On Aug 6, 2006, at 9:24 AM, Tony Smith wrote:
>
> http://www.pentadyne.com/spec_vssdc_plus.htm, claims 60kW load
> for 45 seconds.  That should power your house for, oh, 20
> minutes or more.  Big & heavy too.  Lasts over 20 years.

Rough calculations say that's equivalent to less than a gallon
of gasoline.  Chemical energy is VERY dense, especially if you
get half (more than half, actually) of your reactants from the air.
Presumably that's why batteries win out over competitors (likewise,
compare even the most spectacular supercaps to batteries...)

BillW

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