[RE-wrenches] Bi-Directional / Netmetering question

[William Miller]

Friends:

I have seen utilities misappropriate values from their meter to the billing. That might explain your discrepancies. 

William

> On Aug 16, 2018, at 7:57 AM, Lorenzo Ortiz <lorenzo at cal-solar.com> wrote:
> 
> Fun fact: Sometimes the stickers on the CT's are incorrect too. Had that happen and took forever to figure out... 
> 
>> On Wed, Aug 15, 2018 at 4:10 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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> 
> 
> 
> -- 
> Lorenzo Ortiz   Commercial PV Designer
> 
>     lorenzo at cal-solar.com  (530) 274-3671
>   
> 
> 
> 
> Showroom located at: 149 E Main St. Grass Valley, CA 95945
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