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So if I'm making a 13s2p 48v 16Ah battery out of these cells that are rated at 200A each, (3.7v 8Ah), and if I want to power a ~30Amp motor, do I need a 200Amp BMS or a 40amp (40 not 30 because 40 is bigger than the motor discharge current to be safe)

marsnebulasoup
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    Motors can take several times their rated current when starting. Also, you don't want to stress the battery unnecessarily. I'd probably look for a 100-150A BMS. –  Mar 08 '20 at 17:19
  • I struggled with this, also. To overcome the inertial of getting rotor started, starting current can be 5 to 8 times rated current (30A), so your 40A BMS will shutdown during starting. – StainlessSteelRat Mar 09 '20 at 02:38

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