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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Afternoon Wrenches,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sorry been out of the office for a week or so.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Not sure where/who/how anyone commenting on this is getting their information but, there is no compatibility issue with SMA inverters and Tigo equipment.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">There is a FW patch that some of the Tigo need (older units) to be compatible with the AFCI function.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Past that no issues.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">No inverters blowing up or anything dramatic like that, just a FW update, that’s all.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Please contact me offline if you have further questions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">SMA America, LLC<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Steve Jefferson<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Supervisor, Service Line</span></i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">6020 West Oaks Blvd, Suite 300<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Rocklin, CA 95765 - 3714<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">U.S.A.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Tel: +1 916 625 0870<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Fax: +1 916 624-2445<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Service Line +1 877 697 6283 (Toll Free)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Email: steve.jefferson@sma-america.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><a href="http://www.sma-america.com/">www.SMA-America.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">This email and any attachments thereto may contain SMA America, LLC confidential, privileged and private material for the sole use of the intended recipient.
Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email
and any attachments thereto. Thank you.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="http://www.youtube.com/watch?v=yQWzPuyqhzo&feature=youtu.be"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;text-decoration:none"><img border="0" width="432" height="90" id="Picture_x0020_7" src="cid:image001.png@01CE6768.AA8CB190" alt="cid:image003.png@01CE517D.21006940"></span></a><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Ryan<br>
<b>Sent:</b> Wednesday, June 05, 2013 5:36 PM<br>
<b>To:</b> re-wrenches@lists.re-wrenches.org<br>
<b>Subject:</b> Re: [RE-wrenches] Tigo and SMA AFCI - Was: AC coupled, grid-tied Sunny Island - contactor & bypass<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From Robin<br>
<br>
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It has been pointed out that the Tigo modules can and do blow up some charge controllers and inverters. When a charge controller or inverter has fairly fast tracking, the two units
fight each other. We have found Classics using the fast tracking mode will blow up with Tigo’s in the system. We also found that putting the Classic in the slower tracking mode, Legacy, solves the issue. We are aware that at least one major inverter model
must defeat the tracking in order not to blow up. We have not yet tested our arc fault detectors with Tigo modules, but plan on doing this in the near future. It might be possible that the Tigo modules present a signature that looks like an arc. That must
be what is happening with the SMA inverter. </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Robin</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 6/5/2013 3:33 PM, SunHarvest wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Just an FYI for anyone wanting to use Tigo optimizers with SMA inverters incorporating AFCI -</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">According to SMA the Tigo optimizers will not operate with the SMA inverters. They didn't go into detail. They just said the AFCI feature of the Sunny Boy is not compatible
with Tigo. After further discussion they acknowledged that disabling the AFCI feature in the Sunny Boy would allow compatibility with the Tigo optimizer. Awesome.</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">After talking this over with Tigo they came to the same conclusion but neither company seemed too happy or confident in the marriage. Awesome.</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Eric Stikes<br>
SunHarvest</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">----- Original Message -----
<o:p></o:p></span></p>
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<pre style="background:#E4E4E4"><b>Wrenches,<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Here's an update on this configuration (20kW Enphase, AC coupled to <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Sunny Islands) you should know about:<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>Enphase will not support and warranty the use of their micro inverters <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>in an AC-coupled installation with battery-based inverters. Enphase <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>approved this verbally with us in design, but balked when we asked <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>them to back it up in writing. Their issue/point is that AC-coupling <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>violates the UL1741 listing.<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>Thus, we're revising the design to use Sunny Boy string inverters. Our <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>customer would still like the module-level monitoring and optimization <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>offered by the micro-inverters (there is some shading issue), so we're <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>considering using string optimizers. We have not used string- <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>optimization, yet. It looks like the leading options are Solar Magic <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>and Tigo.<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>Any preferences, cautions, or advice with choosing and using <o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>optimizers would be appreciated.<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>Thanks,<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>-Kelly<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><o:p> </o:p></b></pre>
<pre style="background:#E4E4E4"><b>Kelly Keilwitz, P.E.<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Principal<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Whidbey Sun & Wind<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Renewable Energy Systems<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>NABCEP Certified PV Installer<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>WA Electrical Administrator<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>987 Wanamaker Rd.<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>Coupeville, WA 98239<o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b><span class="MsoHyperlink">kelly at whidbeysunwind.com</span><o:p></o:p></b></pre>
<pre style="background:#E4E4E4"><b>PH & FAX: 360.678.7131<o:p></o:p></b></pre>
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