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. >> >> >> >> _______________________________________________ >> >
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