What is regen and why is it desirable?
Regen is short for regenerative braking. This basically is a system by which the energy of a decelerating EV is harnessed, either by using the drive motor as a generator, or by driving a separate generator. The electricity created by this process is fed back into the drive battery pack, restoring some of the charge. Regenerative braking seldom has a significant effect on overall range, but it does improve drivability, and reduces brake wear. Most AC drive electric vehicles include this feature, but it is only rarely found on DC drive EVs.
