The main problem with solar power is that no power is generated during the
night. That could be offset if other means of generating could shutdown
during the day to be fed by the solar plant..  but that isn't workable 
either
because the US power grid is inadequate to carry the load where it is 
needed.
The grid is topped out right now.. just trying to keep California cool 
during the
summer months.

That's why hydrogen has its appeal.It might be easier to move hydrogen than
to move electricity. Pipelines can be laid easier and faster than high 
tension lines
over the western desert, is my guess.

Whatever. Large solar plants probably won't happen in my lifetime, anyway. 


--Bob
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