combine two identical fuses in parallel
If you need a 100A fuse then use a 100A fuse.
Do not try to use two 50A fuses in parallel.
So, a fair comment says I should explain this, well it has been explained on here several times so have a look at these Q&amp;A where there are several good reasons given:
Is it possible to combine two fuses together (with different current rating) to make a bigger fuse?
Using thermal fuses in parallel?