<div dir="ltr">SolarBOS can possibly make one custom for you, it will be listed, and it will not be cheap. I was going to order a 2000A w/ multiple OCPDs on both inputs and outputs from them, but then Midnite came out with a 2000A combiner, and I don't need it listed for my application.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Sep 10, 2022 at 6:15 PM William Miller 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 class="msg7353816841760408963"><div lang="EN-US"><div class="m_7353816841760408963WordSection1"><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Mac:</span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Getting listing on something as specialized as you are talking about may be difficult. I would turn to the telecom industry for solutions. Here is one <a href="https://bertholdelectric.com/dc-telecom-products/battery-termination-bars/" target="_blank">link</a> I found. Their product line is pretty sexy and it is listed.</span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">If you are rolling your own, you can find ampacities for standard copper bar thicknesses someplace like <a href="https://www.copper.org/applications/electrical/busbar/busbar_ampacities.html" target="_blank">here</a>. You might fabricate something that looks like one of <a href="https://millersolar.com/MillerSolar/Portfolio/Inverters/battery_iinverters/JP_Radian/Images/Battery_busses_open.jpg" target="_blank">these</a> but bigger. Threading is desirable so you can avoid wrangling nuts on the back sides, but tapping copper at a reasonable bolt size (likely 3/8-16) can be tricky. I am looking for any excuse to buy one of these <a href="https://www.grizzly.com/products/teknatool-18-nova-voyager-dvr-variable-speed-drill-press/t30589" target="_blank">drill presses</a> which can automatically chip-clear. Basically at this point in my life my only reason for working is to support my tool addiction.</span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">Good luck.</span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)">William Miller</span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">Miller Solar</span></p><p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">805-438-5600</span></p><p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)"><a href="http://www.millersolar.com/" target="_blank">www.millersolar.com</a></span></p><p class="MsoNormal"><span style="font-family:Arial,"sans-serif";color:rgb(31,73,125)">CA Lic. 773985</span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><span style="font-family:Verdana,"sans-serif";color:rgb(31,73,125)"> </span></p><p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,"sans-serif"">From:</span></b><span style="font-size:10pt;font-family:Tahoma,"sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Mac Lewis via RE-wrenches<br><b>Sent:</b> Thursday, September 8, 2022 8:46 PM<br><b>To:</b> RE-wrenches<br><b>Cc:</b> Mac Lewis<br><b>Subject:</b> [RE-wrenches] Large current battery combiners, UL Listing</span></p><p class="MsoNormal"> </p><div><p class="MsoNormal">Hello Wrenches,</p><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Is anyone aware of a high current, (~3000A DC rated, 48Vdc nominal) battery combiner panel that would allow for ~36-48 x 4/0 cables to connect?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Seems like nothing will be close to UL listed on this. How do you go about building a 60 kW off-grid system on the battery side of things? Do I need to increase battery voltage design?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I have gotten a custom busbar fabricated by Storm Power rated for about 2kA before, but I'd love to have a UL Listed solution for large battery combining. Any suggestions are appreciated.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Thanks!</p><div><div><p class="MsoNormal"> </p></div><p class="MsoNormal">-- </p><div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><p class="MsoNormal" style="margin-bottom:12pt">Mac Lewis<b><span style="font-family:Arial,"sans-serif";color:rgb(255,153,0)"></span></b></p><p><span style="color:rgb(48,90,120)">"Yo solo sé que no sé nada." </span><b><span style="color:rgb(104,104,104)">-Sócrates</span></b><b><span style="font-family:Arial,"sans-serif";color:rgb(255,153,0)"></span></b></p></div></div></div></div></div></div>
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</div></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a name="SignatureSanitizer__MailAutoSig"><b>Kirk Herander / </b></a><b><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" target="_blank">kirkh@vermont.solar</a></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b>Owner|Principal, VT Solar, LLC</b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b><i>Celebrating our 31<sup>st</sup> Anniversary 1991-2022!!</i></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a href="https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0" title="Click to open in a new window or tab
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