So what's your E-Assist range?
Bump again. I tried to get some numbers in an other thread but nobody posted any so maybe this way would work to find some E-Assist milage numbers on one charge...
Edit; here is my set up, http://www.bikeforums.net/showthread...e-your-numbers
The one & only time I rode my bike till the battery died I hit a couple of local Bars by the water few miles away, it was nice sunny day lots of live music it was fun, I was lazier then most jaunts with the pedaling plus it was windy & she died about 2 blocks from my home 40.5 miles total miles for the day. I think I could do better but this gives me an idea of range for me. Edit: forgot to add Bikes R.Martin MiPower 36v, 14Ah battery, I weigh 195 lbs.
My range on my recumbent trike is off range on the survey. My range with two Ping packs (48V 15Ahr), running in parallel, with moderate assist is about 90 miles. Thats 16 watt hours per mile on average, with moderate pedalling, in moderately hilly terrain mixed with flatter areas (maybe 50/50). I should mention the camping gear as well.
48v20ah cheap Chinese lifepo4. Bike weight about 80 lbs (just guessing) rider weight 135lbs. Don't know exact range but it's a lot. I don't use e assist for 90% of my power but I think I'd go a little over 40 miles if I did. When I want to go fast I use about 75% electric power and 25% pedal power. Terrain is moderately hilly. Motor is a low cost brushless hub motor
Here is a chart from Excel for my Ohm Urban (2012), 355Kwh per charge.
The Ohm has about 840 miles on it now. The chart is for the last couple of weeks of riding.
I live in Seattle on top of one hill (Queen Anne) and commute to another hilltop (Capitol Hill) with a roundtrip of around 8.5 miles.
Topographically about 300 feet to sea level to 275 feet to work. So the e-assist is used.
Notice that the lower the average speed the lower the electricity usage.
Basically, a charge lasts between 20 miles (lots of e-assist) and 30 miles (much less e-assist). On level ground riding the numbers would obviously be higher.
Today I decided to take a LONG ride and use the Bionx power assist as little as possible. With the wind at my back for the first half, and "drafting" behind a rider returning, the Ohm got incredible mileage. The 28.1 mile ride was a good workout for this 60+ year old rider. I will sleep well tonight. The Ohm Urban used less than half the battery charge for the 28 miles! It took .13KwH to charge it back up. A full charge holds .355 KhW. I had the power assist on 1 out of 4 for most of the ride, with level ground riding done often with no power assist. I never used a full 4 assist, but did use 3 on the last mile up the hill towards the house.
So, at today's rate of electrical usage, I could have gone for a 77 mile ride. Truth be told, I would have needed to use more power assist to make that happen, and then the 77 miles would be less. In a few days, I will take my Marin bicycle out for a non-assisted ride, going over the same course. I'll report how that ride goes. Besides the electricity, the ride also used two energy bars and 20 ounces of water. :)
BTW, the Ohm Urban is a very well thought-out e-bike. It was worth every penny of the price (around $3k). The battery management is first-rate and the components are very good.
Keeping the Bionx Ohm Urban G1 at minimal boost and using brake regen is worth about 40 miles per charge. I average around 12mph and get good cardio. If I rode in flatter cities than Seattle, I'm sure the range would be 50 miles per charge for me. That's about enough for one day for my style of riding.
I have a Trek Verve 4 with a BionX assist. I regularly ride 30 miles with assist level 1 about half the ride. Generally when the wind is in my face. Most of the ride is very flat. I weigh about 250 lbs. I have about 1,000 miles on the system. I've noticed a reduction in the distance I can go. When it was new I got 50-60 miles without a problem. Now, 30 to 40 miles seems to be the limit. Overall, I'm absolutely delighted with the system. I am 70 years old and wouldn't be riding anywhere near what I do without it. I'm about to put the BionX on a Trek Domane 5.9 and kick everything up a notch.
Bump for some more #s ... :D
Range varies greatly with speed!
I cruised 60 miles @~16mph.
Multiple lines reflect a variance in voltage among banks of cells.
Same batteries, reshuffled into 29.6V 31.2Ah, provides barely 40 miles @ 20mph.
Near 25mph ... less than 30 miles.
All ranges were motor only tests.
See - Speed vs Range
See - Homemade Battery Packs
Bike/Purchase Date: Easy Motion Max 700 + PCS/May 16th 2013
Motor/Drive: 250 W Panasonic /Mid Drive
Battery: 36 V 12 AH/5 charge status lights, 5 lights on = full charge
Controller charge status lights: E, 1/2, F
Assist levels: Low, Mid, Hi
Claimed range: 90 Miles
Rear Hub/Accessories: Shimano Allfine 11, Shimano front dynamo, Trelock fr/rr lights, Racktime rear rack, Ortlieb Bike Packer + panniers, fr/rr SKS Longboard fenders, Rubena 700c X 35 tires
Bike weight unloaded: 52 lbs
Bike weight loaded : 60-65 lbs (panniers, tool kit, clothing, locks, water, etc)
Rider weight: 130 lbs (bare)
Gross weight: Approx 200 lbs
Ambient Temp: 28-90 deg F
I commute regularly 25 miles round trip to work with 50/50 hills and flat ground. As a general rule I prefer pedaling as much as possible for the exercise. For this regular commute I use level 2 assist mostly on hills. There is 1 hill I use level 3 on the trip in and I will use level 1 on a 1.5 stretch of somewhat level ground.
Coming home I use level 1 on a short hill and level 2 on another hill and level 3 on a short hill close to home. When the battery was new I would get home and still be showing "F" on the controller and 4 lights would still be on at the battery. Now after 6 months/3200 miles I still have 4 lights on at the battery but it is showing 1/2 at the controller.
There have been a few times on this commute I was in more of a hurry going in and coming home that I would kick it up a notch and use the assist more. Mostly I would use level 1, with a few times of level 2, and a few bursts of level 3. My controller would show 1/2 and the battery would have 3 lights on.
I did 1 century ride that was somewhat flat with rolling hills in 8 hours including 50 minutes of stops. I wanted to save my battery as much as possible for when I thought I would really need it. I ended up only using the assist "off and on" the last 15 miles of the ride. I did use a combination of levels 1, 2, & 3 during that time. When I finished the ride the controller was showing 1/2 and there were 4 lights on at the battery.
Overall I have been very happy with the performance that this E-Bike has been able to deliver, although a little pricey and a little heavy, it has been worth every penny, and I would recommend a Panasonic mid drive setup!
Yes, I agree DrkAngel, speed IS a KILLER. What I am trying to gauge here is how far the average person goes/can go, on an E-Assist bike on one charge, with what they think they are putting into the ride, 10%, 50%, 90% pedal power + E-Assist on their usual rides... Just to give people a sense of how much, and what they could expect from an E-Assist bike set up... The least/average/most, that people are getting also compared to what they are putting into the ride personally...
Li-ion vs SLA
Another important factor is the battery type.
I decided to do an "in-depth" comparison of my Li-ion replacement vs the eZip oem SLA pack.
..... 25.9V 31.2Ah (9lb 12oz) = 808Wh ..... vs ..... 24V 10Ah** (15lb 2oz) = 240Wh (120-140Wh usable)
SLA is a major heat producer - 40-50% wasted as heat!
Li-ion and lipo, at modest rates, near 100% efficient. No noticeable heat production!
SLA (10Ah) - expended in 1 hour = 6.14Ah *
24V x 10Ah = 240wh
.614C drain = 147w output to motor for 1 hour but 93wh wasted heat ~60% efficient
1C drain (10A) = 240w output to motor for 1/2 hour but 120wh wasted heat ~50% efficient
25.9V x 31.2Ah = 808wh (Smaller than and weighs about 1/2 the 10Ah SLA pack!)
.2C drain = 160w output to motor for 5 hours but 2-3wh wasted heat per hour ~98% efficient
.333C drain = 260w output to motor for 3 hours but 10-15wh wasted heat per hour ~95% efficient
The recycled Li-ions I use are designed for a .25-.33-.5C discharge rate. 2-4 hour runtime.
Surge output, IMIO, should be limited to 1C. 31.2Ah pack for ~30A controller.
*SLA batteries are typically rated at a 20hr discharge.
A 10Ah discharged in 1hr, typically, outputs a meager 6.14Ah.
**Pictured SLA pack, rebuilt with 11Ah "rated".
Okay, after measuring the KWH for 950 miles, here are some numbers.
Ohm Urban - 355 WH per full charge
Total KWH used: 11.8
Avg Miles / KWH = 80
Avg Miles / Full Charge = 28.3
My commute is 8.4 miles round trip with a downhill at first, level ground, and uphill to the end. Get it? "Uphill both ways."
On weekend pleasure rides on more level ground, a full charge yields over 40 miles, with low to moderate battery usage on the rides.
The Ohm Urban is a very comfortable and well thought out e-bike.
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