Free energy?
Overunity?
http://www.solarwindenergytower.com/
Installed in a hot, dry area with production 24/7. But wait there's more... Cold in desert at night.
It would still be dry at night so it should work 24/7.
What gets me is the energy to pump the water is nearly half of the output.
It is a case of more out than in but the main source is solar.