That's been discussed. The concept is that the EVSE would contain a capacitor that was gradually charged up. When the EV was plugged in - zap. I guess they'd need enough capacity for several vehicles during rush hour.There's another often overlooked issue with faster charging. Even if you had an ultracapacitor that could store 16kwh (or I believe in the Volt's case it really uses about 10 Kwh)... Imagine how much power it would require to be able to charge the thing up in 1 minute. For that one minute a car would be consuming the same amount of power as several office blocks.
My 2013 takes 3:45 at 240v. Typically 9:20 - 10:30 on 120v. Variance seems to be dependent on temperature and voltage drop at the outlet. I rarely need to charge from fully depleted though, so I don't have a great set of historical data points for this.Do the 2013 Volts take 4.5 hours to charge with level two chargers? My 2012 takes only 3.5 hours.