Solar power in Thanjavur Sri Saravanas Agencies Solar power refers to the energy derived from the sun's radiation and converted into usable forms of energy, primarily electricity or heat. There are several technologies used to harness solar energy: Photovoltaic (PV) Systems, Concentrated Solar Power (CSP) Systems, Solar Thermal Systems (for Heat). Solar power is not just an energy source; it's a key pillar of India's sustainable development strategy, offering economic, environmental, and energy security benefits.