Long distance e-bicycle battery power
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Long distance e-bicycle battery power
What is the best battery and watts for long distance e-bicycling? I saw Juiced Bikes offered a 1000-watt e-bike but when I asked their technical rep. He said it would get me more torque and speed but only an estimated 60-70 miles on the lowest setting on a level road. My Trek CrossRip 500-watt Bosch battery gets me about the same distance. I’m more interested in distance than speed.
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I doubt any brand will give you more than 60-70 miles, but again, wrong forum. Ask a mod to move it for you. A Honda Super Cub will get you about 100 mpg
Last edited by shelbyfv; 01-14-20 at 06:21 PM.
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#6
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What is the best battery and watts for long distance e-bicycling? I saw Juiced Bikes offered a 1000-watt e-bike but when I asked their technical rep. He said it would get me more torque and speed but only an estimated 60-70 miles on the lowest setting on a level road. My Trek CrossRip 500-watt Bosch battery gets me about the same distance. I’m more interested in distance than speed.
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I've occasionally joked with my friends about having a dynamo hub charge a motor... but there's the issue with physics and all that. But still... if the motor's only working uphills, partially working on flats and not working downhills, there's surely *some* benefit, no? Only question then is how much, and whether that's significant or not.
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I've occasionally joked with my friends about having a dynamo hub charge a motor... but there's the issue with physics and all that. But still... if the motor's only working uphills, partially working on flats and not working downhills, there's surely *some* benefit, no? Only question then is how much, and whether that's significant or not.
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I've occasionally joked with my friends about having a dynamo hub charge a motor... but there's the issue with physics and all that. But still... if the motor's only working uphills, partially working on flats and not working downhills, there's surely *some* benefit, no? Only question then is how much, and whether that's significant or not.
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I would love to see power data from a whole bunch of ebikes. Is the motor really only working going up hills? How much power do the riders contribute, when they don't have to? I'm sure there are different types of ebike riders, and the data will be all over the place. But I'd be curious to see.
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I've occasionally joked with my friends about having a dynamo hub charge a motor... but there's the issue with physics and all that. But still... if the motor's only working uphills, partially working on flats and not working downhills, there's surely *some* benefit, no? Only question then is how much, and whether that's significant or not.
Much simpler to just carry an extra battery.
I guess you could put a charging hub on the front wheel and switch it on when descending. I don't know how big it would have to be to be effective.
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A few points:
Batteries are rated in Amp hrs (Ah), meaning the number of Amps the battery will deliver over a given time period before discharging completely. However, rechargeable batteries are generally destroyed by doing this, so the number cannot be used to predict mileage without knowing a lot more about the system. Battery-driven systems generally shut down (and batteries are damaged) below a critical battery voltage, not after a set number of Amps are drawn, and the relationship between Amps pumped out and battery voltage is complex (at least to a lay person like me) and nonlinear. In general, however, a 100 Ah battery will run your gizmo about twice as long as a 50 Ah battery, between charges.
Watts of electrical output for the battery is just the Amp draw of the motor (at a given output) times the voltage of the system, which is essentially constant. However, that number is meaningless in terms of bike power or range without knowing the efficiency of the motor over its speed range.
Batteries are rated in Amp hrs (Ah), meaning the number of Amps the battery will deliver over a given time period before discharging completely. However, rechargeable batteries are generally destroyed by doing this, so the number cannot be used to predict mileage without knowing a lot more about the system. Battery-driven systems generally shut down (and batteries are damaged) below a critical battery voltage, not after a set number of Amps are drawn, and the relationship between Amps pumped out and battery voltage is complex (at least to a lay person like me) and nonlinear. In general, however, a 100 Ah battery will run your gizmo about twice as long as a 50 Ah battery, between charges.
Watts of electrical output for the battery is just the Amp draw of the motor (at a given output) times the voltage of the system, which is essentially constant. However, that number is meaningless in terms of bike power or range without knowing the efficiency of the motor over its speed range.
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I would love to see power data from a whole bunch of ebikes. Is the motor really only working going up hills? How much power do the riders contribute, when they don't have to? I'm sure there are different types of ebike riders, and the data will be all over the place. But I'd be curious to see.
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I've occasionally joked with my friends about having a dynamo hub charge a motor... but there's the issue with physics and all that. But still... if the motor's only working uphills, partially working on flats and not working downhills, there's surely *some* benefit, no? Only question then is how much, and whether that's significant or not.
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The energy used to spin the dynamo hub will be greater than what the hub puts back into the battery. Where that energy comes from (motor, rider, gravity) will change based on going uphill or downhill, headwind or tailwind, etc, but the bottom line is that you can't convert one form of energy into another without losing some.
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What is the best battery and watts for long distance e-bicycling? I saw Juiced Bikes offered a 1000-watt e-bike but when I asked their technical rep. He said it would get me more torque and speed but only an estimated 60-70 miles on the lowest setting on a level road. My Trek CrossRip 500-watt Bosch battery gets me about the same distance. I’m more interested in distance than speed.