First Solar is a provider of photovoltaic (PV) solar energy solutions. Co. designs, manufactures and sells PV solar modules with a thin film semiconductor technology, and also develops and sells PV solar power systems that mainly use the modules it manufactures. Co. also provides operations and maintenance (O&M) services to system owners. Co.'s modules segment involves the design, manufacture and sale of cadmium telluride solar modules, which convert sunlight into electricity. Co.'s second segment is its systems segment, through which it provides power plant solutions, which include project development, engineering, procurement, and construction services and O&M services.