Energetica India Magazine March - April 2026

TOPCON TECH energetica INDIA- Mar-Apr_2026 43 Energy Yield in Real Conditions: Beyond Lab Efficiency Standard test condition efficiency does not fully capture re- al-world performance. Factors such as temperature coeffi- cients, low-light behaviour, and bifacial gain significantly in- fluence actual energy output. TOPCon modules demonstrate a lower temperature coeffi- cient (typically around -0.30%/°C compared to ~-0.35%/°C for PERC), allowing them to perform better in India’s high-tem- perature environments. Additionally, their higher bifaciality factor often exceeds 80 percent which enables greater energy generation from reflected light, particularly in utility-scale in- stallations with optimised ground conditions. Studies indicate that TOPCon modules can deliver 5–8 percent higher energy yield compared to PERC under real operating conditions, with even higher gains in bifacial configurations. GREW Solar’s approach goes beyond module efficiency to fo- cus on total energy yield. By optimising bifacial module design and ensuring compatibility with Indian site conditions, the company is working to maximise generation across the project lifecycle. This includes engineering modules that perform reli- ably under high heat, dust, and variable irradiation, conditions typical of Indian solar parks. Lowering LCOE: The Economic Imperative For utility-scale solar, the ultimate metric is the levelised cost of electricity (LCOE). Achieving India’s renewable targets de- pends not just on capacity addition, but on making solar the most economically viable source of power. Higher efficiency modules reduce balance-of-system costs by lowering the number of panels, mounting structures, and land required. At the same time, improved energy yield increases lifetime generation, enhancing project revenues. The combination of these factors results in a measurable re- duction in LCOE. Industry analyses suggest that transitioning from PERC to TOPCon can reduce LCOE by 3–5 percent, de- pending on project configuration and geography. In a price-sensitive market like India, even marginal reductions in LCOE can accelerate adoption and improve project bank- ability. GREW Solar is positioning its TOPCon portfolio as a driver of long-term project economics. By focusing on high-efficiency modules with lower degradation rates typically around 1 per- cent in the first year and ~0.4 percent annually thereafter, the company aims to improve lifetime energy output and financial returns. This aligns with the needs of developers, investors, and DISCOMs who are increasingly evaluating projects on life- cycle value rather than upfront tariffs. Supporting India’s Manufacturing Ambitions The Viksit Bharat vision is not limited to deployment; it also emphasises domestic manufacturing and supply chain resil- ience. Government initiatives such as the Production Linked Incentive (PLI) scheme and Domestic Content Requirement (DCR) policies are encouraging the development of an inte- grated solar manufacturing ecosystem. The transition to N-type technologies presents both a challenge and an opportunity. While it requires significant investment in new manufacturing lines and process upgrades, it also allows India to leapfrog legacy technologies and align with global in- novation trends. GREW Solar is actively contributing to India’s manufacturing ambitions by expanding its capabilities in advanced module technologies. The company’s focus on N-type TOPCon aligns with the broader national push for indigenisation, reducing dependence on imports while ensuring access to cutting-edge technology. By building capacity in India, GREW is support- ing both energy security and economic growth key pillars of the 2030 and 2047 vision. The Future of High-Efficiency PV Modules As the industry moves forward, the shift toward N-type tech- nologies is expected to accelerate. TOPCon is already becoming the preferred choice for new manufacturing capacity globally, and its compatibility with future innovations such as tandem cell architectures makes it a strong foundation for continued efficiency improvements. For India, adopting these technologies at scale will be critical to meeting its long-term energy goals. High-efficiency modules will enable more power generation from limited resources, re- duce costs, and strengthen the country’s position in the global renewable energy landscape. GREW Solar sees TOPCon not as the end state, but as a step- ping stone toward the next generation of photovoltaic innova- tion. The company is focused on continuous improvement by enhancing efficiency, reliability, and scalability to ensure that its solutions remain aligned with evolving industry standards and national priorities. As India advances toward its Viksit Bharat milestones, the importance of efficient, reliable, and cost-effective solar technology cannot be overstated. N-type TOPCon technology is emerging as a key enabler of this jour- ney by bridging the gap between ambition and execution, and shaping the future of utility-scale solar in the country.