SURVEY - Research Request

[brucehawsker]

I am trying to compile a set of Wh/mile consumption numbers. Not to play one manufacturer off against another; I am quite willing not to have brands or marques attached to the data.


To produce a distribution, I am asking you to post the following data:

1. Voltage of your battery (V)
2. Ah of your battery (marked Ah or sometimes A)
3. The mileage you would expect from experience (not manufacturer's numbers) your bike to do from one full charge
4. Whether your bike is a crank or hub motor
5. What your weight is in kilos or stone or lbs (optional )

I will analyse the results and report back.

Could be make this a sticky, Mr Scott?

Thank you for your help in advance.

Bruce

[morphix]

I am trying to compile a set of Wh/mile consumption numbers. Not to play one manufacturer off against another; I am quite willing not to have brands or marques attached to the data.


To produce a distribution, I am asking you to post the following data:

1. Voltage of your battery (V)
   
   36V
   
2. Ah of your battery (marked Ah or sometimes A)
   
   5Ah
   
3. The mileage you would expect from experience (not manufacturer's numbers) your bike to do from one full charge
   
   18 miles
   
4. Whether your bike is a crank or hub motor
   
   Hub
   
5. What your weight is in kilos or stone or lbs (optional )

10 stone / 64kg

Bike weight: < 21kg

Bike usage: Range achieved at mostly highest power assist level, with constant light to moderate pedalling.





I will analyse the results and report back.

Could be make this a sticky, Mr Scott?

Thank you for your help in advance.

Bruce

Suggestion: Could also take the weight of the bike, and how people ride, ie: throttle-only, pedal assist only, combination, moderate or high pedalling etc, to give a more detailed breakdown..

[flecc]

Bike example one, two owners results reported.

37 volts

10 Ah

15 miles

Hub motor

70 kilos

(24.7 Wh/mile)

Also known with another owner of the same e-bike:

37 volts

10 Ah

11 miles

Hub motor

Rider weight not known.

(33.6 Wh/mile)

Bike example two.

26 volts

10 Ah

35 miles

Crank drive

70 kilos

(7.4 Wh/mile)
.

[d8veh]

I keep data from every journey. I don't think I pedal that hard, but maybe I do because I seem to use less power that everybody else.
Bike: Sunlova E-8F26M03S front hub motor
Battery 9aH, 36v
w/H per mile: 5.17 (982 miles)
Range: 53 miles (using about 6.5 aH after which the battery goes flat up the final hill to my house)
Bike weight: 27 Kg
Rider weight: 101 kg

[morphix]

I keep data from every journey. I don't think I pedal that hard, but maybe I do because I seem to use less power that everybody else.
Bike: Sunlova E-8F26M03S front hub motor
Battery 9aH, 36v
w/H per mile: 5.17 (982 miles)
Range: 53 miles (using about 6.5 aH after which the battery goes flat up the final hill to my house)
Bike weight: 27 Kg
Rider weight: 101 kg

53 miles from 9Ah that's incredible! I'm curious is that on the lowest pedal assist level or?

[HarryB]

Emotion

26V

10Ah

14 miles (was 22 miles - new and in summer)

Crank

74kg

Cytronex Trek 7.3FX

36V

4.4Ah

11 miles

Hub

74kg

Of course it all depends on the age of the battery. My Panasonic is doing really badly compared to when it was new (and in the summer).

[NRG]

Bafang Peugeot

Using low/medium pedal assist 100% of the time.

44.4v 10Ah

8(low)~14Wh(medium) / Mile or 55 to 32 Miles

80Kg

Hub

Kalkhoff Proconnect S

Using ECO assist 100% of the time.

26v 10Ah

12T motor sproket: 7.4Wh / Mile or 35Miles
11T motor sproket: 6.5Wh / Mile or 40Miles

80Kg

Panasonic crank drive

[d8veh]

53 miles from 9Ah that's incredible! I'm curious is that on the lowest pedal assist level or?

Using the pedal assist only, the power gradually decreases to zero as the speed approaches 14mph, so, if you pedal at over 14mph, you don't use any power. My legs have gradually increased in power, so I can now manage pedalling over 14mph for prolonged periods. I keep a graph of how many amp-hours for my daily 30 mile commute, and since the new year, it has decreased from about 6 to 2 (as long as it's not windy). Now I should be able to do 3 journeys without re-charging making 90 miles. As I've said before, it can be very misleading making claims about range when you're pedalling at the same time, but, hopefully, people will read into some of the detail in this survey to get an idea of what they can expect.