>> US energy department Hydrogen "storage in a solid" 
>> targets
>> were 6.5% by mass.

> Still not good enough for a car.

Maybe not. But Lotus will sell you a Li Ion battery powered 
car with even lower mass energy density and a $100,000 price 
tag, and tell you how wonderful it is.

> but what this is really going to do is
> make solar and wind much more viable.

> If you can cover your roof with solar, and have a washing 
> machine sized
> box in your basement that converts spare power in the day 
> into hydrogen
> and oxygen, then burns it later when it's needed.  Or a 
> much larger
> version for huge solar arrays that can provide power on 
> demand at night.

Or a larger water gasometer at near atmospheric pressure 
that uses off peak mains from whatever source to do water 
electrolysis at near 100% efficiency, and the hydrogen is 
burned next day.


    R


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