Every solar panel is a compromise between the size of its cells and the power they can carry. Push more current through a big cell and some of it is lost as heat; shade one corner and the whole string feels it. At the Renewable Energy India Expo 2026 in Greater Noida, a company from Surat showed what happens when you simply cut the problem into quarters.
Solex Energy Limited has unveiled TAPI RQ, a solar module the company describes as India’s first quarter-cell module powered by advanced N-type TOPCon technology. The module delivers power output of up to 670 Wp with conversion efficiency of up to 24.80 percent, and it is designed for the utility-scale and high-capacity solar projects where every extra watt per panel turns directly into fewer structures, less land and lower cost per megawatt.
The quarter-cell architecture is the heart of the advance. By dividing each cell into four, the module carries lower current through every string, which the company says improves energy generation, performance and long-term reliability. The module is built for bifacial power generation, so it can harvest reflected light from the rear side as well, and it carries an IP68-rated junction box that seals out dust and water — the kind of detail that matters when a panel is expected to keep working through monsoons, dust storms and desert heat for decades.
Three years, three firsts at REI
TAPI RQ is the third consecutive year Solex has used the REI Expo stage to introduce a new solar technology. At REI 2024, the company presented India’s first solar module powered by rectangular cells; at REI 2025, it unveiled the concept of its TAPI Rear Contact module, moving all metallization to the rear of the cell to eliminate front-side shading. With TAPI RQ in 2026, the company continues a run of bringing differentiated, home-grown cell architectures to the Indian market rather than simply assembling imported designs.
“Innovation has always been central to Solex’s growth journey,” said Dr Chetan Shah, Chairman and Managing Director of Solex Energy. “For three consecutive years at REI, we have introduced technologies that reflect our ambition to push the boundaries of solar manufacturing in India. With TAPI RQ, we are taking another step towards delivering higher efficiency, greater reliability and long-term value to our customers.”
From Surat to the gigawatt era
Solex Energy has been putting what it calls soul in solar since 1995. Headquartered in Surat, Gujarat, the company operates a state-of-the-art, Industry 4.0 enabled, fully automated module manufacturing facility at Tadkeshwar with a production capacity of 4 GW, and it is among the first Indian solar brands listed on the NSE. Its modules serve domestic and international markets, and the company also provides engineering, procurement and construction services across utility-scale, commercial, industrial and institutional projects.
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The launch sits inside a much larger plan. Under its Vision 2030 roadmap, Solex plans to build an integrated renewable energy manufacturing ecosystem with 10 GW of solar cell capacity, 10 GWh of battery energy storage system manufacturing capacity and 2 GW of wafer and ingot capacity, with a proposed investment of Rs 14,300 crore. The company has also signed a memorandum of understanding with the Government of Gujarat outlining a proposed investment of Rs 4,000 crore, including a 5 GW solar cell manufacturing facility to be developed in two phases of 2 GW and 3 GW, alongside a 10 GWh battery storage facility.
The company says TAPI RQ is expected to become commercially available by the end of 2026. Visitors to REI Expo 2026 could see the module alongside the rest of the Solex range at Hall 10, Booth B193 — a quarter-cell panel from Surat, aimed squarely at the gigawatt-scale solar build-out India is now undertaking.
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