Well, yes, every device with active electronics does put some noise onto the AC
mains and that noise will always be radiated.
But there is no certainty that the noise will be radiated at a level strong
enough to hear, so it is not really correct to think that SE equipment is
radiating from the AC mains.
Ed
From: Jim McCook <w6ya@cox.net>
Sent: Friday, December 16, 2022 12:02 PM
To: Hare, Ed, W1RFI <w1rfi@arrl.org>; RFI List <rfi@contesting.com>
Subject: Re: [RFI] Another Solar Panel RFI System
It's interesting to hear that Solar Edge is actually radiating from the house
wiring, if only in part. It's still radiating from house wiring, so who knows
where the main source of that interference is at, say, a distance of 500 feet?
I have lost all support by Solar Edge for the huge numbers of interference
sources that now come from all directions. We had reasonably good support
before TJ was promoted. Then, nothing. I can't even count the number of SE
interference sources. I've tracked some from over 1500 feet away.
Besides the many sources of non solar HF interference we identify coming from
homes, I still struggle with noise from a pool pump next door that uses a
multispeed DC motor. Besides the radiation that can be seen at the power
supply (obviously switching) I tracked that noise all through the house with
the usual hot and hotter spots adjacent to house wiring. Yet I was told that
there is no support for such interference under 30 MHz. It clearly radiates
from the house wiring "antenna." Another adjacent neighbor is in the process
of putting in a swimming pool, so I can hardly wait to see what new
interference will appear that will not be addressed by FCC because of its
"rules." When trying to get help for the pool pump noise I was told by FCC
that "I can still use my radio." Ask me why I'm bitter toward FCC. Complaints
have become futile.
73, Jim
W6YA
On 12/16/2022 7:53 AM, Hare, Ed, W1RFI wrote:
As near as ARRL's work can tell, the interference from Solar Edge equipment is
not being significantly radiated from house AC mains. W1VLF has used a probe
to sniff the wiring of a Solar Edge system at his house and found that the
emissions from the solar-panel wiring were much greater than the emissions from
the AC mains.
We do NOT want to hang this issue on compliance with the Part 15 emissions
limits because if the FCC were to see that as the line in the sand on harmful
interference, then systems that comply with the limits would be pronounced to
be clean by the FCC and cases would be closed. To file a complaint about
emissions limits, amateurs would have to make measurements, which in the case
of a multi-kW inverter, would be well beyond the ability of even most test labs.
Cases of interference from Part 15 and Part 18 devices are being resolved on
the basis of harmful interference.
For lower-powered consumer devices, we DO find devices that exceed the limits,
and ARRL is setting out to obtain and measure more of these devices and report
them to the FCC. If a device exceeds the limits, then that is a rules
violation even without the presence of harmful interference. Our AM-broadcast
connections are very interested in this, because many devices that meet the
limits on 1.8 MHz and up do not meet the limits in the AM broadcast band.
Those that fail on the AM broadcast band also fail on 630 meters, which ARRL
does have standing to form the basis of a complaint.
Ed, W1RFI
ARRL Lab
________________________________
From: RFI
<rfi-bounces+w1rfi=arrl.org@contesting.com><mailto:rfi-bounces+w1rfi=arrl.org@contesting.com>
on behalf of Jim McCook <w6ya@cox.net><mailto:w6ya@cox.net>
Sent: Thursday, December 15, 2022 8:54 PM
To: RFI List <rfi@contesting.com><mailto:rfi@contesting.com>
Subject: [RFI] Another Solar Panel RFI System
All the RFI problems I've seen from neighbors have been solved by
isolating the problem device from the line with an adequate EMI filter
from Corcom. One LED strip lighting problem was solved only by changing
to a analog power supply. How many sources of RFI are there that DO NOT
utilize the house wiring, at least partially, as the radiating antenna?
Can it be proven that RFI below 30 MHz from solar installations is ONLY
from direct radiation and not from house wiring? I would like to see
some proof.
Jim W6YA
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