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<div class="moz-cite-prefix">HI William;<br>
<br>
I think you might have a problem. Looking at Enphase's ratings,
the M190 has an output rating of 800mA, while the M250 has an
output rating of 1.0 A. 10 M250s = 10 amps, 9 M190s = 7.2 amps<br>
17.2 amps exceeds 80% of your 20 amp breaker.<br>
I know this won't actually happen, but my understanding is that
690.8 (A)(3) dictated how to figure this, and 690.8(B)(1) dictates
the 80% of breaker rating. So I think code wise, you're out of
luck, unless you have a 100% duty rated breaker and load center.<br>
<br>
My thinking is that most inspectors would give you a pass;
especially when you show them the actual current flowing with the
smaller modules. Can you put more modules per inverter, or
otherwise drop a couple of inverters?<br>
<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 10/9/2013 4:06 PM, William Miller wrote:<br>
</div>
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<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Friends:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">At
the risk of asking a question that may have been asked and
answered here in the past, I wish to pose a question about
Point of Connection.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Rather
than outline the situation here I put it all on a web page.
If any of you have a moment to review this, I would be most
appreciative.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><a
moz-do-not-send="true"
href="http://www.millersolar.com/MillerSolar/case_studies/POC/_POC_Question.html">http://www.millersolar.com/MillerSolar/case_studies/POC/_POC_Question.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Thanks
in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">William
Miller<o:p></o:p></span></p>
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