Solx and Caelux form five-year strategic partnership to produce perovskite-silicon tandem solar modules in Puerto Rico

Type: Partnership · Technology: Solar · Country: United States · Capacity: 3 GW · Announced: 2026-04-22

Solx, a solar module manufacturer based in Aguadilla, Puerto Rico, and Caelux, a manufacturer of perovskite-coated glass, announced a five-year strategic partnership to produce perovskite-silicon tandem solar modules. The collaboration will see Solx's Puerto Rico facility deliver 3 GW of Solx Aurora modules, which integrate Caelux's 'Active Glass' top layer to achieve 28% power conversion efficiency, replacing conventional top glass in silicon-based panels. Commercial volumes of the hybrid tandem modules are expected to reach the U.S. market by 2027, following the deployment of a beta version in a project with a U.S.-based developer. Solx sources its silicon cells from Suniva, which procures raw materials from Corning's facility in Hemlock, Michigan, and plans to build a new 4.5 GW facility in South Carolina. The partnership aligns with Solx's goal of achieving 10 GW of manufacturing capacity by 2030, with the Puerto Rico plant initially targeting 1 GW per year of 625-watt modules using steel frames from Origami Solar. Solx CEO James Holmes described the integration of Caelux's technology as a defining moment for American energy manufacturing, emphasizing gigawatt-scale production and domestic supply chain strengthening.

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