The electricity used to power our daily activities is still primarily generated from fossil fuels. This kind of power generation pollutes the environment through the emission of CO². Moreover, fossil fuels are finite -- and once used, are gone forever. For this reason alone, alternative forms of renewable power generation provide a more intelligent solution to powering our lives. Photovoltaic systems provide energy to meet our needs without contributing to the green house effect and are a genuine alternative to conventional energy generation.  They are considered to be the ultimate solution because they convert sunlight directly into electricity.