[RE-wrenches] Enphase and Line Noise

[Jason Szumlanski]

 I agree with August. Install an outlet on the subpanel that combines the
branch circuits and plug the Envoy in there. Buy the Envoy with the
powerline Ethernet devices. We have reduced our issues to essentially zero.
As a package deal, we almost always sell PV systems with a Pentair Variable
Speed Pump with every pool home (explaining that they will save more money
from the pump investment than equivalently priced PV). I've never had a
single interference issue attributable to a VFD. About half of all pool
pumps around here are fed directly from a main distribution panel, with the
other half on a pool subpanel.


We have commercial systems up to 54kW on a single meter and 75kW on three
adjacent meters with no communication line filters. I would advise you to
make the line filter an after-the-fact potential change order on commercial
applications. See if it works without first - others may disagree with this
approach, but we have never had to use one.

Jason Szumlanski
Fafco Solar


On Wed, Oct 16, 2013 at 8:14 PM, August Goers <august at luminalt.com> wrote:

> Hi Mark,
>
> We have lots of Enphase installed on all sorts of home. The most sure fire
> way of getting communication is to install an outlet directly off of the
> panel that you tied the Enphase breakers into. Then plug the Envoy into
> this outlet. It is a little more work but we haven't had a system yet where
> it didn't work. Our pricing has this cost worked into it.
>
> Best, August
>
> *August Goers*
>
> Principal
>
> Luminalt Energy Corporation
>
> o: 415.641.4000
>
> m: 415.559.1525
>
> www.luminalt.com
>
>
>
>
> On Wed, Oct 16, 2013 at 1:01 PM, <markf at berkeleysolar.com> wrote:
>
>> Guys,
>>
>> I am thinking of getting back into using Enphase, but I am worried about
>> sites with high line noise block communication with the microinverters.
>>
>> I have run into homes with light control systems and VFD pumps.
>>
>> I am wonder what folks have experienced:
>>
>> 1 - How often do you encounter this problem?
>> 2 - What are other causes of noise that impacted the site?
>> 3 - How did you address, with a line filter?
>> 4 - How did you handle the added cost, passed it on or eat it?
>>
>> Thanks,
>>
>> Mark Frye
>> Berkeley Solar Electric Systems
>>
>
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