That wikipedia article seems to be citing somewhat conflicting references. Further down it says "The capacity factor for power towers was estimated to be 72.9%"

That wikipedia article seems to be citing somewhat conflicting references. Further down it says "The capacity factor for power towers was estimated to be 72.9%" [35] (http://www.nrel.gov/solar/parabolic_trough.html http://www.nrel.gov/solar/parabolic_trough.html). A heliostat based design is going to significantly raise the amount of usable insolation. And the mojave desert is probably close to an ideal location for such a plant.