Regarding the energy storage concentrated solar power plants (CSP) are gaining interest as in Parabolic Trough Collectors (PTC) or Solar Tower Collectors (STC). In INDIA electricity generated by CSP is increasing with high rate in every year. On cloudy days CSP’s having short term variations and also at night they can’t provide energy and hence Thermal Energy Storage (TES) or Backup System (BS) is used to operate continuously. For optimum design and operation of CSP throughout year, an accurate estimation of solar irradiation is needed as well as defining the required TES or BS. INDIA has solar radiation of 1700 – 1900 kWh per kilowatt peak with more than 300 clear sky days therefore INDIA has higher potential for solar electricity generation per watt setup, The paper reviews Concentrated Solar Power technology and design, PTC design, STC advantages, adopted model approach and equations
