Daly BMS 4S 12V 200A in Series?

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OrganicSower

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• Feb 14, 2023

• #1

I can't find any specs on this Daly BMS to tell me if I can use four of them in separate 12V batteries to create an overall 2S2P battery bank (i.e., 24V 400A total).

Is there any confirming documentation?

I'm leery after learning that many of the JBD bms' can't be combined in series.

 

TomC4306

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• Feb 14, 2023

• #2

Don't build four 12s, build 2 24s and then parallel them

 

O

OrganicSower

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• Feb 14, 2023

• #3

TomC4306 said:

Don't build four 12s, build 2 24s and then parallel them

Click to expand...

Thanks for your reply, but that's not my question. I don't want to wrestle 100 pound 8S 24V batteries into my RV passthrough. I need to break them up into manageable 50 pound 4S 12V sizes, both for spacing and handling issues.

 

TomC4306

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• Feb 14, 2023

• #4

Your proposed configuration requires far more maintenance.

 

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OrganicSower

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• Feb 14, 2023

• #5

TomC4306 said:

Your proposed configuration requires far more maintenance.

Click to expand...

There's always trade offs.

 

V

vejeriego

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• Feb 14, 2023

• #6

I'm trying to get my head around putting two 12V BMS's in series.
Surely you end up putting 24V through a 12V device?
Can you show me a circuit diagram to show me how this works with only 12V going through the BMS?
My mental image of this indicates that both BMS's will be taking 24V.