That works. Thanks Nathan! Eric
----- Original Message ----- From: Nathan Stumpff To: RE-wrenches Sent: Thursday, October 03, 2013 12:28 PM Subject: Re: [RE-wrenches] Enphase commercial Hi Eric, It is 25 inverters on a 20A circuit, but only on 208 three phase. Each micro connects to the cable in an alternating way (L1/L2, then L2/L3, then L3/L1, etc.) so with 25 micros there are either 8 or 9 micros on each combination. 9 x 1.0 A x 1.732 (square root of 3) x 1.25 = 19.48 A = 20 A breaker Cheers, -Nathan -- Nathan J. Stumpff NABCEP Certified PV Installation Professional #091209-175 NABCEP Certified Solar Heating Installer #032412-14 Project Manager | Arctic Sun, LLC nat...@arcticsun-llc.com | (907) 457-1297 www.reina-llc.com | www.arcticsun-llc.com From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of SunHarvest Sent: Thursday, October 03, 2013 10:52 AM To: RE-wrenches Subject: [RE-wrenches] Enphase commercial Hey Wrenches & Nick Soleil (with whom I worked at APS for a time I believe...), I'm not familiar with Enphase commercial applications and am currently working through a commercial design. Enphase, on their M215 datasheets claim up to 25 micros per branch, at 1.0A each, with each branch terminating at a 20A breaker. By my calculations, 25 micros at 1.0A each (25A*1.25=31.25A) need to terminate at a 40A breaker. Anyone know what I'm missing or know how the 20A breaker design gets past the AHJ? Eric Stikes SunHarvest (530) 798-3738 ------------------------------------------------------------------------------ _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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