⚡ Quick Read
As urban solar installations become increasingly common, partial shading from surrounding structures remains a primary bottleneck for energy efficiency. A recent study conducted by TU Delft in the Netherlands has explored the potential of smart solar modules to overcome these limitations. By integrating buck converters directly into the module architecture, these devices allow individual substrings to operate independently, effectively mitigating the power losses typically associated with shaded cells.
The research team utilized the PVMD Toolbox to simulate eight distinct PV system configurations across three diverse global locations: Rotterdam, Bogotá, and San Francisco. The study compared conventional butterfly modules—using 156 mm × 78 mm half-cut cells and bypass diodes—against smart modules where bypass diodes were replaced by buck converters. These converters enable each substring to track its own maximum power point (MPP) independently.
The findings indicate that smart modules outperform traditional setups, delivering a 15% to 20% increase in energy yield compared to standard string inverters. Even when compared to advanced configurations like microinverters or power optimizers, the smart modules showed a 2% to 3% performance edge. Notably, the study revealed that these systems remain economically viable even if the initial module cost is up to 50% higher than conventional units, as the superior energy harvest offsets the higher capital expenditure in the levelized cost of electricity (LCOE) calculation.
For EPC contractors and solar developers in India, this technology offers a significant opportunity to unlock the potential of constrained rooftop spaces. In dense urban environments where chimneys, parapets, or neighboring buildings create intermittent shadows, traditional string-based systems often suffer from significant output degradation. The ability to maintain high performance despite shading allows developers to maximize the capacity of limited roof areas, potentially improving the return on investment for commercial and industrial (C&I) clients.
The research team is now shifting focus toward applying this power electronics integration to four-terminal perovskite-silicon modules. By embedding converters directly into these next-generation high-efficiency cells, manufacturers could eliminate the need for additional external power electronics, further simplifying system design. As the India renewable energy sector continues to prioritize higher efficiency and space-constrained rooftop deployment, the adoption of smart module technology could become a key differentiator for developers looking to optimize project performance in challenging environments.
Aditya Pathre is the Founder of MVApulse and covers India’s renewable energy sector, including solar, wind, battery energy storage systems (BESS), green hydrogen, transmission infrastructure, renewable energy policy and competitive bidding. His reporting focuses on project developments, market trends, government policies and energy transition across India.
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