[RE-wrenches] Enphase commercial

[SunHarvest]

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

  nathan at arcticsun-llc.com  | (907) 457-1297

  www.reina-llc.com | www.arcticsun-llc.com



   

  From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at 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



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