Parrelling up cheaper 12V lifepo4's

[Gros21]

Well i need high current to run some winching batterys (400A+) most of the cheaper 12V batterys have smaller BMS's so im considering running 3-4 x 200ah batterys with 150A BMS's. These will be charged via my cars standard alternator (not smart type) a smaller solar pannel will also be used.
The batterys will be china specials and likely still be cheaper than a single N200/8D caterpillar battery which is around 1500CCA but noware near the storage

 

[sunshine_eggo]

See link #5 in my signature for best practices on paralleling batteries. Starts around page 18.

 

[Gros21]

Yep as the current draw will be unregular im presuming they will level out over the week till they are used again.
Also in a car you generally dont want to parallel batts as they will act as a load on each other however these should be matched and have a lower internal impedance ( I can measure this if needed)

Ill likely use busbar to wire these.
While its Absolutely easier to run 1 or 2 truck battery's this is much about playing with lithium and weight savings.

Im currently running lithium's on my Harleys (norco nlp30 and nlp20) im a fan and they don't seem to suffer the same voltage drop as the old AGM when cranking a high comp motor.

Also if i run 4 x 12v battery's it would be easy to convert it into a 48V system