Robin van Spaandonk writes: >comparison, we get 84 kWh. Since electrical systems can be much >more efficient, let's say 75%, we would only need 112 kWh stored >in the bettery.
It is 60% from power mains to "vehicle propulsion" with "current technology" circa 1990. See: http://www.lenr-canr.org/acrobat/NRELenergyover.pdf I'll bet it is 70% today; see exhibit A3. Regenerative braking is a big plus. >A simple rule of thumb, taking inefficiencies into account would >be recharging time = driving time. The electric bicycle with lead-acid batteries does not meet this test. However, there are now better batteries and specially made chargers that can speed things up. A bicycle is the most efficient means of transportation on earth (better than any other machine or animal), so you can see this charger is not adequate. - Jed
