Oxford PV Ships First Commercial Perovskite-on-Silicon Tandem Solar Panels with 24.5% Efficiency to US Client

September 20, 2026

interestingengineering.com USA

Overview

Oxford PV announced the shipment of its first commercial perovskite-on-silicon tandem solar panels to a US customer in September 2024. These 72-cell panels achieve an efficiency of 24.5%, marking the first time a stacked solar cell has been sold for a real-world project, despite being a modest figure compared to laboratory records. This achievement signifies a critical milestone in bringing advanced perovskite solar technology to market, leveraging its ability to capture light wavelengths typically wasted by conventional silicon cells.

In Depth

Key Findings

Oxford PV has achieved a significant commercial milestone, shipping its first commercial perovskite-on-silicon tandem solar panels to a US customer in September 2024. These 72-cell modules demonstrated an efficiency of 24.5%, representing the inaugural sale of stacked solar cells for a practical project. While this efficiency is conservative compared to current laboratory records, it is a crucial step in the real-world deployment and commercialization of perovskite technology, moving it beyond research settings.

Technical Details

The core innovation behind these panels lies in their tandem architecture, which involves coating a thin layer of perovskite, mere hundreds of nanometers thick, onto traditional silicon solar cells. Silicon cells primarily absorb the red and infrared spectrum of sunlight, while the perovskite layer excels at converting higher-energy blue and green light, which silicon typically allows to pass through or dissipates as heat. By combining these materials, the tandem cell can capture a broader spectrum of solar energy, significantly increasing overall power conversion efficiency beyond the theoretical limits of single-junction silicon cells. The reported 24.5% efficiency demonstrates a robust performance for a commercial-grade product.

Background & Context

Perovskite solar cells have garnered immense attention as a next-generation photovoltaic technology due to their high power conversion efficiency and potential for low manufacturing costs. Tandem configurations, in particular, are considered the most promising pathway to surpass the theoretical Shockley-Queisser limit of around 29% for single-junction silicon cells. Oxford PV’s successful commercial shipment signifies a pivotal transition for this innovative technology from experimental validation to practical application. This move is expected to catalyze further investment and development in the perovskite sector, positioning it as a key contender in the future of renewable energy.

Strategic Significance & Outlook

This commercial deployment is a foundational step towards the mass production and widespread adoption of perovskite tandem solar cells. Future challenges will involve enhancing cost-effectiveness, proving long-term durability under diverse environmental conditions, and scaling up manufacturing processes efficiently. Oxford PV’s pioneering effort will likely influence other perovskite developers and solar manufacturers, fostering a competitive landscape that could accelerate the introduction of even more efficient and affordable solar solutions. High-efficiency panels are particularly valuable in space-constrained applications, such as urban installations and rooftop solar, opening new market segments and driving greater global renewable energy penetration.

Source: https://now.solar/2026/09/11/how-stacked-solar-panels-work-interestingengineering-com/

Get our weekly technology intelligence — free

Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.

Subscribe Free — Weekly Tech Intelligence

By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.