Question

What is the rate of solar energy kw reaching the earth's surface?

Answer 1

Your answer cannot be given in kw(power), but it in power per unit area.

At the upper reaches of our atmosphere, the energy density of solar radiation is approximately 1.368 kW/m² (kilo-watts per square meter). At the Earth's surface, the energy density is reduced to approximately 1kW/m² for a surface perpendicular to the Sun's rays at sea level on a clear day.

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