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Speed and Range

The motor is in fact a hank of copper so the maximum speed is determined by controller specifications and battery voltage. The energy consumption has a nonlinear dependence on speed, because most energy is used to overcome the air resistance.

"The quieter you go, the further you'll get" is also applied to electric vehicles.

The table below shows experimental data, with a 80 kg rider on bike on a flat surface without wind.

 

 

 Motor power,  
 Watts
 Speed,  
 km/h
 Energy consumption,
 Watts*hour/km  
Range, km
36 V 9.6 Ah (330 Wh) 48 V 9.6 Ah (440 Wh)
48 V 16 Ah (750 Wh) 77 V 15 Ah (1130 Wh)
150 + pedals 20 7 47 62 107 161
250 25 10 33 44 75 113
350 30 12 27 36 62 94
500 35 13 23 31 53 80
750 40 18 18 24 41 62
1000 45 22 15 20 34 51
1500 50 30 - 14 25 37
2000 60 34 - - 22 33
2500 70 42 - - 17 26
4500 80 55 - - - 20



Normal mode
Boost mode (<3 minutes)                  
Flying to get a new battery!



The range is counted for a flat ground and a good summer weather for a typical hard tail ebike without using pedals. Some specific methods, like coasting, less brake applying and pedaling, can help to greatly increase the range.

All our batteries can be combined in parallel (two, three and even more) having the range proportionally increased.