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Solar modules now selling for less than €0.06/W in Europe
(www.pv-magazine.com)
This is a most excellent place for technology news and articles.
The land thing isn't anywhere near enough of a concern for me, especially when dual uses of land are quite feasible.
24/7 is just about over commissioning and having storage. Build 10x as much and store what you generate. At those sorts of levels even an overcast day generates.