<div dir="ltr">Hi Marco,<div><br></div><div>SMA may have a solutions for this called the PV offset box. I think it would allow the negative ground without the degradation.</div><div><br></div><div><a href="http://files.sma.de/dl/15437/PVOFFSETBOX-DEN1444-V10web.pdf">http://files.sma.de/dl/15437/PVOFFSETBOX-DEN1444-V10web.pdf</a></div><div><br></div><div>I have never used this but thought it was an interesting product.</div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Aug 11, 2018 at 2:29 PM Marco Mangelsdorf <<a href="mailto:marco@pvthawaii.com">marco@pvthawaii.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Jerry,<div><br></div><div>I'm talking about the need to ground one of the current carrying conductors back to earth, not the metal equipment frame.</div><div><br></div><div>The SunPower pre-Maxeon cells required that the positive conductor be grounded. Which is not possible with TL inverters. </div><div><br></div><div>There's no safety issue to let these older SPR arrays float. But the so called surface polarization effect equals an output loss of 25 or more percent. </div><div><br></div><div>As transformer based inverters fail, us SunPower dealers will be in more and more of a pinch. </div><div><br></div><div>marco<br><br>On Friday, August 10, 2018, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Marco</div><div>Am I missing something, all arrays are grounded even in Hawaii, I have systems using the SMA Tripowers and ABB Trios, they are required to be grounded and tested as so. Now if the modules "Leak" this can cause resistance leaks in the array, its like a GFI. I have had issues with inverters in Hawaii along with other areas tripping out due to low resistance to earth, it can be the backing leaking, also from the edge of the module. SunPower Modules are still grounded just on the other side. <br></div><div>Jerry<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 9, 2018 at 3:15 PM, Marco Mangelsdorf <span dir="ltr"><<a href="mailto:marco@pvthawaii.com" target="_blank">marco@pvthawaii.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal">Hi all,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I\u2019m in need of a vintage Xantrex 30 kW (PV 30208)
inverter.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Anyone happen to have one or know of someone who might?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Can\u2019t use a TL because the array needs to be grounded.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Mahalo,<u></u><u></u></p>
<p class="MsoNormal">marco<span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>