It is possible to have the traction motor become a generator under braking or spin the generator in the genset during braking. This allows us to recover energy and reduce wasted heat generated by mechanical brakes. However, the power generated during braking is much higher than the batteries can absorb in the time available. Therefore, we are investigating several technologies to store recovered energy that can react fast enough and meet our SCWARE factors. Such ideas include ultra capacitors and compressed air.