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<DIV dir=ltr align=left><SPAN class=312001205-30032011><FONT color=#0000ff
size=2 face=Arial>I think Kent and I agree. For the case where the subpanel
is not dedicated a PV sub-panel he is calculating for 2 - 50A breakers and I
calculated for 3 - 50A breakers.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><BR><SPAN lang=en-us><FONT size=2 face=Arial>Mark
Frye</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Berkeley Solar
Electric Systems</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>303
Redbud Way</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada
City, CA 95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2
face=Arial>(530) 401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Kent
Osterberg<BR><B>Sent:</B> Tuesday, March 29, 2011 9:26 PM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] sizing a sub-panel used to
combine multiple inverter outputs<BR></FONT><BR></DIV>
<DIV></DIV>Per 705.12(D) the sub-panel could be any distribution equipment on
the premises. So the question becomes: is the sub-panel capable of supplying
branch circuits or feeder loads? If yes, then the sum of the breakers
(potentially) feeding the bus is 180 amps so a 150-amp rating is required and
the inverters would have to feed the opposite end of the bus bars. If no, the
code is not clear on the requirement, but obviously the 80-amp breaker in the
main panel limits the maximum current flowing through the sub-panel.
<BR><BR>Kent Osterberg<BR>Blue Mountain Solar<BR><!--[if gte mso 9]><xml>
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