[john61ct]

Key bit is voltage - if the chemistries are similar so the SoC vs V table is similar…

and only if paralleling to increase capacity, never try to stack serially to get higher voltage.

But yes sub optimal, more care, knowledge and gear needed to keep things working smoothly

 

[john61ct]

For serial connections, each member of the string really should be as identical as possible in V vs SoC, capacity, wear level, ESIR.

The pack is only as good as its weakest link, and cell/groups in poor health will accelerate the aging of the pack as a whole.

Plus you must have one BMS control the whole string, not separate ones per group.

With paralleling only gross failure of one member impacts the whole. And each sub-pack can more easily have its own BMS if you want