Concentrated solar power (CSP) is also called as concentrated solar thermal. Solar energy can be used to create electricity in two separate ways. First is solar concentrators and the second is photovoltaic systems. Concentrated solar power is a technology that generates electricity by concentrating solar energy in a main point. It is use to focus sunlight. Concentrated solar power plant generates electric power uses mirrors to concentrate the large area of sunlight onto a small area and also focus the sun's energy. CSP can also provide combined power and heat, particularly in desalinization plants. Concentrated solar power technologies subsist in five general types, such as parabolic trough, enclosed trough, concentrating linear Fresnel reflector, dish Stirlings and solar power tower.