In the use of solar energy as a source of renewable energy a practical question is commonly encountered. “What is the optimal angle of inclination for fixed solar panels?” This is applicable for both arrays of solar photovoltaic (PV) panels as well as for flat plate solar collectors. It is quite common practice to use a couple of rules of thumb that state the following: (a) the panels/collectors should be facing south (for the northern hemisphere locations), and (b) the optimal angle of inclination will be in the range of the location latitude ± 15°. In this paper we discuss a computer program developed to verify (b) for south facing fixed solar panels/collectors. The program developed can generate theoretical solar irradiation that will be available for a given location in the northern hemisphere on a clear day taking into account the attenuation effects in the atmosphere by incorporating the concept of air mass. It can also be used to retrieve solar irradiation data from well established databases such as the National Solar Radiation Data Base (NSRDB) [1–2] accessible via the National Renewable Energy Laboratory (NREL). Both approaches have been tested and weekly, monthly and annual optimal angles of inclination have been generated for selected locations. This paper discusses the details of the algorithm and code developed and the results obtained. How this program is going to be used in an undergraduate course titled “Alternative Energy Systems and Applications” are also discussed.