[RE-wrenches] Large current battery combiners, UL Listing

[Dana Orzel]

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- dana at solarwork.com

> On Sep 10, 2022, at 7:17 PM, Kirk Herander via RE-wrenches <re-wrenches at 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 at lists.re-wrenches.org> wrote:
>> Mac:
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>>  
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>> 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 I found.  Their product line is pretty sexy and it is listed.
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>>  
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>> If you are rolling your own, you can find ampacities for standard copper bar thicknesses someplace like here.  You might fabricate something that looks like one of these 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 which can automatically chip-clear.  Basically at this point in my life my only reason for working is to support my tool addiction.
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>> Good luck.
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>>  
>> 
>> William Miller
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>>  
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>> Miller Solar
>> 
>> 17395 Oak Road, Atascadero, CA 93422
>> 
>> 805-438-5600
>> 
>> www.millersolar.com
>> 
>> CA Lic. 773985
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>>  
>> 
>>  
>> 
>> From: RE-wrenches [mailto:re-wrenches-bounces at 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?
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>> 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?
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>> 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.
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>> Thanks!
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>> 
>> --
>> 
>>  
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>>  
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>>  
>> 
>> Mac Lewis
>> 
>> "Yo solo sé que no sé nada." -Sócrates
>> 
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> 
> 
> -- 
> Kirk Herander / kirkh at vermont.solar
> Owner|Principal, VT Solar, LLC
> Celebrating our 31st Anniversary 1991-2022!!
> www.vermont.solar
> dba Vermont Solar Engineering
> 802.863.1202
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