Also check that the voltage reference is correct for each CT. If the CT on L1 has a voltage reference of L2, then it looks as if the CT's are backwards, but really it is the voltage reference that is backwards. Some panels are not intuitive as to which Line corresponds to which side of the bus bar (i.e. the line on the left of the top of the main breaker actually connects to the bus bar on the right). Ringing it out is not a good way to determine if you have the correct line, you need to check for voltage. If you get 0V, then you are looking at the same line. If you get 240V, then you have the wrong voltage reference.
Cheers, Dave *Dave Tedeyan* Senior Engineer | Taitem Engineering, PC 10 Verizon Lane | Lansing, NY 14882 o. *607.930.3481* x6 f. 607.277.2119 www.taitem.com Solar • Sustainability • Energy • Design B-Corporation Best for the World 2018 Honoree On Thu, Aug 16, 2018 at 12:08 AM, frenergy <frene...@psln.com> wrote: > Jason, > > I'm so glad you brought this up, I'm having a very similar > issue backfeeding a utility (PG&E) meter that we recently started > backfeeding on a small commercial job. Somewhat unique in that its > 208/120 SINGLE phase (L-L-N). The inverters are pushing about 3,000 > KWhrs/month to the grid, way more than typical July consumption at this > site but their billing shows modest consumption. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049www.frenergy.net > > On 8/15/2018 4:01 PM, Jason Szumlanski 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 > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out or update participant bios:www.members.re-wrenches.org > > > -- > > > > ------------------------------ > [image: Avast logo] <https://www.avast.com/antivirus> > > This email has been checked for viruses by Avast antivirus software. > www.avast.com <https://www.avast.com/antivirus> > > <#m_511908107291212340_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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