[RE-wrenches] Bi-Directional / Netmetering question

[AE Solar]

The Enphase CTs are directional. There is an arrow on them. I believe it’s
supposed to point towards the load side for both consumption and production
but not positive off the top of my head.

On Wed, Aug 15, 2018 at 7:10 PM Kirpal <solarworks at gmail.com> wrote:

> Jason...not sure about the Enphase consumption monitoring, if it is done
> with CT's confirm that your CT's are facing the right direction.  Some CT's
> are directional and perhaps your consumption monitoring could be backwards
> instead of the utility meter wiring backwards.....Seems like the utility
> would have noticed incorrect wiring in their can.
> We use the E Gauge CT clamps for some monitoring and they are
> directional.  I am not familiar with the Enphase versions.
>
>
> Sunny Regards,
> Kirpal Khalsa
> Oregon LRT#25
> NABCEP Certified PV Installation Professional
> Oregon Solarworks LLC
> www.oregonsolarworks.com
> 541-299-0402
>
> On Wed, Aug 15, 2018 at 4:01 PM, Jason Szumlanski <
> jason at floridasolardesigngroup.com> wrote:
>
>> Is it possible for a utility meter to be programmed/wired backward? I
>> have a client on an Enphase system with production and consumption
>> monitoring, and the Enphase monitoring is showing solar production exceeded
>> consumption by 400 kWh for a billing period. However, the meter is reading
>> almost exactly the opposite. It seems too coincidental.
>>
>> I'm going to go out to the site tomorrow to shut down all of the loads
>> and see what happens when solar is only backfeeding the meter, but I'm
>> curious how the meters are "programmed" or set up to work.
>>
>> Note that the meter was zeroed to start and the initial billing period
>> readings show DEL exceeded REC by 400 kWh, which matches what was billed
>> (net usage of positive 400 kWh).
>>
>> Jason Szumlanski
>>
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