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The facility aims to validate large-format tandem modules for a 2026 launch
April 21, 2026
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Perovskite-based solar panel developer Tandem PV has opened a 40 MW commercial demonstration factory in Fremont, California, marking a step toward scaling up next-generation perovskite-silicon solar manufacturing in the U.S.
The 65,000-square-foot facility is designed to transition the company’s technology from laboratory-scale development to commercial production for utility-scale applications.
The Fremont facility produces tandem solar panels that integrate a thin perovskite layer with a conventional silicon solar cell to capture more energy across a broader portion of the solar spectrum.
The company reported internal testing results showing module efficiency of 29.7%. In accelerated lifetime testing, the latest generation of panels recorded an average annual power degradation of less than 1%, representing about a tenfold improvement over the previous year’s results.
According to the company, this design increases power output per unit area compared to traditional silicon panels, helping lower overall system costs. While module efficiency is critical, about 75% of utility-scale solar project costs are attributable to land, labor, and balance-of-system components, making higher-efficiency panels economically significant.
The production line uses advanced manufacturing equipment and produces panels approximately 60 times larger than those produced by the company’s earlier research and development devices.
Tandem PV had raised $50 million in Series A and debt funding, intended for the construction of a commercial-scale manufacturing facility and to accelerate the adoption of its solar panels.
Last November, researchers at the Massachusetts Institute of Technology reported developing a lightweight, two-dimensional polyaramid polymer that can serve as a protective coating for solar cells, electronics, and infrastructure. This degree of impermeability positions the material as a potential barrier to slow degradation and corrosion in technologies such as perovskite solar cells.
In 2025, a study by the U.S. Department of Energy’s National Renewable Energy Laboratory reported improved perovskite solar cell performance by replacing the commonly used fullerene (C60) electron transport layer with a newly synthesized ionic salt, referred to as CPMAC.
Meghana Prasad
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