Is this a class T fuse?

[A.Justice]

I see the use of the fuse on lead acid batteries, most of the new solar systems now use LFP batteries where the BMS will limit the current out of the battery, I don't use fuses on my system with 6 LFP batteries, does anybody has a reason to use fuses on LFP batteries?

Short happens, FETS fail in open position, fire.

Short happens, FETS fail open, fuse blows, no fire.

 

[Zil]

The BMS is not an overcurrent protection device. You need a proper fuse. No argument.

 

[LithiumCanuck]

Interrupting current of 100 KA seems more than enough to me! ?