⚡ Quick Read
The global solar industry is on the cusp of a technological shift as Tandem PV prepares to bring the world’s most efficient solar panels to the commercial market. By leveraging a perovskite-on-silicon tandem architecture, the company aims to move beyond the current efficiency plateaus of standard crystalline silicon modules. With the first production-quality units already shipped, the company is positioning itself to disrupt the market by offering a modular solution that significantly increases power density.
Tandem PV’s technology utilizes a 4-terminal (4T) mechanically-stacked design, where a perovskite layer is deposited onto the top glass of a standard silicon cell. This approach allows the product to be cell-agnostic, meaning it can be paired with PERC, TOPCon, or HJT silicon cells. In its record-breaking 30.4% efficiency module, approximately 22% of the output was derived from the silicon base, while the perovskite layer contributed an additional 8%.
The company is addressing historical concerns regarding perovskite stability by promising a 30-year warranty with a degradation rate of 1% or less per year. Furthermore, the modules are designed to feature a temperature coefficient of approximately -0.15%/°C, which is roughly half that of conventional silicon modules, offering a distinct performance advantage in India’s high-temperature climate. Tandem PV expects to scale to gigawatt-level manufacturing by 2028, with a roadmap to reach 37% efficiency by 2030 through incremental engineering improvements.
For Indian EPC contractors and solar developers, the introduction of high-efficiency solar panels represents a potential reduction in Balance of System (BoS) costs. By generating more power from the same physical footprint, developers can optimize land usage—a critical factor in India’s competitive renewable energy landscape. The cell-agnostic nature of the product also provides flexibility, allowing developers to source silicon cells domestically while utilizing Tandem’s high-efficiency glass layer, potentially aligning with local content requirements.
The immediate focus for Tandem PV is transitioning from R&D processes to full-scale production. The company will initiate paid pilot deployments with independent power producers (IPPs) later this year to gather the 6 to 12 months of field data required for bankability. As the India renewable energy sector continues to push for higher capacity additions and improved project economics, the adoption of such advanced tandem technologies could become a key differentiator for large-scale utility projects seeking to maximize generation within limited land parcels.
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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