Explore what is solar energy, how it works, its types, benefits, drawbacks, and applications. Learn how solar power can fuel a cleaner, sustainable future. Learn what solar energy is, how it's harnessed and processed, and pros and cons of solar technology. Solar energy is radiation from the Sun that is capable of producing heat, causing chemical reactions, or generating electricity. The total amount of solar energy incident on Earth is vastly in excess of the world’s energy requirements and could satisfy all future energy needs if suitably harnessed. What is solar energy? Solar energy is the radiant light and heat from the Sun, harnessed using technologies like photovoltaic (PV) panels on on-grid or off-grid solar systems and solar thermal systems to generate electricity or heat. By installing solar panels on rooftops or in open spaces, we can convert sunlight into electricity to run our homes.