What kind of mileage are you getting vs what the marketing said?
- Thread starter Roseville
- Start date
harryS
Well-Known Member
Here's how you get around some of the advertising hype. First figure out the watt-hr capability of the battery you are using. Then estimate how many watt-hr/mile you will use. Divide the first number by the second, and knock off 10%. Sorry, electric vehicles are based on math.
Example:
1) You get the watt hours by multiplying the amp-hour spec of a battery by its voltage. So a 48V 10.5 AH battery is 502 watt-hours.
2)You take a typical number for watt-hr/mile. 20 watt-hr/mile is common, although my 250W hub motor bike only uses 8 watt-hr/mile at 12-14 mph with me pedaling a lot. However, my mid drive bike does use 20.5 watt-hr/mile at 20 mph.
3) You knock off 10% because the amp-hour rating on a battery figures you run the cells all the way down to minimum. In practice, battery makers shut them off with at least 10% margin. Also knock off another 10% if the battery is a year old.
I actually have that 48V 10.5 AH battery. Figure 400 watt-hr. Yeah, I might get 40 miles out of my little motor. I have done 28 miles and still looked like it was half used up. But I'm only going 12-14 mph.
Example:
1) You get the watt hours by multiplying the amp-hour spec of a battery by its voltage. So a 48V 10.5 AH battery is 502 watt-hours.
2)You take a typical number for watt-hr/mile. 20 watt-hr/mile is common, although my 250W hub motor bike only uses 8 watt-hr/mile at 12-14 mph with me pedaling a lot. However, my mid drive bike does use 20.5 watt-hr/mile at 20 mph.
3) You knock off 10% because the amp-hour rating on a battery figures you run the cells all the way down to minimum. In practice, battery makers shut them off with at least 10% margin. Also knock off another 10% if the battery is a year old.
I actually have that 48V 10.5 AH battery. Figure 400 watt-hr. Yeah, I might get 40 miles out of my little motor. I have done 28 miles and still looked like it was half used up. But I'm only going 12-14 mph.
mrgold35
Well-Known Member
- Region
- USA
- City
- ABQ, New Mexico
I get a little under the advertised range on my RadRover 4" fat tire bike of +20 miles at 20 mph for a max 180 lbs rider (60 lbs bike, 48 volts/15 amps/22 amps peak, 11.6 Ah, 750 watt rear hub motor).
I use it mostly to commute to work around 13 miles round trip, 4900-5400 ft elevation range, I'm about 270 lbs, and the bike+gear around 75-80 lbs. I have it on the highest PAS (level 5, 20 mph max) and use most of my wattage in the afternoon since it is 70% uphill. I try to pedal as much/hard/fast as I can to keep the power around 150-300 watts. The combo of the extra weight and steady 4 mile incline zap about 10-15% of my range at the highest PAS level. I might only be at a 1-5% loss if I drop the PAS to 2-3; but, I don't want to spend more time in traffic at a slower pace just to save 1-2 cents of power.
I did take the RadRover on a endurance run last weekend (PAS level 3, 12-14 mph, power levels 50-150 watts of assisted power, flat terrain). I was able to go 36 miles in 3 hours before my legs just got too tired. I still had one solid bar left (blinking bar means almost depleted). I think I could have broken the 40-45 mile mark on level ground (last 4 miles was the 500 ft elevation climb uphill to my house).
I use it mostly to commute to work around 13 miles round trip, 4900-5400 ft elevation range, I'm about 270 lbs, and the bike+gear around 75-80 lbs. I have it on the highest PAS (level 5, 20 mph max) and use most of my wattage in the afternoon since it is 70% uphill. I try to pedal as much/hard/fast as I can to keep the power around 150-300 watts. The combo of the extra weight and steady 4 mile incline zap about 10-15% of my range at the highest PAS level. I might only be at a 1-5% loss if I drop the PAS to 2-3; but, I don't want to spend more time in traffic at a slower pace just to save 1-2 cents of power.
I did take the RadRover on a endurance run last weekend (PAS level 3, 12-14 mph, power levels 50-150 watts of assisted power, flat terrain). I was able to go 36 miles in 3 hours before my legs just got too tired. I still had one solid bar left (blinking bar means almost depleted). I think I could have broken the 40-45 mile mark on level ground (last 4 miles was the 500 ft elevation climb uphill to my house).
Douglas Ruby
Well-Known Member
- Region
- USA
- City
- Groton
I am getting up to 90 miles on my base Specialized Turbo (200W motor) with 691 Wh Turbo SC battery. At full assist (TURBO mode) I can average 20-22 mph and go 40 miles. At 40% assist (ECO40 mode) I can go over 80 miles at 15-17 mph. On the original 468 Wh battery, I got 25 - 50 mile range under similar conditions. I am 65 yrs old, weigh 235 lbs so I am definitely making use of the assist. My pedaling tends to contribute about 100-120 watts to whatever the motor puts out.
EddieJ
Well-Known Member
Using the Bosch CX motor with a 500wh battery, the minimum has been 9 miles of a 10.4 mile ride, with an elevation gain of 6,428ft The ride was ridden using tour for most of it.
The max has been about 35 miles using tour with about 3,500ft of elevation gain.
This range is consistant between both bikes and both batteries, I weigh 75kg, am pretty fit, and 95% of my riding time is spent off road.
*Battery swapped to complete the last 1.4 miles.
The max has been about 35 miles using tour with about 3,500ft of elevation gain.
This range is consistant between both bikes and both batteries, I weigh 75kg, am pretty fit, and 95% of my riding time is spent off road.
*Battery swapped to complete the last 1.4 miles.
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