How much energy reaches the earth's surface in one square foot?

The amount of energy varies and depend on factors that include distance from the equator, height above sea level and of cource weather. An average of 1,000watts per meter (peak) is usually quoted for engineering purposes and there are an estimated 6 hours of peak exposure. To get the energy per square foot, take 1000watts and multiply by .093 This results in 93 watts per square foot. The amount of energy varies and depend on factors that include distance from the equator, height above sea level and of cource weather. An average of 1,000watts per meter (peak) is usually quoted for engineering purposes and there are an estimated 6 hours of peak exposure. To get the energy per square foot, take 1000watts and multiply by .093 This results in 93 watts per square foot.