Re: [RFI] I would like to compile a list of zero RFI solar power systems that hams own

[Mike NA6MB <na6mb.mike@gmail.com>]

Hi Randy -

We have a Sunny Boy inverter fed by high voltage DC from the panels.
No roof inverters.

Mike
NA6MB

On 7/2/2018 7:42 PM, Randy Standke wrote:
> Hello fellow hams,
>
> I am giving a talk on ham radio and solar power to a ham radio club in just
> over a week.  I am specifically looking for brand names and types of
> inverters that hams own themselves, and are happy with from a RFI
> standpoint.  And, it would also be useful for the brands and types that did
> generate RFI as originally installed.
>
>   
>
> My talk will consist of two parts: 1 - solar power for yourself.  2 -
> identifying RFI signals, locating the house, and reporting RFI generating
> solar systems in your neighborhood.
>
>   
>
> I have plenty of material for the Part 2 part due to the continuing
> popularity of one particular brand of solar power system in my neighborhood.
>
>   
>
> However, my only experience with a RFI free solar power system is my own.
> That system has no switching circuitry on the roof, and a Fronius inverter
> at ground level.
>
>   
>
> I expect the safest route is to do what I did and keep all switching
> circuitry off of the roof.  So, are there other brands of inverters (than
> Fronius) that some of you know of that are RFI free?  Also, the single
> ground mounted inverter plan does come with a back up option.  That being if
> there is some RFI, a single filter at both ends will probably fix it.
> However, the goal is solar power, zero RFI,  no need for modifications.
>
>   
>
> The second solar power system I know of is micro inverters.  However, now
> you have a lot of switching circuitry on the roof, much closer to your
> antenna, and if you have noise a fix won't be easy.  If any of you have
> micro inverters, what is your RFI experience and what is the brand?
>
>   
>
> The third option are the systems with DC/DC converters (optimizers) on each
> panel.  For now, this one gets a "just say no."  As far as I know, these all
> generate a lot of RFI and I am not aware of a case where it was completely
> solved after much modification to the wiring and addition of ferrite.  Maybe
> future improvements will change my opinion.  Or, reports of a specific brand
> that was RFI free as originally installed.
>
>   
>
> Thanks in advance,
>
>   
>
> 73,
>
>   
>
> Randy KQ6RS
>
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--
Thanks,
Mike
NA6MB

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