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Posted by Mensanator on April 17, 2009, 5:16 pm

Which would only operate when the sun is shining. Better to operate
an electrolysis plant and make hydrogen gas, which could be stored
for use when it's dark out.

But the machinery to keep them focused as the sun moves ain't cheap.

Posted by Alistair Gunn on April 17, 2009, 6:08 pm
In alt.energy.renewable Mensanator twisted the electrons to say:

Or heat up molten salt, or charge up a vanadium flow battery ...

If you want to get the best out of your PV, you'd want them on trackers
These opinions might not even be mine ...
Let alone connected with my employer ...

Posted by Eeyore on April 17, 2009, 6:56 pm

Mensanator wrote:

Have you noticed PV has the same problem ?

Electrolysis to hydrogen and back to electricity is INSANE with losses
exceeding 60% ( and that's a kind figure )..


Posted by Mensanator on April 17, 2009, 8:41 pm

Yeah, but 60% of nothing is still nothing.

Posted by Fran on April 21, 2009, 1:23 am

Not to mention the technical difficulties of storing something as
slippery as H2. It embrittles metal for a start.

Van Chocstraw's heliostatic solar thermal proposal is the best here.
I'd favour pumped storage as the most cost-effective solution in most
settings, all things considered.


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