Originally Posted by
Leisesturm
So, NO, no one has even experimented with using a dynamo hub to keep an e-bike battery charged because the idea is a complete non-starter.
The dynamo could be intelligently integrated into the braking system somehow ... say every time you squeezed brakes, or were coasting downhill. The "braking" load, experienced with a typical hub dynamo, from powering a phone or lights, could be used to recharge the drive-motor battery. Effectively: DIY regenerative braking ... until the all-in-one units (found in cars and locomotives) are a cost-effective option for eBikes. That's something Tesla should look into ... instead of wasting $$ with hyperloops and launching cars into orbit.