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Frequently Asked Question
(1) How to calculate charging voltage for battery?

Normally single cell charging voltage for li-ion is 4.2V, and single cell charging voltage for LiFePO4 is 3.65V; Single cell(12V) charging voltage for lead acid battery is 14.7V, therefore charging voltages for batteries are as follows:

24V LiFePO4 battery (8 cells in series): 8x3.65V=29.2V;

24V Li-ion battery (7 cells in series): 7x4.2V=29.4V;

24V Lead acid battery (2 cells in series): 2x14.7V=29.4V

36V LiFePO4 battery (12 cells in series): 12x3.65v=43.8V

36V Li-ion battery (10 cells in series): 10x4.2v=42V

36V Lead acid(3 cells in series): 3x14.7v=44.1V

48V LiFePO4 battery (16 cells in series): 16x3.65v=58.4V

48V Li-ion battery (13 cells in series): 13x4.2v=54.6V

48V Lead acid battery (4 cells in series): 4x14.7v=58.8V

60V Lead acid battery  (5 cells in series): 5x14.7v=73.5V

If your battery is different voltage, please inform us. Or if your battery is with different cells number in series, you can calculate the charging voltage yourself.

 (2) Can you calculate spoke size for me for a 20' 26'28' rim
 

Spoke Length Calculation 

---click here to download

you can dowload the software  from Download

Bicycle Rim Spoke Length Calculator Software Tool

or you tell the ERD of your Rim,  I will calculate spoke size for you

If you buy motor and Rim and spokes from our company, we will send the spokes which fit motor and our Rim

  (3) How to Determine Your Bike Rim Sizes
 

http://www.sheldonbrown.com/rim-sizing.html

  (4) How to caculate the speed of the Rim size
(rpm)×3.14×(inch)Rim Size ×0.0254×60/1000

25km/h for 20" Rim ==rpm is 261

25km/h for 22" Rim ==rpm is 237

25km/h for 24" Rim ==rpm is 218

25km/h for 26" Rim ==rpm is 201

25km/h for 28" Rim ==rpm is 187

25km/h for 700C Rim ==rpm is 187

 

The code 16 motor is rated at 192 RPM. The code 15 is 205. The code 14 is 215. The code13 is 230. The code 12 is 250. The code 11 is 280. The code 10 is 300. The code 9 is 335. And the code 8 is 378. That's right,  mind you all of these specifications are directly from the engineers of Bafang.

(5) how much should be shipping to our country per kilo ?
you can try to place the order, our website diymoped.com can calculate shipping cost automatically before you check out.

  (6) Could you provide Wiring Diagram of controller/ LED meter/ BMS/ Throuttle
 

Question:Could you provide Wiring Diagram of controller/ LED meter/ BMS/ Throuttle

An: you can dowload all of the Wiring Diagram from website Download

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