Conductor sizing for 48v 100ah batteries in parallel

[manfromidaho]

Thanks for all of the suggestions. I have decided to add the Class T fuses on the positive from each battery, between the battery terminal and the busbar. Ampacity of the 2 AWG wire is 95 amps, so I'm planning to use 125A class T fuses. After further review seems prudent and the peace of mind is worth it. Question is, this effectively adds resistance on the positive side of the circuit without a commensurate change on the negative side. Should I therefore extend the negative side cable length to at least account for the additional short cable that I will need to connect the fuse to the busbar?

Thanks again!

 

[Daddy Tanuki]

Thanks for all of the suggestions. I have decided to add the Class T fuses on the positive from each battery, between the battery terminal and the busbar. Ampacity of the 2 AWG wire is 95 amps, so I'm planning to use 125A class T fuses. After further review seems prudent and the peace of mind is worth it. Question is, this effectively adds resistance on the positive side of the circuit without a commensurate change on the negative side. Should I therefore extend the negative side cable length to at least account for the additional short cable that I will need to connect the fuse to the busbar?

Thanks again!

do not worry about the resistance differeance between the positive and the negative (within reason) it is not an issue in regards to your system. as long as all positives and all negatives match thats what is important, os P1, P2 and P? are the same and then N1, N2 and N? are the same from the respective battery banks to the bus bars

 

[manfromidaho]

Blue Sea components I'm looking at:

125 amp fuse: https://a.co/d/bvWhkl6
fuse block 110A - 200A: https://a.co/d/h5I2Jeg

Is there a better place than Amazon to order these from? There is like a week turnaround for the fuse. And I see what you mean about "biting the bullet". These puppies are pricey.