Originally Posted by dilkes

If you look at the specs for the battery you bought it says:
[TABLE="width: 100%"]
[TR]
[TD="class: attrLabels"]Maximum continuous discharge current:[/TD]
[TD="width: 50.0%"]20A[/TD]
[/TR]
[/TABLE]
...so if that is correct, a 20 amp fuse should be fine.

If these blow as well and you need more than 20 amps and have to go to a larger fuse, you would be exceeding the battery specs and possibly could cause an issue with either the cells or the BMS. However, if that turns out to be the case, you don't have much choice other than to get a different battery or get a lower power motor/controller.

Having said all this, I don't guarantee anything! but that is the course of action I would be taking if it were my problem.

It's great to have a powerful motor as long as you have the juice to drive it.