Crazy Cat's Charger Challenge

Power factor correction (gets the most juice from a given outlet rating)
Auto switches to 120 or 240 Volt input (universal input)
Has selections for input current limit of 15,20,40,50 Amp circuits plus another variable 0-50 setting for a standard circuit that might be shared for example with a coke machine, refridgerator, etc... Different input current presets should be selected automatically based on the incoming line voltage to automatically take advantage of higher current 240+ volt systems without any intervention from the user beyond initial setup / programming. Ie. switching from a 120V opportunity charge to a 240V supply shouldn't require any adjustments by the user to obtain the maximum allowable power level. (Automatic Input Power Level - AIPL - my term)
Has some mechanism for balancing the charge of each battery in the pack.
Fully automatic charge cycle
Temperature compensation appropriate to the battery chemistry. This needs to be integrated with charge balancing since each battery will have slightly different temperatures.
Timer capability for off peak charger and electric company time-of-use EV charging rate compatibility
Minimum power level of 2KW, ( 120V, 0.80 * 20 Amps = maximum power available from 120V 20A circuit by code.
Weight < 10 kg. ( 20 pounds )
Volume < 16000 cm**3 ( 1000 in**3 )
Cost the larger of < $1000 US. or < $0.50 / watt ( Anything available today under $500 is not a bargain. They are not power factor corrected, and usually not automatic. )

Another excellent description of what a charger should be: Phoenix EAA Charger Report