[RFI] Growing RFI problem from SolarEdge systems

Mike Kirkland radio.ns6q at gmail.com
Sun Nov 12 15:30:43 EST 2017

To be specific the solaredge optimizer device has to be removed from the
back of the solar panel.

On Nov 12, 2017 12:28 PM, "Jim Brown" <jim at audiosystemsgroup.com> wrote:

> On 11/12/2017 12:07 PM, Mike Kirkland wrote:
>> Actually the FCC has proved turning the system off is ineffective at
>> eliminating the interference and the system must be disassembled.
> Interesting -- the question is, HOW and WHAT was turned off? There are (at
> least) two components/functions of solar power systems that can generate
> RFI. One is charge regulation, which prevents batteries from being
> overcharged. Another is power inversion from DC to AC.  In both cases, it
> is failure to suppress the generation and radiation of RF components of
> pulsed currents and rectangular waves. It is quite well known that
> excessively fast rise times, poor circuit design, and poor
> wiring/installation techniques increase the strength of these components
> and cause them to be radiated.
> If, for example, inverters were turned off but charge regulators were
> still functioning, they could still be generating noise.
> Another possibility is that improper bonding by the installation company
> might be causing noise present on the mains power system to be radiated.
> QST published an interesting piece a few years ago detailing the heroic
> efforts required to suppress a really bad system.
> 73, Jim K9YC
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