Tandem PV Opens California Factory for Advanced Next-Generation Solar Manufacturing
Tandem PV, a leader in high-efficiency perovskite-silicon solar technology, today announced the official launch of its commercial demonstration factory in Fremont, California. The facility marks a significant milestone in the company’s mission to commercialize next-generation, U.S.-manufactured solar panels designed for utility-scale energy generation.
The opening comes at a critical moment for the global energy sector. Electricity demand is rising rapidly worldwide, driven in part by the expansion of data centers, cloud computing infrastructure, and artificial intelligence workloads. These energy-intensive technologies are placing unprecedented pressure on power grids, prompting utilities to accelerate investment in new generation capacity. Against this backdrop, Tandem PV’s Fremont facility is positioned as a strategic step toward scaling advanced solar manufacturing domestically while reducing reliance on overseas supply chains.
The company’s new production line is designed not only to manufacture solar panels, but also to demonstrate that perovskite-silicon tandem technology can be reliably produced at industrial scale in the United States. By doing so, Tandem PV aims to prove that its next-generation solar modules can deliver a combination of high efficiency, long-term durability, and lower overall system costs—three critical factors for widespread adoption in utility-scale projects.
Located in the heart of Silicon Valley, the 65,000-square-foot Fremont facility is equipped with advanced manufacturing systems that support precision fabrication of tandem solar modules. The site currently has an estimated annual production capacity of approximately 40 megawatts, placing it in the category of a demonstration-scale but commercially meaningful facility. It serves as a bridge between Tandem PV’s laboratory research environment and full-scale industrial production, helping the company transition from experimental validation to real-world deployment.
A notable feature of the Fremont operation is the scale of its production output compared to earlier development work. The solar panels manufactured at this facility are roughly 60 times larger than the company’s original research and development prototypes. This dramatic increase in size is essential for validating large-format manufacturing techniques, ensuring consistency, and identifying performance characteristics under conditions that closely resemble real-world deployment. It also provides critical data needed to refine processes for future high-volume manufacturing.
“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.”
At the core of Tandem PV’s innovation is its proprietary perovskite-silicon tandem architecture. The technology integrates a thin layer of perovskite—a highly efficient light-absorbing material—on top of a traditional silicon solar cell. This layered configuration enables the panel to capture a broader spectrum of sunlight compared to silicon alone, significantly increasing the amount of electricity generated from the same physical footprint.
This improved energy conversion efficiency has important economic implications. In utility-scale solar projects, a large portion of total costs is not directly tied to solar panel manufacturing but instead comes from land use, labor, installation, wiring, and other balance-of-system components. These factors collectively account for approximately 75% of total project costs. By increasing energy output per panel, Tandem PV’s technology has the potential to reduce the overall cost of electricity generation while improving land-use efficiency and system performance.
The Fremont factory builds on a series of recent technical advancements achieved through Tandem PV’s research and development program. These improvements are now being translated into production-ready modules. Internal testing conducted by the company has demonstrated efficiency levels reaching up to 29.7%, representing a significant advancement in solar cell performance. This level of efficiency places tandem solar technology well above conventional silicon-only panels, which typically operate at lower conversion rates.
Durability and long-term reliability are also central to the company’s commercialization strategy. In accelerated lifetime testing, Tandem PV’s latest-generation panels have shown less than 1% average annual power degradation. This represents an approximately tenfold improvement compared to performance results recorded just one year earlier. Such progress is critical for utility-scale deployment, where solar installations are expected to operate reliably for decades. Tandem PV is targeting a product lifespan of more than 25 years, aligning with established industry standards and long-term warranty expectations for large solar installations.
“Utility-scale perovskites are here,” said Jennifer Granholm, former U.S. Secretary of Energy. “Tandem PV is delivering an ingenious product that can help provide more clean power with a smaller footprint and meaningful cost savings as we scale deployment in the United States.”
With the Fremont facility now fully operational, Tandem PV has begun producing its first batch of commercial solar modules. These initial units are not yet intended for mass deployment but will instead be used for customer validation trials scheduled to take place later this year. These trials are an important step in the commercialization process, allowing potential customers—such as utilities and large energy developers—to evaluate performance, durability, and system integration in real-world conditions.
The company has outlined a phased commercialization roadmap following this demonstration stage. Tandem PV expects to begin its first commercial sales in 2026, with production originating directly from the Fremont facility. This initial market entry will mark the company’s transition from demonstration-scale manufacturing to early commercial supply.
Looking further ahead, Tandem PV has set ambitious goals for scaling its operations. By 2028, the company aims to achieve high-volume manufacturing capabilities, enabling widespread deployment of its tandem solar technology across utility-scale energy projects. This long-term strategy reflects growing global demand for more efficient, cost-effective, and domestically produced renewable energy solutions.
As energy systems around the world continue to evolve, innovations like tandem solar technology are expected to play a critical role in meeting rising electricity needs while supporting decarbonization goals. Tandem PV’s Fremont facility represents an important step in that direction, combining advanced materials science, precision manufacturing, and scalable production infrastructure to help shape the next generation of solar energy technology.
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