Enphase mini-inverter

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Enphase mini-inverter

Victor Rosenthal 4X6GP
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 thingy?
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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Re: Enphase mini-inverter

Jim Brown-10
On 10/12/2011 5:54 PM, Vic K2VCO wrote:
> I am looking at a solar power system that uses multiple "mini-inverters", Enphase Energy
> M215-60-2LL-S2x.

You should ask this question on the RFI list (accessible from
contesting.com) (or perhaps search the archives).  I think I recall a
recent discussion of products from this company.

73, Jim K9YC
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Re: Enphase mini-inverter

w1az@comcast.net
In reply to this post by Victor Rosenthal 4X6GP
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
> thingy?

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.  

Bernie
W1AZ
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Re: Enphase mini-inverter

Leigh L. Klotz Jr WA5ZNU
Administrator
In reply to this post by Victor Rosenthal 4X6GP
Vic,

Not exactly the same model, but you might find this interesting.
I have one of these and it does make a little noise; I'm planning to bypass it a bit.
BTW, the case on this one seems to be at V/2.
http://www.thebackshed.com/forum/forum_posts.asp?TID=3219

Leigh/WA5ZNU
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Re: Enphase mini-inverter

Jim Brown-10
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.

73, Jim K9YC
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