Amount of solar energy received on the earth’s surface per unit area per unit time is defined as solar constant. Dimension of solar constant is :

 Solar constant is defined as . Solar energy received on earth’s surface per unit Area per unit time
So it has dimensions of intensity  $\mathrm{I}=\frac{\mathrm{E}}{\mathrm{tA}}=\frac{{\mathrm{ML}}^2{ \mathrm{T}}^{-2}}{{\mathrm{TL}}^2}$
Dimensions of solar constant =  $M{L}^0{T}^{-3}$