[amsat-bb] Solar panel inverters--radio noise?

[Robert Bragg]

I have a 7kw SMA Sunny Boy inverter and I can say that I have experienced
no noticeable interference.  My inverter is in the barn about 125' from the
house, and about 125' from my antenna.  I also have tested my
portable/mobile HF rig parked 20' away on HF SSB with no noise.  Also, I
regularly work Sats. mostly FM, but I have started SSB, typically 15'-25'
away.  It is not an inexpensive inverter, but I have been extremely pleased
with it from a performance standpoint, and an RF noise standpoint.

R.J.
WY7AA

On Sun, Feb 10, 2019 at 8:23 PM <skristof at etczone.com> wrote:

> I concur. Unfortunately, my knowledge comes from personal experience. I
> did not do my homework before getting my solar panels. Each of the 14
> panels has its optimizer. I used to use dipoles in my attic. Imagine how
> that sounded the first time I turned on my radios once the solar panels
> were up and running.
>
> I quit the attic dipoles and put an end fed wire out the back of my 2nd
> story window. That was better but not much. I bought a Timewave ANC-4
> Noise Canceller. That actually does reduce the noise somewhat. 40 m is
> now usable during the day. But the box only works on HF.
>
> The noise level is also a problem on VHF. I used to download satellite
> telemetry during daytime passes, but I can't really do that anymore. I
> can do some satellite work from the house at night. Otherwise, if I have
> had a satellite QSO with any of you in the last year, it was with a
> handheld and an Arrow from my backyard, preferably pointing the Arrow
> away from the house.
>
> I did have toroids from Palomar Engineers installed on the wiring of the
> panels after the fact, but they didn't help much. Maybe a little.
>
> I do not regret going solar, but I wish I'd done more research first.
> Learn from my mistakes.
>
> Steve AI9IN
>
> On 2019-02-10 19:52, Robert Bruninga wrote:
>
> > The Solar Inverters that are terrible are the OPTIMIZERS.   Little RF
> > generators on EVERY panel all over the roof.
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