[RFI] solar panel filters

Thu Apr 12 19:17:23 EDT 2018

My array is maybe 20’ from the base of one of my 160m inverted L’s and is directly under (by 150’ or so) one 80m inverted v and neither hears anything from the array… of course at night the solar array isn’t producing anything so the inverters shut off.  but the array is about 60’ from the lowest antenna on my 20m stack and it hears nothing during the day.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net <http://wiki.k1ttt.net/> 
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373

From: David Eckhardt [mailto:davearea51a at gmail.com] 
Sent: Thursday, April 12, 2018 23:02
To: k1ttt at arrl.net
Cc: Rfi List
Subject: Re: [RFI] solar panel filters

Ferrites are better suited at reducing RFI at 30 MHz than low HF.  I am far more concerned about 160, 80, and 40-meters, and of course, 20.1 MHz that 30 MHz.  Inverters and built-in or added after the fact optimizers produce less and less energy as the frequency is increased.  Ferrites become less and less effective as the frequency is decreased.  Yes, there are special mixes of ferrites that are effective at lower frequencies, but not easily available from your corner store.  

Dave - WØLEV 

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On Thu, Apr 12, 2018 at 6:32 PM, David Robbins <k1ttt at verizon.net> wrote:

'optimizers' are built into the inverters and are just part of the circuitry controlling the power flow from the panels to the lines.  and not all optimizing inverters are noisy, I have 27 of them here and it took all of 3 ferrites on each one to clean up the little bit of noise I could hear when beaming at the array on 10m.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of David Eckhardt
Sent: Thursday, April 12, 2018 18:07
To: Leonard.Keepers at comcast.net
Cc: Rfi List
Subject: Re: [RFI] solar panel filters

Good luck!!

One bit of advice:  Do NOT incorporate 'optimizers' in your installation.
They have proven to be extremely noisy - even worse than the inverters+
+.  I have contacted a local installer several times for a 'solution' to
RFI.  So far, I've received absolutely nothing in reply.

Dave - WØLEV

On Thu, Apr 12, 2018 at 3:26 AM, LeonardKeepers <Leonard.Keepers at comcast.net
> wrote:

> hello group i am asking if their are filters available for solar
> panels to try and prevent rfi,if so what type and brands and price of such filters.
>
> thank you
>
> Leonard
>
>
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*Dave - WØLEV*
*Just Let Darwin Work*
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Dave - WØLEV

Just Let Darwin Work