We've gotten around needing UL listings for one-off in house fabrication by running things through a licensed engineer. Right now we are building a gutter bus which has two 1/2" x 4" x 20' copper bars in a 10" x 10" gutter. We are using 2" x 9" x 9" UDPM plates with slots routed out for the bars as insulators. This is for 24 Discover AES and 8 Sol-Ark's. It usually costs about 1K to have an engineer sign off on our designs.
I'd be interested in learning tricks for tapping 3/8" in thick copper. I've never been able to get consistent results and resort to thru-bolting. On Sun, Sep 11, 2022 at 4:49 AM Dana Orzel via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > You might possibly check with Northwest energy storage all of their hup > solar one batteries come with solid copper bars lead plated I don’t know > what the ampacities are but Rob might be able to assist you there > > Dana Orzel > C: 208.721.7003 > E- d...@solarwork.com > > On Sep 10, 2022, at 7:17 PM, Kirk Herander via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > > 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. > > On Sat, Sep 10, 2022 at 6:15 PM William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Mac: >> >> >> >> 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 link >> <https://bertholdelectric.com/dc-telecom-products/battery-termination-bars/> >> I found. Their product line is pretty sexy and it is listed. >> >> >> >> If you are rolling your own, you can find ampacities for standard copper >> bar thicknesses someplace like here >> <https://www.copper.org/applications/electrical/busbar/busbar_ampacities.html>. >> You might fabricate something that looks like one of these >> <https://millersolar.com/MillerSolar/Portfolio/Inverters/battery_iinverters/JP_Radian/Images/Battery_busses_open.jpg> >> 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 drill >> presses >> <https://www.grizzly.com/products/teknatool-18-nova-voyager-dvr-variable-speed-drill-press/t30589> >> which can automatically chip-clear. Basically at this point in my life my >> only reason for working is to support my tool addiction. >> >> >> >> Good luck. >> >> >> >> William Miller >> >> >> >> Miller Solar >> >> 17395 Oak Road, Atascadero, CA 93422 >> >> 805-438-5600 >> >> www.millersolar.com >> >> CA Lic. 773985 >> >> >> >> >> >> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On >> Behalf Of *Mac Lewis via RE-wrenches >> *Sent:* Thursday, September 8, 2022 8:46 PM >> *To:* RE-wrenches >> *Cc:* Mac Lewis >> *Subject:* [RE-wrenches] Large current battery combiners, UL Listing >> >> >> >> Hello Wrenches, >> >> >> >> 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? >> >> >> >> 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? >> >> >> >> 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. >> >> >> >> Thanks! >> >> >> >> -- >> >> >> >> >> >> >> >> Mac Lewis >> >> "Yo solo sé que no sé nada." *-Sócrates* >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> > > -- > > *Kirk Herander / **kirkh@vermont.solar <kirkh@vermont.solar>* > > *Owner|Principal, VT Solar, LLC* > > *Celebrating our 31st Anniversary 1991-2022!!* > > *www.vermont.solar* > <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> > > dba Vermont Solar Engineering > > 802.863.1202 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- Michael Morningstar Morningstar Electric PO Box 1494 Mount Shasta, CA 96067 530-921-0560 mjmornings...@gmail.com
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org