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Solar power provides a great promise and hope to minimize the gap between energy requirement and delivery and availability as well. The simultaneous energy demand in connection with the depleting predictable power sources requires the efficient use of the inexhaustible energy resources. The green property and inexhaustibility are the two basic properties inherited naturally to solar energy make it most suitable to get the maximum of it. The solar energy has significantly increased its share recently both in rural and urban regions in the form of solar farming and building installations. The energy so far harnessed from the sun radiations has been proved to be a proficient elucidation to the world's power aspirations. It becomes paramount to acquire absolute knowledge and precise comprehension of various aspects dealing with solar energy. The paper is compilation of a complete narrative reassess and guesstimation of the solar energy harnessing techniques such as MPPT, econometrics, equations for finding angles, temperature of the cell and forecasting methodologies that are being discussed. Among the accessible previous and latest available methods a few of them notably have been projected and presented with their appropriate flowcharts, block diagrams and algorithms. The paper is valuable for a researcher to opt any of these proposed methodologies, equations depending upon his necessity, constraints, relevance and concern as well. [ABSTRACT FROM AUTHOR]