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Old 01-22-10, 05:53 AM   #1
morph999 
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Advice from someone who has had an e-bike for a year

Let me just throw out some advice to new people who haven't bought one yet.

You will likely need at least a 36v15 AH SLA pack or 36v10AH lifepo4 pack before you are satisfied with the range. You need almost twice as much AH in an SLA (lead -acid) battery as you do in lifepo4 because of the peurkert effect. If you have to get SLA, I recommend getting the EB-20-12 which is the B&B 12v20ah SLA's. They've been specially made for electric bikes and have been known to last to 5000 miles if taken care of correctly. I started out on 60v9ah SLA pack and it sucked really bad. I could barely get 6 miles out of it and that's with 50 % pedaling so more like 3 miles without pedaling. I would also say capacity over volts. I got a 36v20ah lifepo4 now. I chose capacity over more volts because I found that with the 60v pack, I rarely went over 25 mph anyway. I'd much rather enjoy a 1 hour ride on a 20AH lifepo4 pack than a 5 minute ride on a 60v9ah SLA pack. Nothing worse than seeing a gas scooter blow by you on the road because you ran out of battery. I plan on adding another 12v20ah Thundersky later this year, though.
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Old 01-22-10, 09:08 AM   #2
xtrajack
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I have had mine (E-Zee 400 watt hub motor, 10AH LIFPO4 battery on an Xtracycle) since March '09. I think I am fairly pleased with it's performance. I have only put about 1000 miles or so on it, do to various issues---some kind of board went in the battery, charger died, and then, some yo-yo managed to poke a hole in one of the cells. That one was good for a lot of downtime, almost 6 months worth.

I didn't put any where near as much thought into it as some folks do. I thought e-assist on a cargo bike couldn't be a bad idea. So I called a shop that I had heard good things about, told them what I had,what I wanted to do with it, then bought what they recommended. The 1000 miles or so that it worked was awesome.

I just got my battery back. Seems to be working fine. I can go round trip(12 miles) to work and home using about 2 AH. I generally pedal most of the time and try to
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Old 01-22-10, 09:55 AM   #3
morph999 
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wow. I just did a ride today. 3.5 AH got me 6 miles on my 5303 hub. I thought that was good. My hub motor is pretty powerful, though. Peak wattage was 1212 watts today. Peak amps was 33 amps. So 39 watts x 33 amps = about 1212 watts. I can't wait until I add another 12v thundersky on it. Should have that by summer.

I also have a forsen hub motor. I wonder what the efficiency is on that. I bet it's a lot better than my 5303.
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