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  1. 1

    DIY Battery Packs

    Hi, I'm interested in creating more capacity and volts for my EV's, and was considering buying multiple 24v 7s3p batteries and connecting them parallel and serial to create desired voltage and capacity (AH). However, these 24v battery starting blocks are 7s3p 28AH 45A continuous 60A peak BMS...
  2. 1

    MY1020 BLDC Motor Noise

    I know I'm overvolting a 48v with 60v, but should it really be that noisy? I'm wondering if some of the vibration and noise is from the fact I'm running a #410 drive sprocket with a #415 chain? It's only 1/16" difference, but with a 3mm sprocket vs 4.8mm roller width, I assume that will add...
  3. 1

    BLDC Motor Max Efficiency Threshold

    Hi, Is there a maximum efficiency threshold of a BLDC motor before giving more juice lowers performance? I have a 1200w 48v 30A BLDC motor I am over-volting with 60v 33A. The acceleration is great and the torque is good but at top speed and on the 'high' speed setting, at the top end if I...
  4. 1

    Key lock toggle switch to throttle key

    Hi, I wanted to change my throttle grip that includes a key lock. Only my current key-lock is just a toggle switch... The throttle only seems to have a single blue wire for the key-lock, yet the key-lock from the controller is a 2-wire connector as it's just a circuit breaker. Is it...
  5. 1

    Overvolt 2000w 45A 48v motor to 60v 33A-35A or swap controller for bigger amps

    Hi guys, I'm at a junction in the 'pimp my Chinese eBike' project where I need to upgrade my battery having purchased a 2kw 48v 4300RPM motor to replace my 1200w 48v motor, and I naively replaced the 30A controller with a 48v/60v 33A-35A, not checking that to get proper @ 2kw you need 45A @ 48V...
  6. 1

    3 speed switch not working after controller change

    Hi, I just upgraded a 1200w motor to 2000w and replaced the controller as well. At first the motor ran in the wrong direction, and the controller doesn't have a learn wire. So I hunted the web and found the YouTube video that showed the phase and hall wire changes required to reverse the motor...
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