Submitted by EVTripPlanner on March 3, 2013
When you're at the top of a hill, put a bunch of rocks in the trunk and frunk. When you reach the bottom, remove them. Let me know how it goes.
Yes, it *should* work, as long as your regen isn't maxed out without the rocks and the downhill isn't mostly down and not too much up-and-down.
(I'm collecting more serious tools for EV drivers at http://EVTripPlanner.com - soon to have a "Trip Energy Estimator" that takes into account real-world speeds and conditions)