US-based Caelux Corporation has signed a deal with Indian solar manufacturers GREW Solar, Rayzon Solar, and Navitas Solar to deploy 5 GW of perovskite-coated glass technology. By allowing manufacturers to boost energy efficiency to nearly 29 percent without major production changes, the partnership aims to launch commercial operations by 2028.
Caelux Corporation has entered into a strategic agreement with three Indian solar module manufacturers—GREW Solar, Rayzon Solar, and Navitas Solar—to integrate its advanced perovskite-coated glass into solar production lines. This partnership covers a combined capacity of 5 GW, marking a significant step for the domestic renewable energy sector as it looks to adopt high-efficiency tandem solar technology.
Boosting Efficiency With Perovskite
The core of this collaboration is Caelux’s proprietary perovskite thin-film technology. Unlike traditional methods that require significant changes to the entire solar cell manufacturing process, this approach involves coating standard module cover glass with a thin layer of perovskite. By doing so, manufacturers can enhance the energy density of their existing production lines without the need for massive factory overhauls. For example, a standard 10 GW TOPCon production line could theoretically scale its power output to 12 GW using this glass, representing a meaningful jump in capacity for domestic players.
The industry currently targets efficiency levels around 23 percent for standard solar modules. Through this partnership, the companies aim to push those figures toward 29 percent, which would significantly improve the performance of solar panels produced in India. This move is designed to make Indian-made modules more competitive in both local and international markets, where demand for higher-density power generation is growing.
Operational Hurdles and Future Outlook
While the potential to increase output is high, the adoption of perovskite-based technology comes with technical challenges. Ensuring the uniformity of the perovskite coating across large surface areas remains a complex engineering task. Furthermore, long-term durability in outdoor environments, where solar modules are exposed to varying weather conditions, is a critical factor for long-term project viability. Caelux has reported that its research and development efforts have focused on mitigating these risks, citing the success of its initial commercial shipments in 2025 as a benchmark.
The timeline for this integration is set for commercial production by 2028. As the global adoption of hybrid-tandem technology continues to expand, with total capacity reaching 19 GW worldwide, these Indian manufacturers are positioning themselves to stay aligned with global technological shifts. The final success of this initiative will depend on how effectively the companies can scale production while maintaining consistent performance and cost-efficiency. Investors and industry stakeholders will likely monitor the progress of the planned manufacturing facilities in India and the actual performance of these modules in real-world conditions once production begins.