Anyone seen a 24 VDC operated blower fitted. Basically the supercharger is spun by a battery set. Idea is the parasitic drive losses are not present when the charger is operating, then you recharge the batteries once the charger is not required, ie off throttle on a track.

Lots of downsides, not least the added weight of the batteries, but if the batteries were reduced to a couple pounds it might give a nice kick.