[RFI] Solar Panel RFI in Kings Park - Update October 4th 2018

[Hare, Ed W1RFI]

Mike has been in communication with the Solar Edge engineers almost from the beginning, with some of the engineers in Israel.   The "usual" solution has worked in some cases, while in other cases not. In some of the "not" cases, we have found that mistakes in grounding and/or filtering were made.

But if they are putting on chokes without turns of wire, there is clearly some work left to do.

-----Original Message-----
From: Tony [mailto:dxdx at optonline.net] 
Sent: Thursday, October 11, 2018 4:06 PM
To: Hare, Ed W1RFI; Rfi List; Tony Brock-Fisher; Gruber, Mike W1MG
Subject: Re: [RFI] Solar Panel RFI in Kings Park - Update October 4th 2018

On 10/11/2018 2:03 PM, Hare, Ed W1RFI wrote:
> Mike Gruber, I am thinking that we need to get out to that Connecticut Solar-Edge installation and make some 30 MHz radiated emissions measurements.   The devices probably don't exceed the limits for AC-mains conducted emissions <30 MHz, but they may exceed the radiated emissions limits above 30 MHz, which they are expected to meet.

Ed:

That's a wonderful idea. In addition to an evaluation, I think it would benefit us all if the ARRL would collaborate with the RF engineers at Solar Edge. I met them in person recently and they are open to suggestions. Tefford Reed is the senior engineer who assessed the RFI at my location and is now responsible for coming up with a solution.

His assessment was that their usual RFI suppression methods were not enough to eliminate the noise in my case which is why their looking at everything from improved RFI chokes to the infamous RFI absorbing foam.

He can be reached at:
Tefford.Reed at solaredge.com
Tel: 510-772-7821

Thanks,  Tony -K2MO