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First Powerwall Build
#1
I'll go ahead a start a build thread even though there isn't a whole lot to add to it yet. I'll update this as I progress and once our new house is built I'll document the install process. Initially, I had decided on running a 7s system, but now am weighing the option of 14s. I do know that I will be running a Batrium system but I'm going to wait until its a bit closer to install time for all of that. I'm open to suggestions, tips, hell even criticism is welcome as I have never started a lithium project this big before. 

So far, all I have is my first bank of 7 60p packs assembled only one of which is fused and bus framed.
 

I had originally thought I would use XT connectors for each pack, but I came across some decommissioned lithium jump starter packs for free, so I'm robbing the EC5 connectors with the 10 gauge silicone wire already soldered instead.
mr_hypno, Stramon, Korishan And 2 others like this post
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#2
No criticism here ... yet ...  Angel

looking good...
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#3
EC5's are a good conector. Nice and tight and they can carry quite a bit of current
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#4
I have EC5 connectors on my 4s120p pack. If I did it all over again I would have just used crimp ring lugs. The EC5s are great and all but they are a P.I.T.A. to work with and take too much time to make them work.
8.5KWH14s66p Cartridge Wall
3KWH 7 Stack Nissan Leaf Modules
3.5KWH 4s120p  

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#5
I got the first bank all fused up over the weekend.

Korishan, zag2me, completelycharged like this post
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#6
Looks great, although those connectors look a bit brittle and easily breakable to me.

Very nice and tidy though.

What gauge copper did you use for the bus bars?
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#7
The bus bars are 1/8” solid copper. I’m not planning on running these packs under any kind of extreme load. I’m thinking an upper limit of 2kW. That divided by 7 packs and then by 2 bars each should keep the max current at 40ish amps. As for the connectors, I’m not totally sold on them either, but they were free.
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#8
Beautiful and clean design. Nice work.
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#9
(06-29-2018, 02:43 PM)EP3R-T Wrote: I'll go ahead a start a build thread even though there isn't a whole lot to add to it yet. I'll update this as I progress and once our new house is built I'll document the install process. Initially, I had decided on running a 7s system, but now am weighing the option of 14s. I do know that I will be running a Batrium system but I'm going to wait until its a bit closer to install time for all of that. I'm open to suggestions, tips, hell even criticism is welcome as I have never started a lithium project this big before. 

So far, all I have is my first bank of 7 60p packs assembled only one of which is fused and bus framed.
 

I had originally thought I would use XT connectors for each pack, but I came across some decommissioned lithium jump starter packs for free, so I'm robbing the EC5 connectors with the 10 gauge silicone wire already soldered instead.
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#10
Is 10 gauge wire the same as 10 awg wire ?
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