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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">William,
<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">What is your string configuration? The SMA TL inverters have a very low operating voltage window, going down to 125 Vdc, but you still have the issue of the
disconnect.<o:p></o:p></span></p>
<p class="MsoNormal"><img width="242" height="192" id="Picture_x0020_1" src="cid:image001.png@01CFE248.3F9A1920"><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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Have you looked at ABB’s (PowerOne) TL inverters:</span>
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.abb.us/product/us/9AAC179447.aspx?country=US">http://www.abb.us/product/us/9AAC179447.aspx?country=US</a>? They can be programmed to operate down to 90 Vdc,
and they give you the ability to combine upstream and have the 2 MPPT’s operate as one, allowing you to combine outside of the inverter and bring a single set of PV output conductors to the inverter’s DC disconnect:
<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>
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<p class="MsoNormal" style="line-height:12.0pt;text-autospace:none"><b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">Isaac Opalinsky
</span></b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">| Technical Trainer |
<b>SunPower Corporation<o:p></o:p></b></span></p>
<p class="MsoNormal" style="line-height:12.0pt;text-autospace:none"><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#5F5F5F">Desk 443-569-3476 | Cell 443-277-6286<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"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Tuesday, October 07, 2014 12:01 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] TL inverter with long DC Feeder<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Friends:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If only an SMA would work here. But DC volts too low. We are using Solectria PVI5200TLS. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We do not use PV wire. We transition to THWN-2 in conduit immediately. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">William<o:p></o:p></p>
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<p class="MsoNormal"><br>
Miller Solar<o:p></o:p></p>
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On Oct 6, 2014, at 8:30 PM, Chris Mason <<a href="mailto:cometenergysystems@gmail.com">cometenergysystems@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">I presumed SMA TL series. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Oct 6, 2014 at 10:02 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<o:p></o:p></p>
<p>As i read the thread you say TL which TL SMA, AE ect. They have defferent dc input designs<o:p></o:p></p>
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<p class="MsoNormal">On Oct 6, 2014 12:21 PM, "jay peltz" <<a href="mailto:jay@asis.com" target="_blank">jay@asis.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">I do believe the outback and midnite combiners have a lock hole to prevent exactly your concern.<o:p></o:p></p>
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<p class="MsoNormal">unauthorized access.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">jay<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">peltz power<o:p></o:p></p>
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<p class="MsoNormal">On Oct 6, 2014, at 11:40 AM, William Miller wrote:<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Wrenches:</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">We are getting up to speed on using transformer-less inverters. I have advocated long for the additional safety offered by these inverters but I am realizing the trade-offs with the new technology:
The implementation gets more complicated with the requirement for PV wire, OCPD and disconnecting means for plus and minus and plus providing Arc Flash rated equipment.</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I am currently designing a system that will locate the PV about 400 feet from the residence. The system will utilize 2 Solectria 5200 watt inverters at the residence. I would like to provide
disconnecting means for the 4 strings at the array, in case of any needed service or excavating. Preferably I’d like the disconnecting means to be deployable by a lay person (i.e. the gardener).</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy. I could install an Outback 8 circuit combiner with 8 touch-safe fuse holders. The new combiners have had dead-fronts for
a while now. The gardener needs only to have a Philips screw driver to open this cover. Any better ideas out there?</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Thanks,</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">William</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><image002.jpg><br>
Lic 773985<br>
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="http://www.millersolar.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">millersolar.com</span></a></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><br>
<a href="tel:805-438-5600" target="_blank">805-438-5600</a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Chris Mason<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#888888">NABCEP Certified Solar PV Installer™</span><span style="color:#888888"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#888888">Generac Generators Industrial technician</span><span style="color:#888888"><o:p></o:p></span></p>
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