Fusing batteries in parallel

[JeffG]

Hello all, I am building 4 of the following batteries:

o 280ah Eve cells x 4 in series for 12vdc nominal
o JK BMS 200ah with 2ah active balancer
o 2/0 wiring from battery negative to BMS and from BMS to negative post on battery box
o 2/0 wiring from battery positive post to positive post on battery box
o BMS start switch from BMS to front of battery box

Batteries will all run separately to a Lynx power in or distributor via 2/0 wiring (ensuring same length wire

I am pondering using a 250ah T-class fuse in each battery, as I have room in the case, is my thinking flawed?

TIA, Jeff

 

[Skypower]

Sounds good, just use a quality fuse holder like Blue Sea

 

[CoolWill]

Also, your units are wonky. Ah = amp-hour, a measure of charge. A = amps, a measure of current. Battery capacity is Ah, fuse current is A.

 

[JeffG]

Also, your units are wonky. Ah = amp-hour, a measure of charge. A = amps, a measure of current. Battery capacity is Ah, fuse current is A.

Thanks CoolWill, appreciate the education.

 

[Pappion]

IMHO: That much power should be 24v. Seems to me you want to run a substantial Inverter, >2000W. 24v being half the amps will save you some copper and the wire voltage drop will be a smaller % loss to the inverter.
Victron has 70A DC-DC (24v to 12v) converter that can power an RV 12v backbone.
Also: To prevent nuisance fuse blows, the fuse amps should be 25% to 33% higher than your maximum amps. The fuse is just there for catastrophic protection. The BMS should shutdown for overcurrent conditions, until one day it does not.