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<div>Hi Brian,</div>
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<div>Can we not invoke Art. 220.5(B) Fractions of an Ampere to round down to a 30A OCPD in this case?</div>
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<div>I suppose that .1 could be pretty significant when combining many of these inverters.</div>
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<div>Garrison Riegel</div>
<div>Solar Service Inc</div>
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On Aug 31, 2016, at 11:24 PM, Brian Mehalic <<a href="mailto:brian@solarenergy.org">brian@solarenergy.org</a>> wrote:<br>
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<div dir="ltr">Hey Wrenches-
<div>Just a heads up on the SMA Tripower - I like the inverter, but you gotta read the install manual!</div>
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<div>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.</div>
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<div>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?</div>
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<div>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">
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<div>Brian Mehalic <br>
NABCEP Certified Solar PV Installation Professional™ R031508-59</div>
<div>520.204.6639<br>
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<div>Solar Energy International<br>
<a href="http://www.solarenergy.org" target="_blank">http://www.solarenergy.org</a></div>
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<div>SEI Professional Services</div>
<div><a href="http://www.seisolarpros.com" target="_blank"><span style="font-size:12.8px">http://www.s</span>eisolarpros.com</a><br>
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