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Instant powerwall
#71
are the cells fused?
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#72
according to the pictures, they are all fused.

why did you go with 5 lines of the Busbars intead of 3? for each pack?
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#73
(01-10-2018, 02:40 AM)River Ryan Wrote: are the cells fused?

Yes, they are fused, only on the positive side. I did not fused the negative for structurally reasons, the cells are a bit loose in there holders, the wire i use at the negative side is 0.75mm2 and keep the cells from rotating in the holders.




(01-10-2018, 07:13 AM)Roland Domke Wrote: ...
why did you go with 5 lines of the Busbars intead of 3? for each pack?

A few reasons... Smile

1) The inverter i use is able to draw about 300A from the battery, up until now i have 2 strings of 14s90p ( nr3 in progress ). The busbars are 6mm2, good for 30A each, 5x30A is 150A, so with 2 strings wired for 150A, it would be possible to draw 300A... it never did, but it is safe to do.
The max cell discharge is 10A (Panasonic specs) and with 90 cells in parrallel, they have no problem to deliver those 150A/string.

2) The packs are build with both terminals at the same side, it would be better if they where on opposit sides... to prevent a higer load on the front cells, i added busbars to lower resistance on high currents.

3)  The busbars are also kind of heat-sink, my storage closet has compartments, great for fire resitance, but not for ventilation.... the ventilation is in the front, where all the copper is, and in my mind, the busbars could transfer heat to the front of the closet. There is no need for ventilation afterall, but ... well ... meh.

4) It looks more complicated...  Tongue
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___________________________________
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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#74
(01-09-2018, 02:28 PM)wim Wrote: Green very green... looks like "glow in the dark" (i did check, but no luck) Wink
If you're really up for it, you could add escape route paint. It's phosphor luminescent paint so it will glow in the dark after being exposed to light  Tongue
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#75
Done soldering !!!
Always nice to have this part finished... Smile

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___________________________________
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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#76
Beautiful work!
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#77
I'm thinking that you could do this full time and sell the packs for profits Wink
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Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
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#78
Ok.... now you have done it !! Gonna call my boss first thing tomorrow morning and quit my job... Wink

So if anyone want packs, you can put your orders below.... Big Grin
Korishan, Wattsup, Stingy49 And 1 others like this post
___________________________________
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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#79
Due to lack of orders, i have decided to keep my dayjob... Tongue
SecondHandPower and Stingy49 like this post
___________________________________
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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#80
What amp rating is your fuse wire Wim, sorry if you already mentioned it
                                                Choose LiFe  Wink

                      May all your batteries be fully charged and perfectly balanced  Cool
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