goatman said:
the bms is for the battery,not the controller or motor. find out wich 18650 cell is being used and google it to see what its max continuous amp rate is, multiply that by the number of p and that's the maximum amp rating you want for your bms. if that number is 60amps get the 50 amp bms.
find out the amp rating of your controller. you don't want a 30 amp bms protected battery for a 50 amp controller.
you can always look at the fuse that's between the battery and controller to see what kind of amps your bms and battery needs to be
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with a 40A fuse what does that tell you?
40 amp fuse tells me I want a battery that can deliver atleast 40 amps.
I know, mark hasn't said what his 18650 cells are and we don't know how many p the pack is.we asked, all he wanted to know was whether to get a 30 or 50 amp bms.
40 amp fuse, 50 amp bms.