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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I checked the math and it indeed seems like a rounding issue – 20,000 W / 480 V / </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">√</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">3 = 24.05626122 A</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I wonder if the SMA tech support agent that Brian spoke with was just reading the manual when they said it was 24.1 A. Regardless, it seems like we would need to rely on the manufacturer to clarify their intent when the nameplate and manuals don’t match up. I had been taught to rely on the nameplate right on the device when all else fails.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hopefully no one has a situation where this actually matters! </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">August</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Luminalt</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Garrison Riegel<br><b>Sent:</b> Thursday, September 01, 2016 6:39 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] SMA Tripower</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Hi Brian,</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Can we not invoke Art. 220.5(B) Fractions of an Ampere to round down to a 30A OCPD in this case?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I suppose that .1 could be pretty significant when combining many of these inverters.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Garrison Riegel</p></div><div><p class="MsoNormal">Solar Service Inc</p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>On Aug 31, 2016, at 11:24 PM, Brian Mehalic <<a href="mailto:brian@solarenergy.org">brian@solarenergy.org</a>> wrote:</p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><p class="MsoNormal">Hey Wrenches- </p><div><p class="MsoNormal">Just a heads up on the SMA Tripower - I like the inverter, but you gotta read the install manual!</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Spec sheet says 24 A continuous output current for the 20 kW Tripower. Install manual (and tech support) says 24.1. That extra .1 A takes you from a 30 A to a 35 A breaker.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Of course you should follow the install manual not the specs. But what about the label on the side of the inverter? Well I've seen more than a handful that are labeled with a flat-out 24 Aac output current. What's an installer or inspector to do besides hope mfg's can get their numbers in order?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Upon closer examination, most of the STPs are 0.1 A higher than their spec sheet per the install manual - it doesn't really make a difference on the 12 or 15 kW models - just the 20 where you have to go up 1 standard OCPD size. Pretty sure there's lots of 20 kW units out there backfeeding a 30 A breaker. Hmmmmm....<br clear="all"></p><div><div><div><div><div><div><div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Brian Mehalic <br>NABCEP Certified Solar PV Installation Professional™ R031508-59</p></div><div><p class="MsoNormal">520.204.6639</p><div><p class="MsoNormal"> </p></div><div><div><div><p class="MsoNormal">Solar Energy International<br><a href="http://www.solarenergy.org" target="_blank">http://www.solarenergy.org</a></p></div></div></div></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">SEI Professional Services</p></div><div><p class="MsoNormal"><a href="http://www.seisolarpros.com" target="_blank"><span style="font-size:9.5pt">http://www.s</span>eisolarpros.com</a></p></div><div><p class="MsoNormal"> </p></div></div></div></div></div></div></div></div></div></div></div></blockquote><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a></p></div></blockquote></div></body></html>