I am looking at a solar power system that uses multiple "mini-inverters", Enphase Energy
M215-60-2LL-S2x. They use a data-over-powerline type of system to transmit information
to/from the inverters and a central device.
On Wednesday, October 12, 2011 08:54:28 PM Vic K2VCO wrote:
> I am looking at a solar power system that uses multiple "mini-inverters",
> Enphase Energy M215-60-2LL-S2x. They use a data-over-powerline type of
> system to transmit information to/from the inverters and a central device.
> Does anyone have any experience with this kind of system re RFI? Does
> anyone know what frequencies are used by the powerline communications
I have had a solar power system using enphase mini-inverters for a little over
a year. I haven't been terrribly active in radio over that time but did
investigate the noise issue. I was concerned both about the inverters
themselves and the powerline modem. I tuned my K2 to 10 meters on a day when
it was very quiet and could not hear a difference between having the solar
array active or not. I have never noticed any noise I could attribute to the
system. My 'shack' is on the second floor directly under the solar aray. As
they say, your mileage may vary, but don't think it's a serious issue. I
don't know much about the Enphase communication between the inverters and the
Envoy interface. They aren't very sharing of technical information.
Since I did the noise test I had a problem with the reliability of the power
line modem (unrelated to the test) and have gone to a wireles connection from
the Enphase interface box (Envoy) to my local network, but that wouldn't
effect the communication between the inverters and the interface.
On 10/13/2011 3:16 PM, Leigh L. Klotz Jr WA5ZNU wrote:
> I have one of these and it does make a little noise; I'm planning to bypass
> it a bit.
Consider a common mode choke formed by winding turns of the cable
carrying the noise through a #31 or #43 ferrite core. Use only #31
below 5 MHz. Both work well above 5 MHz, #43 is slightly better above
20 MHz. See my RFI tutorial for more detailed advice.