Does UL1741 cover zero sell? I wasn't aware of that. I thought it just covered anti-islanding. If zero sell is covered, I don't see why a utility would not accept that.
On Wed, Mar 31, 2021, 11:51 AM Jay <[email protected]> wrote: > A number of companies have this feature which is under their UL listing. > SE > SolArk > To name 2. > > Are you saying that the UL listing isn’t enough and that it needs 3rd > party testing. > If so what organization/testing would that be? > > Jay > Peltz power > > On Mar 31, 2021, at 8:27 AM, Jason Szumlanski < > [email protected]> wrote: > > > I wonder how quick these software based approaches are to respond to loads > that drop off and momentary selling that may occur before production is > curtailed. I think what Greg may be asking is whether there is a failsafe > method to prevent backfeed. Without a battery, I'm not sure how that would > be accomplished. It's an interesting question. > > I can see a small utility not accepting a non-failsafe software based > solution unless it can be shown to be 100% effective via third party > listing/certification. > > Jason Szumlanski > Florida Solar Design Group > > On Wed, Mar 31, 2021, 7:29 AM Will White <[email protected]> wrote: > >> Many inverters have the option to zero-sell (no export to the grid) but >> you need an additional CT on the main service conductors so the inverter >> can monitor the loads and ramp down production if it starts to get close to >> producing more than the loads require. >> >> I'd suggest getting into the manuals and white papers of the inverter >> manufacturers to determine if they can do this. I believe both SolarEdge >> and Enphase can do it. I'd assume others can as well. >> >> Thanks, >> Will >> >> >> -- >> *Will White* >> Curriculum Developer >> >> >> e: [email protected] >> w: www.solarenergy.org >> p: 802-272-3092 >> >> NABCEP Certified PV Installation Professional >> # 093006-34 >> Do you envision a world powered by renewable energy? Be the change >> <http://solarenergy.org/donate>. >> >> >> On Tue, Mar 30, 2021 at 9:24 PM greg egan <[email protected]> >> wrote: >> >>> Wrenches, I've got a small system using SolarEdge inverter (4 kW) that >>> is supposed to go in to a small town that does not allow selling power >>> to the grid. That may change but that is how it stands now. The >>> customer wants to use the power that is generated but can not sell or >>> even give excess power away. Do any of you have any experience setting >>> up a grid tie no battery system so that it can not sell to the grid >>> under any circumstances? Just wondering before I dig any deeper if >>> there's an obvious solution I'm missing. Thanks, >>> >>> Greg Egan >>> Remote Power Inc. >>> >>> >>> >>> _______________________________________________ >>> >> _______________________________________________ > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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