Insolation Energy Limited (INA Solar), through its subsidiary Insolation Green Energy Private Limited, has signed a five-year strategic partnership with US-based Caelux Corporation to commercialise 3 GW of advanced solar modules. Under the deal, Caelux’s proprietary Energy Producing Glass technology will be integrated with INA Solar’s N-Type TOPCon platform.
The two companies aim to develop high-efficiency Hybrid-Tandem modules, targeting up to 29% module efficiency in commercial production by 2028. The design pairs TOPCon solar cells with a Perovskite-based power-generating glass layer, intended to raise energy generation and energy density while reducing the levelized cost of electricity. 
Both sides will also work on technology validation, manufacturing readiness and the regulatory approvals needed, including Approved List of Models and Manufacturers (ALMM) requirements.
Executive comments
Manish Gupta, Chairman, Insolation Energy Limited, said, “This collaboration marks an important milestone for INA Solar. By combining advanced Perovskite technology with our TOPCon manufacturing capabilities, we aim to accelerate the development of high-efficiency solar modules and contribute to India’s renewable energy ambitions.”
Vikas Jain, Managing Director, Insolation Energy Limited, added, “The partnership strengthens our focus on building an integrated solar manufacturing ecosystem. We remain committed to innovation, advanced technology and delivering high-performance solar solutions.”
From the Caelux side, Scott Graybeal, CEO, Caelux Corporation, said, “Our partnership with INA Solar is an important step towards bringing next-generation solar technology into commercial production at scale in India. With this agreement, Caelux’s global contracted volume with module manufacturers exceeds 25 GW validating Caelux’s technology and market approach.”
Vish Iyer, Managing Director, India & West Asia, Caelux Corporation, said, “Integrating Energy Producing Glass with TOPCon technology represents a significant step towards the Indian market benefiting from ultra-high power density solar modules.”
Manufacturing base
INA Solar currently operates three module manufacturing facilities in Jaipur, Rajasthan, with a combined annual capacity of 5.5 GW. It is also developing a 4.5 GW TOPCon solar cell facility and an 18,000 MTA aluminium frame manufacturing facility in Narmadapuram, Madhya Pradesh. The company’s product range covers TOPCon and Mono PERC modules from 500 Wp to 635 Wp, alongside EPC services, and it holds an Independent Power Producer (IPP) portfolio of approximately 400 MW.
Caelux, headquartered in Baldwin Park, California, describes itself as a global leader in Perovskite solar technology. Its Energy Producing Glass converts the top glass of a solar module into an additional power-generating layer, increasing power density and improving project economics.
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