I just bought two Currie E-Zip 900 scooters from Sam's Club.http://www.samsclub.com/shopping/navigate.do?dest=5&item=390911 They were only $170.00 each brand new in the box! The motor says it is 900W. It has 24v 12ah battery pack and a 24v 30A Motor Controller. This scooter has a chain drive, but I don't think it freewheels.(lots of motor whine when coasting downhill with the throttle off).
The scooter seems to have decent power on the flats and slight grades, but seems to lose speed rapidly on some of the steeper grades around town. The battery life seems to be really short too. I doubt I am getting more than a couple of miles before the scooter is barely crawling up the hills. I live in the Sierra mountains and there are few flat areas so I need to improve the hill climbing ability and range of this scooter. I plan to use it for my daily commute to work which is a daily total of ~6 miles.
The motor does not even get warm after dragging my 200Lbs up hill until the batteries are drained so I am thinking about overvolting. Here are my questions:
1.36v should be relatively harmless, do you think 48v would be overkill and burn out the motor? (this is assuming that I use an appropriate controller)
2.I saw the formula W=V*A and when I plugged in my 900W motor with the 24V battery pack I came up with 37.5A. My controller says 30A. Does this mean my controller is limiting my motor and that just replacing the controller could improve performance?
2a.What effect does using battery packs and/or controllers with higher or lower Amperage ratings have?
3.I don't want to spend more than a few hundred dollars to upgrade this scooter. What do you think is the most cost effective way to improve hill climbing and range?
4.Any recommendations or advice from more experienced and knowledgable people is welcome.
Thanks in Advance