It is, of course, a fantasy.  It takes just as much energy to break water
into its constituent parts of hydrogen and oxygen as you get when you
combine them by burning the hydrogen.  In practice, there is some overhead,
so you actually expend more energy to separate them than you get back by
burning them.  You could get the same effect by storing the power in
batteries.

I suppose a case could be made for the idea that the solar panels could
continue making hydrogen (or charging batteries) even when you weren't
driving, but even 100% efficient solar panels still wouldn't give you more
than a few miles a day.

At 02:22 PM 2/24/00 -0800, Dan Nims wrote:
>Fantasy: Imagine driving a hydrogen powered Vanagon.  High efficiency solar
>panels on the roof power a converter to draw the fuel out of water!

Bill (SE Arizona) (Bill@freeholder.com) HTTP://www.freeholder.com
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Censorship is the assassination of ideas.  No matter how well-meaning its
proponents may be, they are more dangerous to us than any outside enemy.