[RFI] SolarEdge Finds New Source of Solar System RFI

Roger (K8RI) k8ri at rogerhalstead.com
Sat Jun 8 08:58:49 EDT 2019

Having been involved with the semiconductor industry since early 
1961with everything from poly crystal Silicon growth, single crystal 
production, to device production at the experimental, impurity problems, 
analysis of chemicals involved, as well as the maintenance and 
development of that equipment, I can think of many possibilities that 
would cause noise generation in individual solar cells.

73, Roger (K8RI)

On 6/1/2019 5:59 PM, Tony wrote:
> All:
> I recently spoke with an engineer from SolarEdge who said that they 
> discovered a previously unknown source of RFI which turned out to be 
> the solar panels themselves. They found that the panels were producing 
> noise while physically disconnected from the system at a few 
> installations.
> They are now working with the panel manufacturers Hanwha and Trina to 
> determine why a certain batch of their panels are producing RFI. The 
> goal is to locate installations with the defective panels and replace 
> them.
> Cumulative RFI from multiple panels is apparently enough to cause 
> serious RFI and may be the reason why my neighbors installation still 
> makes noise during  the day while the system is turned off. It could 
> also be the reason why the choking the Optimizers had little effect.
> Tony -K2MO
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Roger (K8RI)

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