[RE-wrenches] Enphase commercial

[Nick Soleil]

Hi Eric,

We did work together at APS.  I hope life has been treating you great.

We do have a commercial design guide which can help you with all of your
questions. Feel free to reach out to me directly with any specific
questions You may have.  The design guide is available at on our website
under downloads, technical briefs, Commercial System Design with M215s.
You should be able to find it at;
http://enphase.com/global/resources/geo_us/.  The document should also be
attached.

As Nathan mentions, a three-phase system's current calculation includes a
√3 factor (1.732).  I find the easiest way to calculate the current in a
three-phase system is;
Amperage = # of microinverters * 215w / 208 / 1.732

So the current for a system with 25 M215s would be calculated at 14.92A.
There is an additional 1.25 safety factor for the over-current protection
device, of course.
25 * 215w / 208 / 1.732 = 14.92A x 1.25 = 18.64A.




On Thu, Oct 3, 2013 at 11:52 AM, SunHarvest <eric at harvesthesun.com> wrote:

> **
> 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 at 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
>
>
>


-- 

Cordially,

*Nick Soleil*

*Field Applications Engineer
*

*Enphase Energy*

Mobile: (707) 321-2937


**

*Enphase Commercial Solar.*
*Limitless.*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

*
*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

1420 North McDowell

Petaluma, CA 94954

www.enphase.com <http://www.enphaseenergy.com/>

P: (707) 763-4784 x7267

F: (707) 763-0784

E: nsoleil at enphaseenergy.com

[image: nabcep logo] Certified Solar PV Installer #03262011-300

“Don’t get me wrong: I love nuclear energy! It’s just that I prefer fusion
to fission. And it just so happens that there’s an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it’s wireless! .”

- William McDonough



This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20131004/2b457507/attachment-0004.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 1981 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20131004/2b457507/attachment-0004.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Enphase-Application-Note-Commercial-System-Design-for-M215.pdf
Type: application/pdf
Size: 2940280 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20131004/2b457507/attachment-0007.pdf>