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All PV cells have a temperature coefficient that reduces their productivity in heat. some preform better than others. Thin-film is notable example. Placing large PV farms in the desert is mainly about two things: High insolation value and cheap land that is easy to build on. Many of the desert regions have very few cloudy days each year offering more available sunlight hours improving the annual production of the system. Second, land in the desert regions are orders of magnitude cheaper to buy than other areas. This drives down overall project cost and improves the IRR. In addition to the land being cheap, it hold little economic value for much else. If it can be used for generating power, then local authorities are often favorable when reviewing these projects.



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