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I am not terribly well informed about current PV Cells, but surely any improvement in efficiency is welcome. The distribution of energy over thousands of square kilometers must be very inefficient with significant losses - the more that solar can compete with conventional power generation, the better ... even community arrays reducing the distance would be better than the current situation. It's that establishment cost which is prohibitive, but when you spread it over the life of the product, and take into account the other advantages, it has to be worth pursuing.
Posted by tardisman