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@sdellington.us
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