[RFI] Low RFI Solar Inverters

[bill ny9h]

your comment " Note that I have a typical urban noise level, so it is 
possible these systems would cause noticeable RFI in a quiet location"

leads me to ask what IS your urban level...by band..


I now enjoy an S2-3      on 80 with A DIPOLE ... k4 no preamps on...( 
dipole is 50 feet from the house , up 45 feet)

and my 10 year old SMA inverters make not a peep &  my 18kw Generac 
makes no noise \


Bill   now in the boonies     with occasional light electric fence 
rfi...( NB fixes that)



On 1/6/2025 6:12 PM, K9MA wrote:
> I now know two manufactures of solar inverters which are apparently 
> free of RFI.Both are microinverter systems.
>
> Enphase IQ7 Series:
>
> I have these on my system, as does my immediate neighbor, 20 meters 
> from my tower. both systems have ferrite chokes on the cables, which 
> may not be necessary. Another neighbor, about 110 meters away at 330 
> deg. has an Enphase system without chokes, which causes no interference.
>
>
> AP Systems DS3-S:
>
> No interference detected 100 meters from tower. This neighbor is to 
> the NE, where I often have my beam pointed.
>
> ---
>
> Note that I have a typical urban noise level, so it is possible these 
> systems would cause noticeable RFI in a quiet location. Of course, 
> hams in such locations are unlikely to have neighbors so close.
>
> On the other hand, the Generac system 650 meters away has been shut 
> down since last summer, as Generac tries to find a solution. I must 
> recommend avoiding Generac systems at all cost.
>
> 73,
>
-- 
link to my QRZ listing https://www.qrz.com/db/ny9h