info shared, but it sounds like the system
is installed and working. How much interference?
had a 25kW SolarEdge system installed at my home early this year. Here
are some things that I learned :
* The installers, although generally well-intentioned, had no
understanding of what EMI is, why it is significant, how it is generated and
propagated, or how to mitigate it.
* Installers (Management and field personnel) had no interest in
becoming better informed about RFI. Just git 'er done.
* Engineers at SolarEdge were better-informed but the lack of
background among installers meant that engineering recommendations were only
partially implemented.
* The Installers just do what they are told (more or less) by their
supervisors whose training is in solar PV systems, not RF.
* Some of them did not even know what amateur radio is.
*Best 73 de WA2SQQElmwood Park, NJ"The only dumb questions are those we
don't ask"*
On Wed, Jul 17, 2024 at 12:00 PM <rfi-request@contesting.com> wrote:
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> Today's Topics:
>
> 1. Re: Solar Panel RFI Update From K2MO: July 17, 2024
> (David Decoons)
> 2. Re: Solar Panel RFI Update From K2MO: July 17, 2024
> (nlsa@nlsa.com)
> 3. Re: Following up with Solar Edge (Dave (NK7Z))
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 17 Jul 2024 05:39:50 -0400
> From: David Decoons <rocketnj@gmail.com>
> To: Tony <73guddx@gmail.com>
> Cc: rfi@contesting.com
> Subject: Re: [RFI] Solar Panel RFI Update From K2MO: July 17, 2024
> Message-ID: <456C1BE2-3E73-4BBC-9F82-FD9299D472C4@gmail.com>
> Content-Type: text/plain; charset=utf-8
>
> I doubt you would be able to find out, but curious what mix ferrites they
> are using?
>
> Wrong mix would have very little effect at certain HF frequencies.
>
> 73
> Dave wo2x
> Sent from my iPad
>
> > On Jul 17, 2024, at 1:45?AM, Tony <73guddx@gmail.com> wrote:
> >
> > ?All:
> >
> > I was able to take a close look at my neighbors solar panel installation
> with the panels removed and found that the cables that feed the panels were
> fed straight through the ferrite clamp-ons without ANY turns around the
> core. Most of that cabling was not twisted around itself either.
> >
> > The lack of cable turns around each ferrite core has to be reason why
> the suppression had little effect on the RFI the system produces. I also
> found the ferrite they used on the installation and there appeared to be 2
> dozen large and small clamp-ons for 28 solar panels.
> >
> > The installers are scheduled to be here today (July 17th) so I'll have a
> chance to speak with them and watch how they reinstall the system.
> >
> > I was going to attach the pictures I took, but I don't believe this
> reflector accepts attachments?
> >
> > If anyone is interested, I can send them direct.
> >
> > Tony -K2MO
> >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 17 Jul 2024 05:55:58 -0400
> From: <nlsa@nlsa.com>
> To: <rfi@contesting.com>
> Subject: Re: [RFI] Solar Panel RFI Update From K2MO: July 17, 2024
> Message-ID: <001501dad82f$86d4da90$947e8fb0$@nlsa.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear friends,
>
> I had a 25kW SolarEdge system installed at my home early this year. Here
> are some things that I learned :
>
>
>
> * The installers, although generally well-intentioned, had no
> understanding of what EMI is, why it is significant, how it is generated
> and
> propagated, or how to mitigate it.
> * Installers (Management and field personnel) had no interest in
> becoming better informed about RFI. Just git 'er done.
> * Engineers at SolarEdge were better-informed but the lack of
> background among installers meant that engineering recommendations were
> only
> partially implemented.
> * The Installers just do what they are told (more or less) by their
> supervisors whose training is in solar PV systems, not RF.
> * Some of them did not even know what amateur radio is.
>
>
>
> 73,
>
> W9IP
>
>
>
>
>
> -----Original Message-----
> From: RFI <rfi-bounces+nlsa=nlsa.com@contesting.com> On Behalf Of Tony
> Sent: Wednesday, July 17, 2024 1:45 AM
> To: rfi@contesting.com
> Subject: [RFI] Solar Panel RFI Update From K2MO: July 17, 2024
>
>
>
> All:
>
>
>
> I was able to take a close look at my neighbors solar panel installation
> with the panels removed and found that the cables that feed the panels were
> fed straight through the ferrite clamp-ons without ANY turns around the
> core. Most of that cabling was not twisted around itself either.
>
>
>
> The lack of cable turns around each ferrite core has to be reason why the
> suppression had little effect on the RFI the system produces. I also found
> the ferrite they used on the installation and there appeared to be
>
> 2 dozen large and small clamp-ons for 28 solar panels.
>
>
>
> The installers are scheduled to be here today (July 17th) so I'll have a
> chance to speak with them and watch how they reinstall the system.
>
>
>
> I was going to attach the pictures I took, but I don't believe this
> reflector accepts attachments?
>
>
>
> If anyone is interested, I can send them direct.
>
>
>
> Tony -K2MO
>
>
>
> _______________________________________________
>
> RFI mailing list
>
> <mailto:RFI@contesting.com> RFI@contesting.com
>
> <http://lists.contesting.com/mailman/listinfo/rfi>
> http://lists.contesting.com/mailman/listinfo/rfi
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 17 Jul 2024 06:02:31 -0700
> From: "Dave (NK7Z)" <dave@nk7z.net>
> To: rfi@contesting.com
> Subject: Re: [RFI] Following up with Solar Edge
> Message-ID: <71480ceb-d7f3-4e13-bc92-24ee751f9924@nk7z.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Hello Bob,
>
> THANK YOU for taking the time to coordinate with the ARRL. That action
> on your part, helps all of us in this.
>
> The ARRL has communications paths we do not, and they know how, and when
> to use them. I assist other hams in the area with RFI issues, and when
> an issue starts to boil to the surface, (as your is), I always bring in
> Steve Anderson at the ARRL lab. He is knowledgeable, helpful, known in
> the industry, and his calm approach normally gets action.
>
> Again, thank for involving the ARRL lab in this...
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 7/16/24 13:35, Bob Kozlarek WA2SQQ wrote:
> > I am going to coordinate the e-mail I received, and my response with the
> > ARRL. What Inwas surprised at was that Solar Edge admitted that they had
> > little experience in thee matters. They explained that the company
> > originated in Israel where these problems don?t exist.
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> RFI mailing list
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>
>
> ------------------------------
>
> End of RFI Digest, Vol 258, Issue 4
> ***********************************
>
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