Submitted by jjb94941 on September 18, 2013
This question is more a matter of interest than of practical import.
If one has a 100% charge beginning at high elevation (unlikely I concede) and one immediately begins driving down the hill, of course the battery will have no capacity for further charge. Does this mean that the regenerative braking that one can normally expect won't occur. If it does "brake" where does the energy go?!