I've bought an E bike with both a front 250w hub motor and a pedal assist motor mounted near the bicycle's pedal arms. The bike came with no battery.
I'm going to mount the front wheel and hub motor on a lighter mountain bicycle frame. I want to try to run it off a 24v 10a Lithium Ion battery.
I would like to use the bike's original ECU, power controler and twist throttle in the conversion. In accomplishing this, I am hoping to bypass the pedal assist and control panel. This would mean disconnecting the pedal assist motor and control panel from the battery terminals and ECU, pulling out the ECU and power controler and wiring the ECU and power controler to a new battery and existing twist throttle.
BTW, if anyone is looking for a bottom-bracket pedal assist set up with no ECU and no battery, please contact me. I'm in Seattle.
This seemed complicated. I am hoping one of you all can help me understand, first, the difference between a power controler and ECU? Sorry for a pretty basic question, I'm a newbie.
Also, can anyone help me understand where I could get a wiring guide for the original Giant bicycle?
Would anyone recommend buying a new ECU and power controler for the twist throttle only?
Unless the bike requires the pedals to be rotating in order to use the twist throttle then you might be able to unplug the pedal assist sensor and the hand throttle will operate normally without it.
On most electric bikes ECU and Speed Controller are different names the same part. It sounds like your bike has two separate electronic boxes though which is unusual. If you are not able to get it running with the pedal assist sensor disconnected then you may need to install a new speed controller.
Unfortunately, we do not have a wiring diagram for the Giant Suede E electric bicycle.
It is our understanding that the Giant Suede E electric bicycle is a 36 Volt bike, in which case its original speed controller will not run the motor on a 24 Volt battery pack due to its low-Voltage cutoff feature. Also if the motor is run on 24 Volts it will be very slow and powerless. So we recommend using a 36 Volt battery pack with that bike.
If you need a new speed controller then we carry a 36 Volt brushless motor speed controller for 250-350 Watt motor which is our item # SPD-36350BLDC.
Please let us know if you have any questions.