[RE-wrenches] GT with BB

[frenergy]

I'm sure Storm Power Components would have done an excellent job of 
fabbing what we needed but we didn't have the time to work through their 
lengthy design/quote/build process.  So the bus bars we used were 
purchased from Mcmaster-Carr 
https://www.mcmaster.com/products/bus-bars/       they arrived in two days.

Bending and drilling the bus bar we used was not that difficult, though 
you really need to plan out what you're doing ahead of time.  An 
advantage of having two rows of batteries is the amperage in and out at 
the paired 4/0 connections immediately gets halved.

Bill

Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.(shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530.284.1925 Office/ 530.258.1641 Cell
CA Lic 874049
Solar powered since 1982
Home of the Sunny side up

On 9/25/2023 11:29 AM, Amos Post via RE-wrenches wrote:
> Hi Bill,
>
> I’m curious where you source your bussing and/or especially the 
> “bridge” pieces?
>
> Thanks,
> Amos
>
>
>        Amos Post
> Integrity Energy
>   W 802.763.7023
>    C 802.291.2188
> ienergyVT.com <http://www.ienergyvt.com>
> Facebook <https://www.facebook.com/integrityenergyllp?ref=hl>
>
>> On Sep 22, 2023, at 7:45 PM, Jay via RE-wrenches 
>> <re-wrenches at lists.re-wrenches.org> wrote:
>>
>> Hi Bill
>>
>> Looks good to me!
>>
>> I like the idea of all the copper/connections behind a plexiglass 
>> dead front. Makes a lot of sense and seems safe.
>> I’m wondering what your inspectors say about it or how you convince 
>> them?
>>
>> It’s definitely got me thinking about doing a job I have in mind with 
>> buss bars and plexi dead front vs 4/0 cable.
>>
>> Jay
>>
>>> On Sep 21, 2023, at 9:25 PM, frenergy via RE-wrenches 
>>> <re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>> Jay,
>>>
>>>            I sent a diagram of my proposed arrangement and bus sizes 
>>> to SimpliPhi prior to installation, which they approved. The buses 
>>> (copper 11000) running across the terminals are 1 1/2" X 3/16", they 
>>> have a rating of 480 amps.  The "bridge" buses are 2" X 3/16" with a 
>>> rating of 610 amps.  The greatest possible charge-discharge on this 
>>> pack will be ~327 amps which is only 16 amps per battery.  Typically 
>>> the max supply is 11.5 amps, loads are less (1, 8048 Radian). The 
>>> inverter cables are pairs ( +& -) of 4/0. Picture attached.
>>>
>>>             I'm never going to reach the 30 degree C. rise in temp 
>>> with these amperages. The reasoning was the amps moving to each 
>>> battery is so small that even though the batteries at the ends of 
>>> the buses have more bus to move through, they are so over-sized that 
>>> there would be a negligible difference in voltage, small enough for 
>>> the BMS to handle.
>>>
>>>            I guess the answer to your question is send your proposal 
>>> to the battery manufacturer, there are charts all over the internet 
>>> for bus ampacities. The final touch on the way for this installation 
>>> is a full sheet of plexiglass mounted on the front of the pack with 
>>> multiple stand-offs. BTW, the structural is #1, 4 X 6" doug fir, its 
>>> a 76 Kwhr pack to 100% DOD. We do a lot of car charging around here.
>>>
>>> Bill
>>>
>>> Feather River Solar Electric
>>> Bill Battagin, Owner
>>> 4291 Nelson St.(shipping)
>>> 5575 Genesee Rd. (USPS, UPS)
>>> Taylorsville, CA 95983
>>> 530.284.1925 Office/ 530.258.1641 Cell
>>> CA Lic 874049
>>> Solar powered since 1982
>>> Home of the Sunny side up
>>>


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