<div dir="auto">Wrenches, William<div dir="auto">I did a few back up systems for data hubs, we had 250+ kWhr systems. We had to have a firewall between the batteries and everything else. We used copper stock 1/2 x 2" and 20' long, each bank connected to the buss with its own 250 a breaker, the buss was above the batteries mounted to SS strut using 1000 volt insulators on both positive and negative. The power conditioners were on the opposite side of the wall again all connected to the buss going to each unit and again protected. Was very clean, no line loss, very clean and was duplicated in several locations. We also had a 125 k cummins genny outside that would take over to keep us all connected.</div><div dir="auto">Jerry</div><div dir="auto">PS, we did not tap and we used brass bolts and nuts, l dont recall why but it may have not been able to torg enough.</div><div dir="auto"> </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Dec 2, 2022, 12:42 PM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Colleagues:</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">I am gearing up to tap some more copper. I assume this is a pertinent subject since bus bars are going to be needed frequently for any storage work.</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">I bought the fancy drill press with the tapping function and I am setting it up. I ran a few tests and the functionality of the tool is pretty amazing. I still need to work on programming it to reverse when needed. I am close. I also ordered a cross vise for part holding.</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">I found this <a href="https://www.youtube.com/watch?v=bkrUzGooA9k&ab_channel=HaasAutomation%2CInc." rel="noreferrer noreferrer" target="_blank">tutorial</a> on line that has provided me with some valuable insight on different styles of taps. </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</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/" rel="noreferrer noreferrer" target="_blank"><span style="color:blue">www.millersolar.com</span></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" rel="noreferrer noreferrer" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Michael Morningstar via RE-wrenches<br><b>Sent:</b> Monday, September 12, 2022 7:39 PM<br><b>To:</b> RE-wrenches<br><b>Cc:</b> Michael Morningstar<br><b>Subject:</b> Re: [RE-wrenches] Large current battery combiners, UL Listing</span></p><p class="MsoNormal"> </p><div><p class="MsoNormal">No, I haven't. I'll do some testing tomorrow as we have 60 holes/taps to do in the above mentioned bussing</p></div><p class="MsoNormal"> </p><div><div><p class="MsoNormal">On Mon, Sep 12, 2022 at 7:54 AM frenergy via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:</p></div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><p class="MsoNormal" style="margin-bottom:12.0pt">Michael,<br><br> Are you using kerosene as a cutting fluid? We've had <br>better luck with that in softer than steel metals.<br><br>Bill<br><br>Feather River Solar Electric<br>Bill Battagin, Owner<br>4291 Nelson St.<br>Taylorsville, CA 95983<br>530.284.7849<br>CA Lic 874049<br><br>On 9/11/2022 7:00 PM, Michael Morningstar via RE-wrenches wrote:<br>> We've gotten around needing UL listings for one-off in house <br>> fabrication by running things through a licensed engineer. Right now <br>> we are building a gutter bus which has two 1/2" x 4" x 20' copper bars <br>> in a 10" x 10" gutter. We are using 2" x 9" x 9" UDPM plates with <br>> slots routed out for the bars as insulators. This is for 24 Discover <br>> AES and 8 Sol-Ark's. It usually costs about 1K to have an engineer <br>> sign off on our designs.<br>><br>> I'd be interested in learning tricks for tapping 3/8" in thick copper. <br>> I've never been able to get consistent results and resort to <br>> thru-bolting.<br><br><br>-- <br>This email has been checked for viruses by Avast antivirus software.<br><a href="http://www.avast.com" rel="noreferrer noreferrer" target="_blank">www.avast.com</a><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://re-wrenches.org</a><br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" rel="noreferrer 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="noreferrer 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="noreferrer 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="noreferrer 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="noreferrer 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="noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a></p></blockquote></div><p class="MsoNormal"><br clear="all"></p><div><p class="MsoNormal"> </p></div><p class="MsoNormal">-- </p><div><div><p style="margin:0in;margin-bottom:.0001pt;min-height:22px"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">Michael Morningstar</span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif""> </span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">Morningstar Electric</span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">PO Box 1494</span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">Mount Shasta, CA 96067</span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">530-921-0560</span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif""><a href="mailto:mjmorningstar@gmail.com" rel="noreferrer noreferrer" target="_blank">mjmorningstar@gmail.com</a></span></p><p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif""><img border="0" width="200" height="118" id="m_7219757532171988556m_1682636074087157317_x0000_i1025" src="https://ci3.googleusercontent.com/mail-sig/AIorK4xkNeAOHZC3SDnZTmnhgML4JHyGwi0PdmG_TrSHASBRfwJtZqGi7vknpXAngaaiawfnr5xCF1Y"></span></p></div></div></div></div>
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