I attended a meet up and Evening ride with the Electric Bike Club of San Diego, just the other evening. During a rest stop, required for aching derrieres rather than aching legs, the subject of battery voltage vs motor power came up.
I am an experienced sailor and engineer and first got interested in E- vehicles from Battery power applications on Sailboats. The over-riding problem for all electric battery powered applications, E-bikes in particular, is the compromise between battery capacity and motor power. E bike batteries come in a range of 36-48 volts and 8-15 amp hour capacities. At Electric Bamboo Bike Co we design for the best efficiency of motor drive and performance. With a 350watt 36volt motor and battery capacity of 13.6 amphours, our lightweight bamboo frame and clean design give outstanding performance. Our FREEFALL Cross Trail weighs in at 41 pounds and will travel 50 miles at an average speed of 18MPH, and still show over 50% battery capacity.
|Freefall electronic display|
I am always amused by the stories of e-bikes achieving 70MPH - it is possible of course, with high amp controllers and todays Lithium ion batteries, but only for a few minutes duration before recharging is needed
LIVE FAST - DIE YOUNG [the battery mantra]