First Solar Inc (First Solar) is a company specializing in photovoltaic (PV) solar technology and manufacturing. The company is involved in the design, manufacture, and sale of CdTe solar modules, which convert sunlight into electricity. The company's product portfolio includes Series 6 Plus and Series 7 modules, with power outputs of 464 watts and 532 watts, respectively. First Solar's modules are known for their advanced thin film semiconductor technology, superior temperature coefficient, spectral response, and partial shading response. The company serves a diverse range of customers, including system developers, independent power producers, utilities, commercial and industrial companies, and large corporate energy buyers.

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First Solar has undertaken several R&D initiatives focused on improving the wattage and energy yield of its solar modules, enhancing module durability, and increasing manufacturing efficiencies. The company is investing in the construction and operation of a dedicated perovskite development line and a thin film R&D innovation center in Ohio. These initiatives support the production of full-sized prototypes of thin film single-junction and tandem PV modules. First Solar is also exploring technologies such as bifacial modules, the CuRe program, and perovskite thin films to sustain competitive differentiation and improve the energy output of its modules. The R&D units of First Solar are primarily located at its facilities in Perrysburg, Ohio, and are responsible for conducting R&D activities, qualifying process and product improvements for full production, and systematically deploying them to other facilities. The company also has associates at its California and European Technology Centers supporting the advancement of perovskite technology. In FY2025, the company spent US$191.4 million on R&D, which was 4.5% of its total revenue and grew 22% YoY.