[RFI] Considering a solar panel

[Gary Smith]

Jim,

Thank you. And thanks to the others who 
replied on and off list. 

As much as I would like to have a larger 
array for the house, that's not for this 
QTH and a smaller unit is what I need to 
find for my camping needs and I'll be QRP  
(most likely barefoot), in the future when 
out with the camper so lower wattage is 
what's on the griddle. Looking at 
Genasun's higher powered controller for 
12V lead acid, 140W is the max it can deal 
with. While it would be nice to have two 
100W panels, I don't think that'll really 
matter and 140W is plenty.

As it's known to be quiet, I'll order that 
one and now I'll look for the most 
efficient and competitive panel that will 
suit my camping and home QRP needs.

Thanks for the helpful answers and the 
time you all took to reply.

73,

Gary
KA1J
Slowly slogging into the 21st century...



> On 8/14/2019 9:57 AM, Gary Smith wrote:
> > As I'll be buying this sight unseen from
> > the web, any suggestions of an inexpensive
> > controller and panel that is known to be
> > essentially RFI clean & reliable?
> 
> YES, and some installation advice. First, panels are not noisy, but
> charge controllers are notoriously noisy. The only ones I know of that
> are not are the MPPT controllers made by Genasun. They are only made
> for relatively small systems like the one you are probably thinking
> of. They have several models, designed for different panel voltages,
> charge currents, battery voltages, and battery type. I use them in my
> home station and for portable operation on FD, CQP, and 7QP county
> expeditions.
> 
> The installation part consists of 1) using only twisted pair for the
> entire circuit consisting of battery(ies) and panel(s); 2) carrying
> both conductors through each part of that series circuit, breaking on
> conductor to add the series element; and 3) if antennas are very close
> to this wiring, adding a serious common mode choke, following the
> recommendations in
> 
> http://k9yc.com/2018Cookbook.pdf for #12 THHN or NM wire for the bands
> where the antennas are very close.
> 
> You will also want a good choke on the output of the generator.
> There's a design for a very good one on page 23 of the Jan 2019
> revision of k9yc.com/RFI-Ham.pdf
> 
> 73, Jim K9YC
> 
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