Adding batteries in parallel to existing batteries

DIY
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1

Hi everyone,

I need your advice and expérience please:

To increase the storage capacity on my system, (home storage with 4 12v non victron lithium 200Ah in series)
I wish to add a new loop in parallel, 4 x 12v
The 4 new batteries will be same capacity, same tension, but not same model(not victron either)
How can I connect / balance them? Using an external bms?

Thanks in advance!

2

As these are non Victron batteries with a non Victron BMS you should look at a generic forum such as DIY Solar forum as this is a Victron specific community.