Sunlight is gathered by lenses (or morrors) and concentrated onto a solar cell at intensities many times the normal strength. Ever burned a hole in a piece of paper or a leaf with a magnifying glass? That is concentrated sunlight.
The EI Sunflower CPV system focuses 800 times the normal strength of sunlight onto the most efficient space-type solar cells made to generate the same amout of current as much larger silicon solar arrays. Takes up less space.
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