# Estimated value of solar constant is______________

The estimated value of the solar constant is 1.366 kilowatts per second per square metre. The solar constant is used to quantify the rate at which energy is received upon a unit surface such as a solar panel.

### Explanation

Solar constant, the total radiation energy received from the Sun per unit of time per unit of area on a theoretical surface perpendicular to the Sun’s rays and at Earth’s mean distance from the Sun. It is a measurement of the solar electromagnetic radiation available in a meter squared at Earth’s distance from the sun.