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<font size="2"><span style="font-size:11pt">Date: Wed, 27 Apr 2022 12:08:24 -0400<br>
From: Dave Tedeyan <dave@sungineersolar.com><br>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
Subject: [RE-wrenches] SMA Rapid Shutdown and Secure Power Supply<br>
Message-ID:<br>
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Content-Type: text/plain; charset="utf-8"<br>
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Hi All,<br>
<br>
The last SMA-41 inverter I commissioned, had the option for SunSpec rapid<br>
shutdown with Secure Power Supply. I just talked to a level one tech who<br>
was not particularly familiar, but told me that with a sunspec rapid<br>
shutdown device like the JMS-F, you can still use the Secure Power Supply<br>
as if there was no rapid shutdown. I had stopped installing the SPS on<br>
rooftop systems, because if losing grid power initiates rapid shutdown,<br>
then you clearly do not have the power to run a SPS. But it sounds like<br>
maybe the inverter has the smarts to wake the solar back up once you flip<br>
the switch to activate the SPS. Can anyone here verify this? Have you done<br>
this, and does it work as expected with no extra hardware needed?<br>
<br>
Cheers,<br>
Dave<br>
<br>
-- <br>
[image: Logo] <<a href="https://www.sungineersolar.com/" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="2">https://www.sungineersolar.com/</a>><br>
Dave Tedeyan, P.E.<br>
Owner | Sungineer Solar<br>
p: he | him | his<br>
a: 1653 Slaterville Rd. | Ithaca, NY 14850<br>
w: <a href="http://www.sungineersolar.com" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="3">
www.sungineersolar.com</a> <<a href="http://www.sungineersolar.com/" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="4">http://www.sungineersolar.com/</a>><br>
c: (607) 288-2898</span></font></div>
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<font size="2">Hi Dave</font></div>
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<font size="2">I just installed a pair of SB7.7-US41 inverters with the JMS-F Sunspec devices.
<br>
</font></div>
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<font size="2">The onboard software setup specifies that the Secure Power outlet will not work with the JMS-F devices.
<br>
</font></div>
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<font size="2">These are de-activated when the AC power is off, so even if you connected the Secure Power outlet there is no signal to turn on the JMS-F switches.
<br>
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<font size="2">Don Barch</font></div>
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<font size="2">Energy Solar</font></div>
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<font size="2">707-483-4751</font><br>
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