SSPS for Hydrogen Economy

> Here is an excerpt from Nature.Com:
> http://www.nature.com/news/2004/041004/full/041004-13.html>

> Can anyone calculate or guesstimate, or opine on how large of an
> SSPS project would be required to achieve the same thing? Is this
> a more palatable solution than 1,000 nuclear plants?

Well, a nuke plant produces 7.9 billion KWh in one year - enough to
supply electricity for 773,000 households.
http://www.nei.org/

Powersats produce more electricity the bigger they are, and the
standard seems to be 5 GW. But what is that in KWh?