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Home Powerwall with PCB V1.3
#1
Hallo
i‘m from south germany and this is my first post here!
I‘m building my own home powerwall with Jehu‘s PCB boards.
first it will be round 10kwh couse i have now only 980 new lg mg1 cells.
here some pics of stand now!

used servercase


3 x PIP‘s 5048 MG



first 2 x 1kw modules





other pics will follow

lg Karl
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#2
Looks great and Sevrus und Grüss Dich from an Oberösterreicher in Maine USA.

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



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#3
Looking good, make sure to keep your stacks under 10 boards if you can to minimize voltage drop across the brass terminals, or thread some bare copper wire through the XT-60 terminal holes and solder to each board. What BMS are you going to be using with this system?
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#4
Thank you!
I will make it with 14 boards and every one will have 2 x 6mm2 cable with ringconnectors! it should handle ~ 50 amps!!
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#5
a BMS i dont use! i take an aktive balancer!
under - and overvolt my pip‘s are controlling!!
i think that should work good!
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#6
PIP‘s are connected! Only connection to grid , battery and pv is missing!



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#7
(01-07-2019, 08:50 AM)karmi27 Wrote: a BMS i dont use! i take an aktive balancer!
under - and overvolt my pip‘s are controlling!!
i think that should work good!

Your pip's are controlling global under and over voltage not a single pack voltage, unless you have almost perfectly balanced packs or this balancer can handle a huge current while balancing, your packs will unbalance for sure, and nothing will stop charging or uncharging until the whole battery's voltage reaches the configured value.

I think a BMS is mandatory just for cutting if a single pack goes out of range.

Regards
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#8
Why should they go out of balance?!
My system is 14s70p and the balancer has over 1amp balance current! i only charge till 4.1v per cell and every pack will have the same voltage as the system voltage is!!
i think you have a litte thinking error!
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#9
Hi Karl,

Herzlich willkommen :-)

Your build is looking like that what im going to do - nice!

Im also thinking about Jehu‘s PCB boards for my build - maybe you can take
more pictures of your work. Did someone use them with batrium bms?
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#10
Hallo und grüße aus Solingen / Deutschland  Smile 

Hello and greetings from Solingen / Germany

Nice construction with 3x220v three-phase current.

I would be glad about reports from you if that runs smoothly with the controller board of the loaders.

Grüße Dirk
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