<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Verdana","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Mac:</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">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/">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:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">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">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">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">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:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Good luck.</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">William Miller</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Miller Solar</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">805-438-5600</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><a href="http://www.millersolar.com/">www.millersolar.com</a></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">CA Lic. 773985</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><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:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">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:12.0pt">Mac Lewis<b><span style="font-family:"Arial","sans-serif";color:#ff9900"></span></b></p><p><span style="color:#305a78">"Yo solo sé que no sé nada." </span><b><span style="color:#686868">-Sócrates</span></b><b><span style="font-family:"Arial","sans-serif";color:#ff9900"></span></b></p></div></div></div></div></div></body></html>