First Solar, Inc. engages in designing, manufacturing, marketing, and distribution of photovoltaic solar power systems and solar modules. It operates through the Modules and Systems segments. The Modules segment involves in the design, manufacture, and sale of cadmium telluride solar modules, which convert sunlight into electricity. The Systems segment offers development, construction, operation, and maintenance of photovoltaic solar power systems. The company was founded by Michael J. Ahearn in 1999 and is headquartered in Tempe, AZ.