Various forms of PV concentration have been around for decades. The basic concept: use a large, cheap lens to focus light onto a small, expensive solar cell thereby reducing the amount of solar cells for a given system size. The primary issues you have to deal with are 1) how accurate your tracking mechanism is (you have to point your lenses directly at the sun all day for this to work); 2) how tolerant your system is to inaccuracy; 3) how you deal with heat, and 4) how your various system components hold up in extreme desert temperatures and high winds.
I'm in the industry, and I never believe the projections of people who are still in prototyping. Most times it's not their fault; they just have never actually built a high-volume product.
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Various forms of PV concentration have been around for decades. The basic concept: use a large, cheap lens to focus light onto a small, expensive solar cell thereby reducing the amount of solar cells for a given system size. The primary issues you have to deal with are 1) how accurate your tracking mechanism is (you have to point your lenses directly at the sun all day for this to work); 2) how tolerant your system is to inaccuracy; 3) how you deal with heat, and 4) how your various system components hold up in extreme desert temperatures and high winds.
I'm in the industry, and I never believe the projections of people who are still in prototyping. Most times it's not their fault; they just have never actually built a high-volume product.