<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"></div><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">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.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jason</div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><table border="0" cellpadding="0" cellspacing="0" style="font-family:"helvetica neue",helvetica,arial,sans-serif"><tbody><tr><td rowspan="2"></td><td rowspan="2"><table border="0" cellpadding="0" cellspacing="0" style="border-left-width:1px;border-left-style:solid;border-left-color:rgb(237,237,237);color:rgb(85,85,85);font-size:13px;padding-left:10px"><tbody><tr><td colspan="1"><table border="0" cellpadding="0" cellspacing="0" style="padding-top:5px"><tbody><tr><td style="padding-right:5px"></td><td style="padding-right:5px"></td><td style="padding-right:5px"></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table><b><div style="text-align:center"><br></div></b></div></div></div></div></div></div></div></div></div><br></div><br><img width="0" height="0" class="mailtrack-img" alt="" style="display:flex" src="https://mailtrack.io/trace/mail/0c5b66f266e68db3ceebb09bef847bf7677ef978.png?u=1613865"><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 31, 2021 at 11:04 AM frenergy <<a href="mailto:frenergy@psln.com">frenergy@psln.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>On the other hand, utilities <i>have</i> accepted inverters to
shut-off power production into the grid if the grid fails via, I
assume, software and/or electro-mechanical means.<br>
</p>
<p>Bill</p>
<pre cols="72">Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
<a href="https://mailtrack.io/trace/link/8d5670d85d42db80b5299de925467fc19f3e163a?url=http%3A%2F%2Fwww.frenergy.net&userId=1613865&signature=ee5367a4466e2a21" target="_blank">www.frenergy.net</a></pre>
<div>On 3/31/2021 4:35 AM, Jason Szumlanski
wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">
<div>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.</div>
<div dir="auto"><br>
</div>
<div dir="auto">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.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Jason Szumlanski</div>
<div dir="auto">Florida Solar Design Group<br>
<br>
<div class="gmail_quote" dir="auto">
<div dir="ltr" class="gmail_attr">On Wed, Mar 31, 2021, 7:29
AM Will White <<a href="mailto:will@solarenergy.org" target="_blank">will@solarenergy.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">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.
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Will</div>
<div><br>
</div>
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<div dir="ltr"><b style="font-size:12.8px">Will
White</b>
<div style="font-size:12.8px">Curriculum
Developer</div>
<div style="font-size:12.8px"><br>
</div>
<div style="font-size:12.8px"><img src="https://docs.google.com/uc?export=download&id=12H3Cu2gnX7TKTeETn1WsYqa8cp6gsEj1&revid=0B7yAwArWHgPbNzhGK00wT0diY1c1NWhlRlNocDRVd045eTFjPQ" width="420" height="52"><br>
</div>
<div style="font-size:12.8px"><span style="font-size:12.8px">e: </span><a href="mailto:will@solarenergy.org" style="font-size:12.8px" rel="noreferrer" target="_blank">will@solarenergy.org</a><span style="font-size:12.8px"> </span><br>
</div>
<div>
<div style="font-size:12.8px"><span style="font-size:12.8px">w: <a href="https://mailtrack.io/trace/link/de1018063eefd337466f4696e3cd057d3ff30ab5?url=http%3A%2F%2Fwww.solarenergy.org%2F&userId=1613865&signature=5c7c169843f2b59f" rel="noreferrer" target="_blank">www.solarenergy.org</a> </span></div>
<div style="font-size:12.8px">p:
802-272-3092<br>
</div>
<div style="font-size:12.8px"><span style="font-size:12.8px"><br>
</span></div>
<div style="font-size:12.8px"><span style="font-size:12.8px">
<div>NABCEP Certified PV
Installation
Professional</div>
<div># 093006-34</div>
</span></div>
<div><span style="color:rgb(102,102,102);font-family:Arial,sans-serif;font-size:x-small">Do
you envision a world
powered by renewable
energy? </span><a href="https://mailtrack.io/trace/link/0aaf5baa6b2b13c1ecb405e65db7cf9a8eab0cce?url=http%3A%2F%2Fsolarenergy.org%2Fdonate&userId=1613865&signature=c97186f5a55083c7" style="font-family:Arial,sans-serif;font-size:x-small" rel="noreferrer" target="_blank">Be
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<div dir="ltr" class="gmail_attr">On Tue, Mar 30, 2021
at 9:24 PM greg egan <<a href="mailto:greg@remotepowerinc.com" rel="noreferrer" target="_blank">greg@remotepowerinc.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Wrenches, I've got
a small system using SolarEdge inverter (4 kW) that <br>
is supposed to go in to a small town that does not
allow selling power <br>
to the grid. That may change but that is how it
stands now. The <br>
customer wants to use the power that is generated but
can not sell or <br>
even give excess power away. Do any of you have any
experience setting <br>
up a grid tie no battery system so that it can not
sell to the grid <br>
under any circumstances? Just wondering before I dig
any deeper if <br>
there's an obvious solution I'm missing. Thanks,<br>
<br>
Greg Egan<br>
Remote Power Inc.<br>
<br>
<br>
<br>
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