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 874049
www.frenergy.net
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 <w...@solarenergy.org
<mailto:w...@solarenergy.org>> 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
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Curriculum Developer
e: w...@solarenergy.org <mailto:w...@solarenergy.org>
w: www.solarenergy.org <http://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
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On Tue, Mar 30, 2021 at 9:24 PM greg egan <g...@remotepowerinc.com
<mailto:g...@remotepowerinc.com>> 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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