Making Solar Energy Economical The history of human inventions and advancement in technology cannot be mentioned without direct reference to engineering. From the ancient period of the Stone Age to the shipbuilding age and the development of nuclear power, one fact remains unquestioned, and that is the rise of several marvels attributed to the level of the engineering prowess. However, this is not to say that there are no challenges that demands attention from engineers. As a matter of fact, there have been consistent grand challenges which demands urgent attention from engineers (Bak et al., 2002). One such challenge rests in making the solar energy economical. Utilization of solar energy has not been substantially undertaken in the 21st century. This is against the need to have a constant supply of secure, clean, green and sustainable energy (Bak et al., 2002). There is no doubt that tapping into solar energy as an alternative to the commonly used fossil fuels has bee...