LeftieBiker wrote: Geez, where's the fun in that??! Why unplug an hour early when you can hack the car's primary systems, void the battery warranty, and risk who knows what else? Where's your sense of adventure, man?
All too true, but as you say, where is the sense of fun and adventure in such a simple solution.
Have often thought that it might be useful for those of us that desire maximum regen independent of battery state (charge level/temperature/age) to incorporate a supercap into the system. The supercap would absorb the regen and either feed it back out into the drive system or charge the batteries at a steady rate.
As always, there are a variety of trades to be made in such a design (cost/size/weight/complexity/reliability) and it would probably only address a certain subset of the population. My guess is that it's not worth doing overall, but I really hate to see how little regen is available for the first dozen or so miles on my drive every day.