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Harold McMaster

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First Solar

Harold McMaster · 1999

First Solar is a U.S. solar panel manufacturer that builds cadmium telluride (CdTe) thin-film modules in domestic factories. It was founded in 1990 as Solar Cells, Inc. by Harold McMaster, acquired and rebranded in 1999, and went public in 2006. Its technology diverges from mainstream silicon PV. As of March 2026, it had ~14 GW of annual domestic nameplate capacity across facilities in Ohio, Alabama, and Louisiana. It does not produce silicon panels, does not operate overseas factories, and does not integrate storage or software.