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<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>Jeff Y wrote: <FONT color=#000000>Yes, I guess its possible
a local county can make up their own rules, but I am not aware of any
requirement in the NEC</FONT></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>Jeff, this sounds like a job for Donuts! It sounds
like their position is possibly based on a local requirement or perceived
requirement, independent of the NEC. It is also possible that they have
not adopted the 2008 NEC or become familiar with it yet. Either way,
donuts sooth a savage beast...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>William Miller cited 2008 NEC 690.10 Stand-Alone Systems,
which would be a good place to start. It specifically permits applications
such as the one you described, as long as there is PV and the premises AC
wiring is supplied via an inverter... <EM>(690 only applies to PV)</EM>
There is an explanatory note in the NEC Handbook that helps drive the point
home. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>I would backup <EM>(no pun intended) </EM>690.10 with 2008
NEC 705 Interconnected Electric Power Production Sources. 705.2
Definitions describes your application as a Hybrid System.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2><EM><STRONG>2008 NEC 705.2 Definitions.<BR>Hybrid
System.</STRONG> A system comprised of multiple power sources. These power
sources could include photovoltaic, wind, micro-hydro generators, engine-driven
generators, and others, but do not include electric power production and
distribution network systems. Energy storage systems such as batteries,
flywheels, or superconducting magnetic storage equipment do not constitute a
power source for the purpose of this definition.</EM></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>I recommend studying up on 705 and making sure the proposed
design complies before running down to the permit counter with donuts. In
particular, a hybrid system <STRONG>does not include</STRONG> "Energy storage
systems such as batteries", which basically means that as long as you are
running the premises loads on AC, you should be fine. <EM>(The inverter
output is the Energy Source for the loads).</EM> </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2> </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275700-15112008><FONT face=Arial
color=#0000ff size=2>Best of luck to the homeowner!</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left><EM><FONT face="Monotype Corsiva" size=4><STRONG>Matt
Lafferty</STRONG></FONT></EM></DIV></BODY></HTML>