[RFI] Generac Solar System RFI

[K9MA]

A few weeks ago, I tracked the source of 14 MHz interference to a 
neighbor's Generac solar system about 0.4 miles away. After I contacted 
the local installer, this morning I got a call from a Generac 
representative, John. (He also mentioned contact with the ARRL.) He told 
me the system has been disabled pending installation of new 
"optimizers", which are on back order until October. The homeowners are 
being compensated for loss of solar production in the meantime.

Optimizers are boost converters connected between each string of panels 
and the central inverter. John claimed to have had experience with 
similar situations and felt that the source of the interference was the 
optimizers, rather than the central inverter. He also seemed to be 
familiar with other mitigation measures, such as installation of ferrite 
cores on interconnecting cables. In any case, we will perform a test 
after the new optimizers are installed, and go from there.

-- 
Scott  K9MA

k9ma at sdellington.us