On 6/19/2014 4:16 AM, Tony Brock-Fisher via TowerTalk wrote:
I'm considering converting to solar power for my home. A major concern
from the RF point of view is the potential problem of noise from the
large scale inverter used to convert the DC from the panels to AC for
the house and to be fed back on the grid. The potential installation
would use a Solar Edge SE7600A-US inverter, which is certified FCC
part 15 class B.
You are right to be concerned. Solar systems are notorious for
generating big RF noise, but they can also be done very well.
Unfortunately, FCC part 15 Class B isn't very stringent, so a certified
product can still put out a lot of trash.
The installation methods also matter a lot. ALL wiring on the DC side
should be twisted pair, all AC wiring should be twisted triplet (high,
neutral, ground, or high, high, ground if 240V). Ferrite chokes wound
following the guidelines for coax chokes in Chapter 8 of
k9yc.com/RFI-Ham.pdf should be on both DC and AC wiring.
Your contract for the system should require that there be no RF noise,
and you should withhold at least 1/3 of the total cost of the project as
security.
73, Jim K9YC
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