2 parallel 48V 271AH LIFEP04 with separate BMS

[Kevox]

I am building a vehicle based system with 2800 watts of solar (2 strings) to a MPP LVX6048 All in One with all loads being 120V for now. I have 32 CATL 271AH batteries that I plan to build 2 battery banks in parallel with their own Overkill BMS systems (see drawing). I wonder if this battery configuration makes the most sense?

 

[time2roll]

Looks fine. Not much to it. I would skip the battery disconnects. Can remove the fuse or lift a cable if service is needed. Battery can be isolated with the BMS also. That switch may not be used for several years and just provides more connections and resistance. Your call.

 

[DJSmiley]

Agree. DC disconnects are nice, but decent ones rated over 100A are $$$

And to be honest: If you need to service them every week something is definitely wrong...

Any unnecessary breaker, lug, or whatever can potentially cause issues and will add resistance.