http://ecomodder.com/forum/showthrea...hina-9133.html
We have had NUMEROUS discussions here re: electric/mechanical conversion efficiency relating to hybrids and human powered vehicles. As far as I know there is no pedal-powered generator>controller>electric drive motor combo that is more efficient than a typical derailleur chain drive (typically ranging from 82-98.6% efficient, with I suppose 90+% efficiency most of the time). What does that mean? It means you would be wasting more of your pedalling effort with electric drive vs mechanical. Now if you are into the exercise aspect of it then perhaps it's not an issue. But I, speaking as a lazy man, want the most of my effort going efficiently into propulsion as possible.
Really, I think you may already have your ultimate transportation solution in the C70 just as it is. (They are perfect you know)