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'Series-parallel' vs 'parallel-series'?


Crankshaft

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I have 4 x 200AH 12 volt batteries that must be connected for a 24 volt inverter.

Thinking about it - there are two ways that I can connect:

Connect two batteries in parallel and connect in series to the other two in parallel.

Or, connect two batteries in series and parallel with the other two in series.

Which is best?

 

 

 

 

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I don't think you are asking the difference between 2S2P and 2P2S (which are identical), but you are rather asking if you should common the mid-points of the batteries or not?

Both commoned or un-commoned will work, I'd advise against commoning though.

If you join the midpoints a faulty (or unbalanced) battery will affect the whole bank to its detriment, as opposed to only its own string if un-commoned.

 

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22 minutes ago, phil.g00 said:

I don't think you are asking the difference between 2S2P and 2P2S (which are identical), but you are rather asking if you should common the mid-points of the batteries or not?

Both commoned or un-commoned will work, I'd advise against commoning though.

If you join the midpoints a faulty (or unbalanced) battery will affect the whole bank to its detriment, as opposed to only its own string if un-commoned.

 

Yes, now that I think about it, the mid-point description is what I'm referring to.

I have a balancer that I may want to connect, in which case I must wire-up using the mid-point option.

 

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