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<p>Rick,</p>
<p> Its possible you won't find it that way because its
already fried and in an open circuited or bypass mode. But keep
us updated, we're very interested.<br>
</p>
<p>Bill</p>
<p>Feather River Solar Electric<br>
</p>
<div class="moz-cite-prefix">On 6/21/2021 2:44 PM,
<a class="moz-txt-link-abbreviated" href="mailto:rick@solshineenergy.com">rick@solshineenergy.com</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:0AE23555-77CC-4660-9131-EA7B103B6D80@solshineenergy.com">I\u2019m
going to try the thermal camera trick before resorting to lifting
modules. <br>
<br>
<div dir="ltr"><span>rick brown<br>
SolShine Energy Alternatives, LLC<br>
Electrical & Solar Contracting Services<br>
<a class="moz-txt-link-abbreviated" href="http://www.SolShineEnergy.com">www.SolShineEnergy.com</a><br>
Check, Virginia 24072</span>
<div><span>O: 540.235.3095<br>
M: 540.808.9502<br>
<br>
VA Class A Contractor Lic# 2705147660<br>
VA Master Electrician Lic# 2710062762<br>
VA Alternative Energy Systems Installer <br>
NABCEP Certified PV Installation Professional 110112-21</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jun 21, 2021, at 5:42 PM, Jeremy
Coxon <a class="moz-txt-link-rfc2396E" href="mailto:jcoxon@sunwindpowerinc.com"><jcoxon@sunwindpowerinc.com></a> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeffWe are going through a similar scenario right
now with APSmart RSD\u2019s and a SMA 7.0 that will start up and
run, then the next day no start up at dawn. Perform a hard
reset on inverter and array starts up, runs all day, then the
next morning we\u2019re back to doing a hard reset to get array to
start up.
<div><br>
</div>
<div>Very simple system 2 strings of 12, voltages at inverter
around 8V (12x0.7=8.4V) - short run with oversized
conductors means very small voltage drop thankfully. SMA
says we need to be on site to troubleshoot, but without the
little APS RSD Eye, I\u2019m thinking they\u2019re just going to say
it\u2019s not their problem. APS\u2019s troubleshooting guide
basically says lift each panel to find the problem. Not a
happy camper!</div>
<div>
<div><br>
<div dir="ltr">
<div>Jeremy Coxon NABCEP </div>
<div>Certified MWBE</div>
<div><br>
</div>
Sent from my iPhone</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jun 21, 2021, at 12:43 PM,
<a class="moz-txt-link-rfc2396E" href="mailto:rick@solshineenergy.com">"rick@solshineenergy.com"</a>
<a class="moz-txt-link-rfc2396E" href="mailto:rick@solshineenergy.com"><rick@solshineenergy.com></a> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeffCarl,
<div>That\u2019s very helpful. We\u2019ll check each module and
report back. <br>
<br>
<div dir="ltr"><span>rick brown<br>
SolShine Energy Alternatives, LLC<br>
Electrical & Solar Contracting Services<br>
<a class="moz-txt-link-abbreviated" href="http://www.SolShineEnergy.com">www.SolShineEnergy.com</a><br>
Check, Virginia 24072</span>
<div><span>O: 540.235.3095<br>
M: 540.808.9502<br>
<br>
VA Class A Contractor Lic# 2705147660<br>
VA Master Electrician Lic# 2710062762<br>
VA Alternative Energy Systems Installer <br>
NABCEP Certified PV Installation
Professional 110112-21</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jun 21, 2021, at 12:15
PM, Carl Adams <a class="moz-txt-link-rfc2396E" href="mailto:cadams@sunrocksolar.com"><cadams@sunrocksolar.com></a>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeff
<div dir="ltr">Rick,
<div>I was recently troubleshooting a similar
problem. Open circuit voltage on
all strings was as expected but under load
one string was showing almost no power.
Tracked this down to a failed APSmart device
which had clear signs of thermal damage.
Pictures 1.1 and 1.2. .
<div>A second failed unit some months later
had a thermal failure and this one toasted
the module. Picture 2.1.</div>
<div><br>
</div>
<div>These devices can make it difficult to
do any meaningful string level testing.
The devices output a nominal 0.7 volts in
open circuit conditions. That
documentation says this voltage reading
is <u>+</u> 25%, so in theory you could
have a number of devices which were not
working and your string voltage would not
indicate that.</div>
<div><br>
</div>
<div>APSmart does make a test device which
can help you verify the functionality.
The device is called RSD-EYE+ Detector.
You can contact YI Kang , <b><span>APPLICATION
& TECHNICAL SUPPORT MANAGER,</span></b></div>
<div><b><span>MLRSD </span></b>at APSmart
for additional information. <span> </span><span>737.218.8486</span></div>
<div>
<div><FailedAPSmart1.2.jpg></div>
<br>
<div>
<div dir="ltr"
data-smartmail="gmail_signature">
<div dir="ltr">
<div>
<div><FailedAPSmart2.1.jpg></div>
<br>
<div><FailedAPSmart1.1.jpg></div>
<br>
<div>With Kind Regards
<div>Carl Adams, President</div>
<div>SunRock Solar, LLC</div>
513.290.9072 (mobile)</div>
<div>513.766.6025 (office)</div>
<br>
</div>
</div>
</div>
</div>
<br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jun
21, 2021 at 11:55 AM Lloyd Hoffstatter <<a
href="mailto:lloyd@sunstruckconsulting.com" target="_blank"
moz-do-not-send="true">lloyd@sunstruckconsulting.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote">
<div>
<div>
<div>
<div dir="ltr">
Rick,</div>
<div dir="ltr">
I would check with SMA to make sure
you have the latest firmware.</div>
<div dir="ltr">
<br>
</div>
<div dir="ltr">
Best regards,</div>
<div dir="ltr">
Lloyd</div>
<div dir="ltr">
<br>
</div>
<div dir="ltr">
Lloyd Hoffstatter</div>
<div dir="ltr">
Sunstruck Consulting</div>
</div>
<div
id="gmail-m_7432443947316214792gmail-m_1138851491947336934gmail-m_3567001989742486314gmail-m_-8526887617016525303ms-outlook-mobile-signature">
<div><br>
</div>
Get <a href="https://aka.ms/o0ukef"
target="_blank"
moz-do-not-send="true">Outlook for
iOS</a></div>
</div>
<hr>
<div
id="gmail-m_7432443947316214792gmail-m_1138851491947336934gmail-m_3567001989742486314gmail-m_-8526887617016525303divRplyFwdMsg"
dir="ltr"><b>From:</b> RE-wrenches <<a
href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank"
moz-do-not-send="true">re-wrenches-bounces@lists.re-wrenches.org</a>>
on behalf of <a
href="mailto:rick@solshineenergy.com"
target="_blank" moz-do-not-send="true">rick@solshineenergy.com</a>
<<a
href="mailto:rick@solshineenergy.com"
target="_blank" moz-do-not-send="true">rick@solshineenergy.com</a>><br>
<b>Sent:</b> Monday, June 21, 2021
11:42:36 AM<br>
<b>To:</b> RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
target="_blank" moz-do-not-send="true">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Subject:</b> [RE-wrenches] RSD
Troubleshooting Help
<div> </div>
</div>
<div><span>
<div>Wrenches,<br>
<br>
I\u2019m in need of some troubleshooting
help on a newly installed system
with rapid shutdown. System consists
2 SMA SB5.0-1 SP-US-41 (RSD
version), RSD devices are APS
RSD-S-PLC. Each SB is configured
with two strings of 9. Modules are
REC Alpha 360s.
<br>
<br>
This system was fully functional for
about 1 week before things went
awry. Initial symptoms were that one
of the two strings read 0V 0A on the
display while the other read ~315V,
5A. The RSD devices output ~700mV
each when in the off mode (a nice
verification feature). I\u2019m reading
the correct voltage - 6.75V - on
both strings when in off mode. Once
the Sunny Boy comes on line I\u2019m
reading around 10V on the faulty
string and the correct voltage -
~315V - on the other string.
<br>
<br>
The above seems to indicate that
each RSD is getting sufficient DC
voltage from the module. Short of
pulling each module and doing a
visual check what else can I look
at? How do you isolate a faulty RSD
device?<br>
<br>
And as luck would have it,
everything is functional at the
moment. <br>
<br>
Thanks,<br>
<br>
rick brown<br>
SolShine Energy Alternatives, LLC<br>
Electrical & Solar Contracting
Services<br>
<a
href="http://www.SolShineEnergy.com"
target="_blank"
moz-do-not-send="true">www.SolShineEnergy.com</a><br>
Check, Virginia 24072<br>
O: 540.235.3095<br>
M: 540.808.9502<br>
<br>
VA Class A Contractor Lic#
2705147660<br>
VA Master Electrician Lic#
2710062762<br>
VA Alternative Energy Systems
Installer <br>
NABCEP Certified PV Installation
Professional 110112-21<br>
<br>
<br>
<br>
<br>
<br>
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