Yes, seems a little heavy handed to require this so quickly out of the gates. This is Rocky Mountain Power specifically Eastern Utah, owned or operated by Pacific Corp. This may be a way to get the customer to pay for a transformer upgrade. They offered an alternative to this compliance by utilizing an effective grounding transformer with associated relay control system. I am gathering info on these requirements because its not clear if this is a utility side transformer or if that would be customer sided.
They seem to be very concerned about these distributed resources contributing to transient overvoltage events. I will say that this area has a very high proportion of solar, its on most homes in this community, so I'm not sure how wide-spread this requirement is. On Wed, Aug 26, 2020 at 7:13 PM Harry Mahon <[email protected]> wrote: > Mac – what utility is this? > > > > My understanding is that IEEE 1547.1-2020 contains the details of the > testing protocol so that devices CAN be listed to 1547-2018. It got > published in late May 2020. > > > > Are ANY inverters listed yet? My understanding is testing is a months > long process and that would if the testing facilities have finalized the > process they will use. > > > > Sounds like a way to force the transformer choice on you… > > > > Mike > > > > SMA America > *Michael Mahon* > Technical Trainer, Solar Academy > 6020 West Oaks Boulevard, Suite 300 > > Rocklin, CA 95765 > > U.S.A. > Mobile: +1 916 918 9412 > * www.SMA-America.com <http://www.sma-america.com/>* > > > > Solar Academy: https://solaracademy.sma.de/en.html > > > > SMA America Solar Academy webinars: > https://solaracademy.sma.de/en/courses.html > > Choose "United States" > > [image: A picture containing drawing, food Description automatically > generated] > <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sma-america.com%2FShadeFix&data=02%7C01%7CMichael.Mahon%40sma-america.com%7Ceb737bd7586646b4d14b08d811405661%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C0%7C637278315315432372&sdata=uyZ5K7ayyl6y%2Fa90qQ0%2F4r8WSV0PYLK1CYMJQxPVeCQ%3D&reserved=0> > > > > [image: Linkedin Logo] <http://www.linkedin.com/company/364675> > <http://www.youtube.com/playlist?list=PL840A5336CAC32332> [image: > SMAAFORUM_ICON] <http://smaadvance.com/signup/> Follow, Like, Share > > > > This email and any attachments thereto may contain SMA America, LLC > confidential, privileged and private material for the sole use of the > intended recipient. Any review, copying, or distribution of this email (or > any attachments thereto) by others is strictly prohibited. If you are not > the intended recipient, please contact the sender immediately and > permanently delete the original and any copies of this email and any > attachments thereto. Thank you. > > > > *From:* RE-wrenches <[email protected]> *On > Behalf Of *Mac Lewis > *Sent:* Wednesday, August 26, 2020 4:47 PM > *To:* RE-wrenches <[email protected]> > *Subject:* [RE-wrenches] Stackable Battery-Based systems complying to > IEEE 1547-2018 standard > > > > Hi Wrenches, > > > > I am working on a design for an all-electric home whole-house backup. The > utility is requiring either an inverter listed to IEEE 1547-2018 or utilize > an effective grounding transformer with associated relay control system. > Im unclear whether the grounding transformer is on the customer side or on > the utility side, but I'd prefer to avoid this if possible. > > > > I probably need ~20kW of continuous backup in this case. I prefer to have > everything stacked if possible, but I may be able to split up my critical > load panels. > > > > Has anyone worked through this issue? I was planning on Sol-Ark but they > don't comply with the IEEE 1547-2018 quite yet. I'm open to suggestions. > > > > Thanks > > > > -- > > > > > > > > Mac Lewis > > "Yo solo sé que no sé nada." *-Sócrates* > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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