[RFI] FW: After 40 years of searching, scientists identify the key flaw in solar panel efficiency

[Roger (K8RI)]

More correctly, "Some" panels "may" create RFI and that appears to be 
related to batches from specific fabricators.
I would think it might be possible to create an antenna, SA combination 
to "Preview" new panels before they are connecte, but exposed to bright 
sunlight.

However, based on what I've read so far the problem cells come from a 
specific fabricator and may be used in several brands of panels.  Based 
on that, I'd think noisy panels (cells) might be uncommon, but certainly 
worth evaluating panels before connecting.

So far, I've found nothing indicating the actual near field signal 
strength of these faulty panels

73, Roger (K8RI)

On 6/12/2019 4:02 PM, Grant Saviers wrote:
> This article is way above my pay grade, but does show that Si panels 
> create RF noise.  How much above the top frequency limit of 100Khz 
> shown in the chart may or may not be a problem.  However, put enough 
> panels together and perhaps it is.
>
> https://www.nature.com/articles/srep29685
>
> It wouldn't seem to be too difficult to measure a plain panel with an 
> E-field sensor or antenna on a spectrum analyzer.
>
> Grant KZ1W
>
> On 6/12/2019 12:32 PM, Tony wrote:
>> On 6/12/2019 3:19 PM, EDWARDS, EDDIE J via RFI wrote:
>>> There was a recent RFI group exchange on this list regarding 
>>> possible ways that the cells themselves could create some RFI 
>>> issues. But I don't think this was based on anyone's findings in the 
>>> field.?? Just speculation.
>>
>> Ed:
>>
>> SolarEdge engineers discovered that the panels themselves were 
>> generating RFI at several locations. The noise was detected while the 
>> panels were disconnected from the system.
>>
>> Tony -K2MO
>>
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-- 
Roger (K8RI)