<div dir="ltr">If you want to go with the transformer route, try Dongan Transformers. They've helped us a few times with tech support, and they should be able to help in this situation. <div><br><div>As I understand it though, there is a loss of efficiency when you grid-tie through an open delta. I have the same issue with a large residential installation. My client is deciding whether to upgrade his service to a 240 split phase as he doesn't need the three-phase power. Most utilities I know of are phasing out the old 240 Delta services. Pun intended. </div><div><br></div><div>Best of luck, </div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Georgia;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Vince McClellan</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Georgia;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Energy Design</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Georgia;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">NABCEP PV Installation Professional</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Georgia;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">p. </span><span style="font-size:11pt;font-family:Georgia;color:rgb(17,85,204);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">(541) 485-8122</span><span style="font-size:11pt;font-family:Georgia;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">  f. </span><span style="font-size:11pt;font-family:Georgia;color:rgb(17,85,204);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">(541) 338-8202</span></p><br><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">If you have received this email and are not the intended recipient, please delete this email. Copying or using any part, content, or attachment of this email is strictly prohibited. </span></p><div><span style="font-size:11pt;font-family:Arial;color:rgb(80,0,80);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><br></span></div></span></div></div></div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jun 6, 2023 at 10:43 AM Drake Chamberlin via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>William,</p>
<p>Sol-Ark says they can only connect to a Wye, and that they need a neutral.</p>
<p>Thanks,</p>
<p>Drake</p>
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<p id="m_-2335078100189673766reply-intro">On 2023-06-06 11:34, William Miller via RE-wrenches wrote:</p>
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<div dir="auto">Drake:</div>
<div dir="auto"> </div>
<div dir="auto">You should be able to connect to a 120/240 split phase feeder. Avoid the stinger. I have done it with FXRs , works just fine. </div>
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<div dir="auto">Wm</div>
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<div dir="ltr">On Tue, Jun 6, 2023 at 8:11 AM Drake Chamberlin via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello All,<br><br>We are looking for a transformer to connect Sol-Ark inverters to an open <br>delta service. The Sol-Ark can only connect to a Wye configuration.<br><br>We found one which the supplier says will do the job. It is an MGM, 240 <br>Delta to 208Y/120 Volt, 3-Phase.<br><br>The supplier says this will derive a neutral which can be grounded for a <br>solid neutral connection.<br><br>My concerns with what we have found so far are:<br>1) How much efficiency will be lost due to connecting to an open delta?<br>2) Will the derived neutral really be sufficient?<br>3) The cost of the unit we found is high. Does anyone know of a source <br>for economically priced transformers.<br><br>Thank you,<br><br>Drake<br><br>Drake Chamberlin<br>Athens Electric LLC<br>Ohio Electrical Contractor's License 44810<br>CO Master Electrician's License 4526<br>NABCEP Certified PV Installation Professional<br><br><br><br><br>-- <br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>Pay optional member dues here: <a href="http://re-wrenches.org" rel="noopener noreferrer" target="_blank">http://re-wrenches.org</a><br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noopener noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>There are two list archives for searching. When one doesn't work, try the other:<br><a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noopener noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br><a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noopener noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" rel="noopener noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org" rel="noopener noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br><br></blockquote>
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<span>-- </span><br>
<div dir="ltr"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com" rel="noopener noreferrer" target="_blank">www.millersolar.com</a></div>
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