Solar power keywords (i.e., Solar power keywords): blackbody radiation, Earth's energy budget, ground, intensity, irradiance, light rays, perovskite solar cell, photovoltaic power station, photovoltaics, radiant flux (AKA flux), solar cell, solar cell efficiency, solar constant = 1367.6 W/m**2 (see NASA: Earth fact sheet), solar energy, solar irradiance, solar power, Sun, sunlight, zenith, etc.
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