[Gregski]

Gen 1 Chevy Volt charger and DC DC converter, keeping the Chevy GMC, Lexus, BMW, Prius, Honda, Tesla all stock for the purists

DC DC converter serves a similar role to an alternator except it takes high voltage from the big battery pack say 360 volts and reduces it to 14.5 volts or there abouts in order to charge the "12 volt" regular car battery

Why not just use a regular automotive alternator?
This would result in a lot of losses. Lets follow the power chain. We would start at the high voltage battery, feed DC power from it to our Inverter where we would change it to AC power to spin the AC electric motor, then the electric motor would have to spin the alternator using a belt, then the alternator would harness that kinetic (ie motion energy) I think again starting with AC and have to convert it to DC to feed it into our DC car battery.

Remember electricity lives in batteries in the form of DC (Direct Current not AC Alternating Current) it lives in the walls of your house as AC) yes Robert this will be on the quiz