Triple Verification Confirms Longi’s Hi-MO X10 “Three Defense” Modules as Industry Leaders in Performance

Three-party Testing by Authoritative Institutions, Owners, and Manufacturers: LONGi’s “Three-proof” Modules Receive Wide Recognition

On September 26, 2025, LONGi Green Energy successfully held a release event for the Hi-MO X10 “Three-proof” module performance data. This event was notable for the collaboration of three leading international testing institutions: the National Solar Photovoltaic Product Quality Inspection and Testing Center (CPVT), TÜV Rheinland, and Jianheng Certification. Together, they revealed the generation data from the LONGi Hi-MO X10 “Three-proof” modules collected over the past year and conducted rigorous evaluations of their performance—specifically their capabilities in fire prevention, shading resistance, and dust accumulation prevention—compared to traditional TOPCon modules.

Importance of Standardized Testing in the Photovoltaic Industry

Photovoltaic components account for only about 40% of the system cost in solar power plants, yet they influence 100% of the power generation performance. In recent years, the photovoltaic industry has experienced rapid technological advancements, transitioning from PERC to TOPCon and now to BC technologies. Each has its advantages and disadvantages, and there is a strong need for empirical data to validate these technologies beyond theoretical laboratory results. However, the current market presents a plethora of complex and sometimes contradictory empirical data, making it difficult for customers to understand and trust. Industry experts are calling for a multi-dimensional and standardized approach to testing photovoltaic power plants, which would help consumers gain clearer insights into photovoltaic products.

Key Findings from the Testing Event

During the event, the CPVT’s Deputy Director, Zhu Xiaogang, awarded the “Three-proof” module testing certificate to LONGi Hi-MO X10, marking the first authoritative test for “Three-proof” modules in the industry. This recognition is significant in demonstrating the module’s exceptional performance and its potential to foster technological advancement and high-quality development in the industry.

The testing results revealed that under 1000W irradiation, the “Three-proof” module maintained a stable temperature of 90.5 degrees Celsius, while the TOPCon module reached 160.5 degrees. Experts indicated that temperatures exceeding 150 degrees could risk melting the encapsulation film and solder strips, posing significant fire hazards. Thanks to HPBC 2.0 battery technology, the LONGi Hi-MO X10 “Three-proof” module has a substantial advantage in fire prevention compared to TOPCon modules. In scenarios with partial shading—such as 50% shading of a single cell—the “Three-proof” module experienced an average power loss of only 10.15%, whereas the TOPCon module suffered a power loss of 36.48%, nearly four times that of the “Three-proof” module. Testing also showed that the “Three-proof” module had a lower average power loss rate of 1.78% in dust accumulation performance tests, compared to 2.51% for the TOPCon module.

Real-world Data from Outdoor Testing

Data from the CPVT’s outdoor testing base in Yinchuan indicated that the “Three-proof” module’s power generation per watt (Wh/kWp) significantly surpassed that of the TOPCon module, achieving a relative gain of approximately 1.42%. Similarly, outdoor testing data from Yantai showed a 1.94% gain for the “Three-proof” module over TOPCon.

Jianheng Certification also released the first genuine outdoor shading testing data after five months of testing at its base in Sanya. Results indicated that in unobstructed conditions, the HPBC 2.0 module demonstrated a 1.82% power gain over TOPCon. In static shading scenarios, mimicking conditions such as bird droppings or tree leaves, the “Three-proof” module achieved a remarkable 50.92% power gain. On sunny days without shading, the HPBC 2.0 module provided a power gain of 3.08% compared to TOPCon, with peak gains reaching 7.86% between 4 PM and 5 PM.

Certification from TÜV Rheinland

TÜV Rheinland analyzed the actual power loss ratios under various shading conditions, including long-edge, short-edge, single-point, multi-point, and diagonal shading. Their findings confirmed that the “Three-proof” module exhibited a 6% reduction in power loss compared to the TOPCon module under simulated bird droppings and dust accumulation. In diagonal shading scenarios, the power loss was reduced by 10% compared to the TOPCon module.

LONGi’s Performance Across Nine Test Sites

LONGi has conducted comparative tests across nine provinces, maintaining consistent installation scenarios. The results demonstrated that the “Three-proof” module outperformed TOPCon in power generation. For instance, data from the test site at LONGi’s headquarters in Xi’an showed that over eight months, the “Three-proof” module provided a cumulative power gain of 2.21% per watt compared to TOPCon. In the Taizhou test site, the “Three-proof” module achieved a 1.5% gain over a year. Additionally, across various locations like Inner Mongolia and Guangdong, the “Three-proof” module consistently exhibited superior performance with an average gain of 2.3% per watt.

Customer Testimonials and Industry Impact

During the event, representatives from various photovoltaic plant owners and EPC partners shared their experiences with the Hi-MO X10 “Three-proof” module. For example, a project manager from Hangzhou noted a 20% increase in generation from a station using the “Three-proof” module compared to a conventional module over three months. Another representative from Shanghai highlighted a significant financial benefit due to the “Three-proof” module’s superior fire prevention capabilities, which resulted in increased generation and revenue for their clients.

As the photovoltaic industry faces pivotal growth opportunities, the emphasis on customer feedback and real-world performance data is essential. LONGi aims to uphold its reputation for reliability, value, and innovation in solar technology while collaborating with partners who share similar aspirations for high-quality solar power plants. The event concluded with a call for rigorous testing standards to become a universal language in the industry, encouraging a shift from parameter and price competition to value-driven competition.