Solar Resource is defined as the amount of solar energy received at a particular site.
Azimuth describes the position of the sun and the PV modules in terms of how many degrees the sun or the PV array is from north.
Irradiance describes how intense the sunlight is at a particular moment in time.
Irradiation refers to the quantity of solar energy received for a given amount of time. One day is a typical time frame.
Solar Window refers to the portion of the sky where the sun appears at a particular location on earth. The solar window varies based on your latitude.
Tilt describes the number of degrees that the PV modules are off of the horizontal surface.
A PV system's location on the earth has a definite effect on the overall performance and system installation effort.
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