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Is your array on a large metal roof, or is it where intense radio signals
could be getting picked up by your racking? Either of these conditions
could potentially be your problem.<br><br>
At 01:37 PM 11/10/2016, you wrote:<br>
<blockquote type=cite class=cite cite="">Daryl, <br>
That is what I thought at first. Very rare, but I suppose not impossible
that IÂ <br>
would have two inverters with bad arc fault detectors. But since we are
still<br>
getting arc faults after replacing the inverters, I am thinking that it
must be<br>
something else.<br><br>
Cheers, <br>
Dave<br><br>
<br>
<font face="arial"><b>--<br><br>
Dave Tedeyan</font><br>
Project Engineer<br>
</b><br>
<b>Taitem Engineering, PC<br>
</b>109Â S. Albany Street, Ithaca, NY 14850<br>
Voice:Â <a href="??">(607) 277-1118 x121</a><br>
<a href="http://www.taitem.com/">www.taitem.com</a><br>
<br>
On Thu, Nov 10, 2016 at 1:18 PM,
<<a href="mailto:penobscotsolar@midmaine.com">
penobscotsolar@midmaine.com</a>> wrote:<br>
<dl>
<dd>There is at least one company (nameless at this point, but not SMA)
that<br>
<dd>has been providing replacements for swapping out faulty arc
fault<br>
<dd>detectors in their inverters. Could it be possible you have a
bad<br>
<dd>detector?<br><br>
<dd>Daryl<br><br>
<br><br>
<dd>> Hi All,<br>
<dd>><br>
<dd>> Maybe someone will have some ideas for why a couple inverters
keep arc<br>
<dd>> faulting:<br>
<dd>><br>
<dd>> -There are two SB7000TL-22 inverters, Sunpower branded.<br>
<dd>> -3 Strings of 7 SPR-327's to each inverter. Kept separate until
the<br>
<dd>> inverter.<br>
<dd>> -Ground mount about 50' from the shed where the inverters are
located<br>
<dd>> (indoors)<br>
<dd>> -Simple grid connected system, no batteries.<br>
<dd>> -There is a whole house generator co-located in the shed.<br>
<dd>> -We interconnect by using piercing taps on the line side of the
generator<br>
<dd>> transfer switch<br>
<dd>> -There has been only one power outage there since the system was
installed<br>
<dd>> in April, but the generator fires up weekly.<br>
<dd>><br>
<dd>> -The arc faults have been happening on both inverters. Sometimes
only one<br>
<dd>> at a time, sometimes both will go within a day of each
other.<br>
<dd>> -The events have been approximately one a month, but sometimes
more,<br>
<dd>> sometimes less.<br>
<dd>><br>
<dd>> -We have already checked every single connection in the system
twice, by<br>
<dd>> two different people.<br>
<dd>> -We have replaced the underground wires (and they looked just
fine)<br>
<dd>> -We have replaced all home runs.<br>
<dd>> -We have replaced both inverters.<br>
<dd>> -Arc faults are still happening.<br>
<dd>> -Arc faults are not always on the same day/time of the
week.<br>
<dd>><br>
<dd>> I am wondering if this can be caused by the generator?<br>
<dd>> Has anyone run into a situation like this or something
similar?<br>
<dd>><br>
<dd>> Thanks for your help,<br>
<dd>> Dave<br>
<dd>><br>
<dd>> *--*<br>
<dd>><br>
<dd>><br>
<dd>> *Dave Tedeyan*<br>
<dd>> *Project Engineer*<br>
<dd>><br>
<dd>> *Taitem Engineering, PC*<br>
<dd>> 109 S. Albany Street, Ithaca, NY 14850<br>
<dd>> Voice: <a href="tel:%28607%29%20277-1118%20x121">(607) 277-1118
x121</a><br>
<dd>> <a href="http://www.taitem.com">www.taitem.com</a><br>
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