Originally Posted by
bhuang1103
I tested my bike extensively this weekend. Fully charged with BMS balancer, I got 37 miles with no pedaling and avg speed of 12 mph. The controller apparently cutoff and the cells got down to 2.6V.
My system is 20AH cells x 8, and 450W motor/controller from a Currie Tech Ezip bike that was crashed. I retrofitted the electric components onto another bike.
If I get a better or more efficient motor, say from 9 Continent, I wonder if I can push 40/50 mile range.
Are you a flatlander? I always pedal, but I don't think I'd get 37 miles without pedaling, but then I'm near Glacier National Park and it's mountainous here. I haven't gone more than about 24 miles so far but I've still had plenty of power left in the cells (over 26V). (Plans for a longer trip to a lake tomorrow will have to be postponed since we have a hazardous weather warning that's calling for a storm system to move in with high winds, hail and heavy rain.)
I don't think you'd see a 40-50 mile range on one battery pack by changing motors and controllers, even though the Currie controller can demand 35 amps (that's why it's got such great torque for someone like me who lives in the mountains). Add a second pack, and then your range will clearly exceed the 40-50 mile range you want.