Partnership Overview
On July 22, 2026, in Surat, Gujarat, Rayzon Solar Limited, one of India’s largest solar PV module manufacturers, and Caelux Corporation, a global leader in perovskite solar technology, announced a five‑year partnership aimed at jointly commercialising up to 5 GW of perovskite‑plus‑silicon (Hybrid Tandem) solar modules. The collaboration will integrate Caelux’s proprietary energy‑producing solar glass— which replaces the conventional top glass with a second power‑generating perovskite layer— with Rayzon’s advanced TOPCon bifacial module technology.
Technology Integration
The resulting Hybrid Tandem modules are projected to achieve a record‑breaking conversion efficiency of 28%, significantly higher than conventional silicon‑only modules. Caelux’s glass technology is claimed to increase module energy density by up to 30% and improve levelized cost of electricity (LCOE) by 20% or more, delivering a step‑function advancement for the solar industry.
Manufacturing Capacity and Timeline
Rayzon will leverage its 11.31 GW ALMM‑listed manufacturing platform, which includes large‑scale bifacial production lines, to overlay Caelux’s glass onto its TOPCon cells. The company is also in the advanced stage of commissioning a 5.1 GW TOPCon solar cell manufacturing plant, further strengthening its backward‑integrated ecosystem. Early integration work is already underway, with commercial‑scale volumes expected to be available by 2028. These modules will be eligible for India’s government‑tendered utility market, supported by the Ministry of New and Renewable Energy’s Production Linked Incentives (PLI) and the Approved List of Models and Manufacturers (ALMM) requirements.
Strategic Context
The partnership aligns with India’s “Make in India” vision and the country’s ambitious clean‑energy target of 500 GW of solar capacity by 2030. By domesticating high‑efficiency perovskite‑silicon technology, the collaboration seeks to accelerate the nation’s transition to clean energy while meeting the scale demanded by the PLI schemes.
Company Profiles
Rayzon Solar Limited operates advanced manufacturing facilities in Kim and Kosamba, Surat, and holds an annual ALMM‑listed module capacity of 11.31 GW. It is commissioning a 5.1 GW TOPCon cell plant, collaborates with the University of New South Wales on R&D, participates in the United Nations Global Compact, holds an EcoVadis Silver Rating, and has published Environmental Product Declarations for its portfolio. Rayzon has received the CII Performance Excellence Award 2026 and the ELLE Sustainability Awards 2025.
Caelux Corporation, headquartered in Baldwin Park, California, develops and manufactures perovskite solar technology that transforms the top glass of solar modules into a second power‑generation layer. The company emphasizes low‑cost, scalable manufacturing and claims its technology can boost module power density by up to 30% and cut LCOE by at least 20%.
Statements from Leadership
"We are dedicated to fulfilling India’s vision of establishing world‑class, high‑quality solar manufacturing at scale," said Chirag Nakrani, Co‑Founder & Managing Director of Rayzon Solar. "By partnering with Caelux, we are furthering our technology leadership and strengthening India’s position at the forefront of next‑generation solar manufacturing."
Scott Graybeal, CEO of Caelux, added, "As India is one of the top solar manufacturing countries in the world, it is a strategic destination for us. This partnership is a critical step in Caelux’s growth trajectory as we look to scale our technology globally."
Amit Barve, CEO of Rayzon Solar, noted that the partnership accelerates domestic manufacturing at the efficiency frontier, essential for meeting India’s 500 GW solar goal. Vish Iyer, Managing Director, India & West Asia at Caelux, expressed excitement about the partnership’s massive impact on the Indian solar market.
Forward‑Looking Statements
The press release contains forward‑looking statements regarding technology commercialisation, manufacturing capacity, efficiency performance, production volumes, and timelines. These statements are subject to risks including technology development challenges, regulatory approvals, market conditions, supply‑chain factors, and policy changes. Neither Rayzon Solar nor Caelux undertakes any obligation to update these statements.