Im sure with some minor modifications to the electric motors and a better alternator, you would have much better charge times. I think that someone with some good slectronics skill could improve upon the limitations of this type of setup. Granted it isnt cheap, its just and idea that has flopped alot that someone has finaaly REALLY devolped into a functional device. I think that instead of running a 15 second shot off of the battery packs they should use the alternator to charge the battery pack that would in turn charge some type of capacitor(just a thought though ihave limited knowledge) The wait could prove to be a problem though.