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diy solar

Trying to built a power storage with SDI Battery

drizzt

New Member
Joined
Oct 1, 2021
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Hello everyone,
I already have 10 solar panels installed and it works great with 4 * 12v AGM batteries.

But i recently were able to buy a samsung Li Ion Storage System.
The guy who sold it to me said it was made from Samsung SDI SB (Samsung Bosch for what i found) limotive 63ah cell.
There were 18 module of 32v each and each module contains 8 cells of 4v each.

As i bought it with 2 friends i can't keep all of them. I Keep 9 modules, one friend 6, and the last one 3.

Some BMS were installed in it, but i have no idea if i can reuse them. and there is something that looks like a mother board, maybe a master bms?
As i need a system in 48v and while i have 144 cells, i think i may have to open all actual module and reorganise 12 modules of 12 cells (12 x (12x4= 48v per module)) right ?
If i can't the BMS, provided, wich one may fit that kind of configuration ?

Thanks for any information / help provided,

I will try post as many information and photos as possible so you can see all the actual elements. PS: i see that i don't have photos of the inside of the BMS, i will take some ASAP.
 

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On those batteries, you should count on the voltage as 3.7 volts per cell. You should do a capacity test to see if they will meet your needs they look to be 19 years old.
 
Thanks, i will search how to perform the capacity test on this cell and will come back after. 19 years old?? that's way much i thought...
PS : That may do the job i think :
 
48v /3.7 = 12,97 so 13 cells .

72/13 = 5 modules of 13 cells so 65 cells, plus 7 spares if needed.
 
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