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*
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