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<p>Chalk it up as another reason Rapid Shutdown is a bummer.</p>
<p>Bill</p>
<pre class="moz-signature" cols="72">Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049</pre>
<div class="moz-cite-prefix">On 4/28/2022 9:11 AM, Harry Mahon via
RE-wrenches wrote:<br>
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<p class="MsoNormal">Dave \u2013 Unfortunately the SPS feature is not
\u201cback\u201d fully. Choosing \u201cyes\u201d during commissioning for the SPS
feature allows for it to work (with switch and outlet
installed) but ONLY for the same solar day as an outage
occurs.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When the Sunny Boy goes to sleep, the
sunspec transmitter will stop and the array will be in
shutdown the next day.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Apologies for any confusion, as this is not
the \u201csame\u201d SPS that we have been talking about since 2013\u2026.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please also note that choosing \u201cyes\u201d for
the SPS feature during commissioning means the DC disconnect
must be the Rapid Shutdown initiator, as the SunSpec signal
must be disconnected from the array when the grid fails to
trigger shutdown. If the AC breaker or other AC disconnect is
to be used as the RSI, \u201cno\u201d should be chosen for that second
menu choice after \u201cSunspec\u201d is chosen for shutdown method on
tab 4 of the Install Assistant.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It is unlikely that this generation of
Sunny Boy will improve the SPS situation, but SMA is working
to fully reintroduce the SPS feature with the next gen Sunny
Boy. Stay tuned\u2026<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards \u2013<o:p></o:p></p>
<p class="MsoNormal">Mike<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><br>
<span style="font-size:12.0pt">Michael Mahon</span><br>
Senior Technical Trainer, Solar Academy<br>
<b>SMA America</b> <o:p></o:p></p>
<p class="MsoNormal">3925 Atherton Rd<o:p></o:p></p>
<p class="MsoNormal">Rocklin, CA 95765<br>
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<div style="border:none;border-top:solid #E1E1E1
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<p class="MsoNormal"><b>From:</b> RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><re-wrenches-bounces@lists.re-wrenches.org></a>
<b>On Behalf Of </b>Dave Tedeyan via RE-wrenches<br>
<b>Sent:</b> Wednesday, April 27, 2022 10:08 AM<br>
<b>To:</b> RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a><br>
<b>Cc:</b> Dave Tedeyan <a class="moz-txt-link-rfc2396E" href="mailto:dave@sungineersolar.com"><dave@sungineersolar.com></a><br>
<b>Subject:</b> [RE-wrenches] SMA Rapid Shutdown and Secure
Power Supply<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi All, <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The last SMA-41 inverter I
commissioned, had the option for SunSpec rapid shutdown
with Secure Power Supply. I just talked to a level one
tech who was not particularly familiar, but told me that
with a sunspec rapid shutdown device like the JMS-F, you
can still use the Secure Power Supply as if there was no
rapid shutdown. I had stopped installing the SPS on
rooftop systems, because if losing grid power initiates
rapid shutdown, then you clearly do not have the power to
run a SPS. But it sounds like maybe the inverter has the
smarts to wake the solar back up once you flip the switch
to activate the SPS. Can anyone here verify this? Have you
done this, and does it work as expected with no extra
hardware needed?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Cheers, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Dave<br clear="all">
<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">-- <o:p></o:p></p>
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Tedeyan, P.E.<br>
Owner | Sungineer Solar</span></b><span
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<pre class="moz-quote-pre" wrap="">_______________________________________________
L</pre>
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