Oh, for certain. Enphase has specific grid profiles (software) to accommodate utilities with zero export rules. It's my understanding that this is widely accepted. Other manufacturers support zero export, too. Even battery manufacturers are in on this, like Tesla Powerwalls can have zero export profiles or sell back stored energy to the grid for time-of-use and smart grid purposes.
Jason On Wed, Mar 31, 2021 at 11:04 AM frenergy <[email protected]> wrote: > On the other hand, utilities *have* accepted inverters to shut-off power > production into the grid if the grid fails via, I assume, software and/or > electro-mechanical means. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049www.frenergy.net > <https://mailtrack.io/trace/link/8d5670d85d42db80b5299de925467fc19f3e163a?url=http%3A%2F%2Fwww.frenergy.net&userId=1613865&signature=ee5367a4466e2a21> > > On 3/31/2021 4:35 AM, Jason Szumlanski 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 >> <https://mailtrack.io/trace/link/de1018063eefd337466f4696e3cd057d3ff30ab5?url=http%3A%2F%2Fwww.solarenergy.org%2F&userId=1613865&signature=5c7c169843f2b59f> >> >> p: 802-272-3092 >> >> NABCEP Certified PV Installation Professional >> # 093006-34 >> Do you envision a world powered by renewable energy? Be the change >> <https://mailtrack.io/trace/link/0aaf5baa6b2b13c1ecb405e65db7cf9a8eab0cce?url=http%3A%2F%2Fsolarenergy.org%2Fdonate&userId=1613865&signature=c97186f5a55083c7> >> . >> >> >> 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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