“Solar radiation, often called the solar resource or just sunlight, is a general term for the electromagnetic radiation emitted by the sun. Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies. However, the technical feasibility and economical operation of these technologies at a specific location depends on the available solar resource.”

Explore US DOE EERE’s “Solar Radiation Basics” Website to continue reading – includes: Basic Principles; Diffuse and Direct Solar Radiation; Measurement, Distribution; and Solar Energy Resource Maps