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<p>Glenn,</p>
<p> I don't know if this may help.... About 7 months ago I
also replaced 2 SWR2500's with a SB5000TL. Sunwise PVs, system
installed about 10 years ago. Just FYI I have had no issues with
AFCI however, these are installed on a comp roof, DC behind the
PVs is USE-2 to the adjacent combiner with THWN-2 from the
combiner to the DC disco below the inverter.</p>
<p> Is the AFCI either on or off?</p>
<p>Bill</p>
<p>Feather River Solar Electric<br>
</p>
<div class="moz-cite-prefix">On 7/22/2016 6:25 PM, Glenn Burt wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">August,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I am currently
chasing down unexplained AFCI faults with old SX 160 modules
on a metal roof and having replaced two SMA SWR-2500U’s with
a SB 5000TL-US-22. So far I have been swapping input strings
to see if there is a pattern, however no joy. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Next visit is
up on the roof (steep pitch) to see if there is anything
obvious. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I hate to
simply disable the AFCI functionality without a serious
effort, however I am approaching that point. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">It is a T&M
job for a system installed by others back in 2004, about an
hour trip 1 way and I am afraid the customer will soon
believe I am stringing out the work.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Looking forward
to hearing more of your experience as it develops!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">-Glenn<o:p></o:p></span></p>
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