Perovskite-silicon solar technology company Tandem PV has begun demonstration manufacturing in Fremont, California. In a 65,000-ft2 facility, Tandem PV is producing tandem perovskite-silicon solar panels. The line can accommodate 40 MW of annual capacity.
Tandem PV perovskite-silicon solar panel production in Fremont, California.
“This factory marks the shift from impressive R&D results to repeatable manufacturing at a commercially meaningful scale,” said Tandem PV CEO Scott Wharton. “People have talked for years about the promise of perovskites. This is what it looks like to deliver. It is an important milestone in restoring American leadership in solar manufacturing through the kind of breakthrough engineering Silicon Valley is known for.”
Tandem PV’s proprietary technology combines a thin perovskite light-absorbing layer with a conventional silicon solar cell. By capturing more of the solar spectrum than silicon alone, tandem panels generate more electricity from the same footprint.
Tandem PV’s demonstration panel. No technical details were provided.
The Fremont opening builds on recent R&D progress that Tandem PV is now translating into production panels, including 29.7% efficiency based on internal testing. In accelerated lifetime testing, the company says the latest-generation panels show less than 1% average annual power loss, about a tenfold improvement versus the company’s results from a year ago. Tandem PV is targeting 25+ year performance consistent with industry standards and warranty requirements for utility-scale solar projects.
With the Fremont site now operating, Tandem PV has begun producing initial modules, with shipments planned to support customer validation trials later this year. The company plans to sell its first commercial panels in 2026 from this facility and is targeting high-volume manufacturing in 2028.
