Working (as in safe, efficient, reliable and cost-effective) beaming-technology is one piece of that puzzle, but not the most difficult one to overcome.
solar in space can collect 2-3 times the energy for the same size and quality cells. (no clouds, 24 hour illumination, no atmosphere) minus the unavoidable transmission-losses, you may still come out ahead of earth-based solar.
However, being twice as efficient helps not at all, when you are also a thousand times as expensive. Launch-cost, assembly-cost and m
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