To develop and implement solar technologies, it is necessary to know accurately the solar resource on the place. In Ecuador, meteorological stations measuring solar irradiation are scarce, in consequence it is usual to use satellite estimations for those implementations. In this work the solar resource of Ecuador was built using satellite estimations given by the National Solar Radiation Data Base (NSRDB) from the National Renewable Energy Laboratory (NREL) of USA. To have confidence on such data, a comparison of the estimation with ground measurements of the Global Horizontal Irradiation (GHI) from 53 stations was conducted. The bias found in such a comparison is lower than 8% that is accurate enough to be used for this solar map.