How This Bifacial Solar Panel Reaches 91% Efficiency

Quick Overview

Tongwei has achieved a record 91.7% bifaciality factor for its 722 W TOPCon solar module, surpassing previous benchmarks and demonstrating the potential of advanced solar cell technology to significantly increase power generation.

Key Points: Tongwei achieved a 91.7% bifaciality factor, a significant technological advancement in solar panel efficiency. This record bifaciality was confirmed by TÜV Rheinland and achieved through a unique "sunken pyramid" structure. The design reportedly enhances selective texture on the non-electrode area and utilizes zebra-crossing passivation contact structures for optimal performance. The breakthrough is particularly significant as it utilizes TOPCon (Tunnel Oxide Passivated Contact) solar cell technology, known for stability and high efficiency. This advancement allows solar panels to capture more light from both the front and back, especially in environments with high albedo (reflectivity) like snow or light-colored surfaces. Bifacial panels, while more expensive and complex to install, offer a significant power gain of 10%-20% over monofacial panels in ideal conditions and up to 30% in snowy environments. Tongwei's success with TOPCon bifacial panels, achieving near premium performance at a lower cost than HJT alternatives, positions them as a leader in next-generation solar technology.

Context: The solar energy industry is constantly pushing the boundaries of efficiency and cost-effectiveness. Bifacial solar panels, which can capture sunlight from both sides, have emerged as a key area of innovation. This video focuses on a significant breakthrough by Tongwei, a major solar manufacturer, in achieving record-breaking bifaciality with their TOPCon solar modules. The context involves the ongoing competition to develop more efficient and affordable solar technologies.

Detailed Analysis

Tongwei has achieved a remarkable 91.7% bifaciality factor for its 722 W TOPCon solar module, a significant leap in solar panel technology. This achievement, confirmed by TÜV Rheinland, was realized through a novel "sunken pyramid" structure which optimizes light capture on both the front and back surfaces of the panel. The design incorporates selective texturing on the non-electrode area and specific passivation contact layers to enhance efficiency. Traditional bifacial panels offer a 10%-20% power gain over monofacial ones, with potential for up to 30% in environments with high albedo, such as snow. While bifacial panels are generally more expensive and complex to install, Tongwei's TOPCon technology offers high performance and stability at a cost that is significantly lower than alternatives like HJT cells. The front-facing side of Tongwei's panels achieves 25.67% efficiency, with the back side reaching an impressive 24.21%, significantly outperforming standard panels. This advancement in bifaciality and efficiency, achieved through advanced manufacturing techniques, positions Tongwei to capture a larger market share in the growing solar industry.