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<p class="MsoNormal">Don,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Have you contacted SunPower Technical Support yet? If you can\u2019t find what you need from third parties, some SMA inverter options might be available directly from SunPower. I\u2019m assuming the original inverters are long out of warranty, but
we may have a compatible SMA inverter available for sale. The disconnects and original mounting plates tend to be harder to come by, however.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The most important thing to ensure expected performance is that you maintain the positively grounded configuration of the array. Galvanically isolated SMA inverters have proven to be the simplest \u2013 reconfigure the jumper and fuse position
and then check the voltage and polarity of the array before you recommission.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you have any difficulty finding what you need, please feel free to contact me directly.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#007DC3">Isaac Opalinsky</span></b><b>
</b><span style="color:#007DC3">|</span> Director, Training & Field Enablement<o:p></o:p></p>
<p class="MsoNormal">mobile 443-277-6286 <span style="color:#007DC3">| </span><a href="mailto:isaac.opalinsky@sunpower.com">isaac.opalinsky@sunpower.com</a>
<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org>
<b>On Behalf Of </b>Dave Tedeyan<br>
<b>Sent:</b> Friday, March 19, 2021 11:55 AM<br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Subject:</b> [EXT] Re: [RE-wrenches] Positive grounded inverters for SunPower modules<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="color:indianred">External Email - </span></b><span style="color:black">Use caution when responding, clicking, and/or downloading attachments.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Hi Don, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">The Sunny Boy US models are able to be configured for positive ground. I have found some of them here before for replacements:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__you-2Dlove-2Dsolar.myshopify.com_search-3Ftype-3Dproduct-26q-3Dlove-2Bsolar&d=DwMFaQ&c=Kv2S0ZicsIm17HTFqYG_Og&r=RD0lHHgQqAl7xvyDm5AiPkLCedjBloPiZPB0MsAPMCE&m=YZa1_JcJnr5w9ukcZ-_jjEjuZfKlNmZoR4SnN-PPlgc&s=3ImlKgJqEu2zowuE_29WWnBMBqRy2vWJy1zCjY6YpAo&e=">https://you-love-solar.myshopify.com/search?type=product&q=love+solar</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Looks like they even have an old Sunpower one on their front page.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Cheers, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Dave<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">On Fri, Mar 19, 2021 at 11:41 AM <<a href="mailto:don@energysolarnow.com">don@energysolarnow.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">We have several older-than-10-year installs with SunPower positively grounded modules and inverters that have failed. The inverters were branded by SunPower but
made by various vendors like PVPowered and Xantrex that aren't around any more. <o:p>
</o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">We know if a negative grounded inverter is used with these SunPower modules they gather some parasitic charge that inhibits normal current flow.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I have a few used inverters with negative ground that look like they can be modified to positive ground, with the risk there is some internal software that cannot
be adjusted. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">It looks like a Fronius IG can be changed over with a software adjustment that is actually in the manual.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">What I'm wondering is whether a new ungrounded inverter can be used with these SunPower modules and keep them operating normally.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Does anyone have some pertinent experience with this?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Thanks<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Don Barch<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">-- <o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#888888">Dave Tedeyan, PE</span></b><span style="font-size:10.0pt;color:#888888"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#888888">1653 Slaterville Road, Ithaca, NY 14850<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#888888">Cell: 607-288-2898<o:p></o:p></span></p>
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