Caelux
Caelux is a Khosla Ventures backed start-up company based in California. It was founded in 2014 as a spin-out of Caltech.
Caelux's mission is to catalyze the Integrated Power Enhancement solar market category by deploying perovskites technologies at a global scale. It is working on creating scalable, affordable and high-efficiency perovskite solutions.
Caelux attaches the silicon surface to the perovskite in parallel, so the currents are additive, and only the voltage has to be matched.
Caelux expects to reach the rooftop market first, and then the utility and C&I markets subsequently and is setting up a 50 MW prototype line, which can scale to 100 MW when run at 24/7. It will then build up in 100 MW units around the country, placing manufacturing near the customers. One of those 100 MW lines is meant to cost the company around $5 million.
Caelux manufactures perovskite-coated solar glass at its facility in Baldwin Park, California, designed to ramp to 100 MW of annual capacity, and has begun commercial customer shipments of its Active Glass product. Investors include Temasek, Reliance New Energy, Khosla Ventures, Mitsui Fudosan and Fine Structure Ventures.
Contact information for Caelux
14030 Live Oak Ave
Baldwin Park, CA 91706
United States
Caelux and GREW Solar sign 4 GW perovskite-tandem module partnership
Caelux has signed a five-year commercialization partnership with GREW Solar, one of India's fastest-growing solar manufacturers, to supply up to 4 gigawatts (GW) of Caelux's perovskite glass for use in GREW's Hybrid-Tandem™ solar modules. The agreement brings Caelux's total contracted volume with solar module manufacturers globally to 19 GW.
GREW Solar, a venture of the Chiripal Group, will integrate Caelux's Energy Producing Glass with its N-type TOPCon module technology, including its large-format G12R series, to produce modules with two energy-generating layers and efficiencies above 29%. Caelux's approach replaces a module's conventional top glass with a power-generating perovskite layer, allowing manufacturers to add a second active layer to existing silicon module platforms without redesigning their manufacturing lines.
Oxford PV and Caelux join CuspAI's new AI Materials Foundry network
Oxford PV and Caelux are among the founding members of the AI Materials Foundry, a global materials discovery network launched this month by UK-based CuspAI. The initiative brings together more than 45 organizations, pooling data, laboratory capacity, compute and scientific expertise.
The network is built around CuspAI's agentic AI platform, MIRA, which is designed to run complete discovery cycles - from generative materials design through simulation, synthesis route planning and coordinated experimental validation. NVIDIA is providing the compute infrastructure, while Meta's Fundamental AI Research team contributes the Universal Model for Atoms (UMA), a frontier atomistic chemistry model for materials science. Regional hubs are planned for the US, Europe and APAC.
Rayzon Solar and Caelux sign 5 GW deal to make perovskite-silicon modules in India
Indian solar manufacturer Rayzon Solar has reportedly entered a five-year partnership with US-based perovskite technology company Caelux to produce solar modules in India. The agreement covers 5 GW of manufacturing capacity and pairs Caelux's energy-producing solar glass with Rayzon's TOPCon modules, yielding hybrid perovskite-silicon modules with efficiencies of up to 28%.
Caelux's technology replaces a module's conventional top glass with a power-generating perovskite layer, turning the cover glass itself into a second power-generation layer - an approach the company calls a hybrid tandem module. Because the perovskite is integrated at the glass rather than built into the cell from scratch, the method adds a power-generating layer to an otherwise standard silicon module, raising power density and allowing more electricity to be generated from the same surface area.
Solx and Caelux partner to scale perovskite-based PV technology
Solx, a U.S.-based solar manufacturer, and Caelux, a U.S.-based perovskite solar developer, have announced a five-year, 3-gigawatt (GW) strategic partnership and unveiled their breakthrough U.S-made high-performance solar module.

The collaboration integrates Caelux’s advanced energy-producing glass into Solx’s Aurora™ platform, creating a solar module with double power generation layers (hybrid tandem), enabling increased efficiencies of 28% and delivering significantly more power than conventional silicon-only modules.
Caelux completes first commercial shipment of its Active Glass technology
U.S-based Caelux has announced the completion of the first commercial customer order shipment of its proprietary Active Glass technology. This shipment, which will contribute to a leading U.S. solar developer's project, could pave the way for Caelux's commercial launch and market rollout.
As part of the project plans, Caelux's Perovskite Active Glass will be coupled with a silicon solar module to create a Hybrid Tandem™. This Hybrid Tandem module combines two solar technologies in one package, and production is being completed in partnership with a known silicon solar manufacturer.
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