I first saw the basic Volt design in a car in 1979. You can find an article on the car in the online archives of a magazine called "The Mother Earth News". Additionally, you will find articles about the first efforts to convert cars to run on ethanol. I mention that because anyone interested in the Volt will find some very interesting reading there as well as plans to build your own serial hybrid with a battery pack that can be completey replaced for around $250 at todays prices. I was a young GM engineer at the time and I turned in a suggestion to build it then which was turned down. But back to the main reason for this post:
THIS DESIGN HAS BEEN WORKING FOR 29 YEARS WITH LEAD-ACID BATTERIES! No, you can't drive it for 40 miles before cranking the generator (which should be an ultimate goal and would be a great advance for a serial hybrid). But the point is, a serial hybrid would leapfrog the competition w/o that great advance. They are simple and inexpensive to build and thus could be profitable now or even 25 years ago.
BOB, PLEASE BUILD IT NOW AND ADD THE 40 MILE ALL-ELECTRIC FEATURE IN 2011! GO GM!