Hounen Solar Modules, Superior Durability in Independent PVEL Hail Stress Test

Hounen Solar America Inc., a U.S.-based manufacturer of high-performance solar modules, proudly announces that its HNM7-SHDB144-550/M bifacial module has successfully passed the Hail Stress Sequence (HSS) test conducted by Kiwa PVEL, a globally recognized independent photovoltaic reliability testing laboratory. This achievement underscores Hounen Solar’s commitment to delivering durable, field-tested solar technology designed to perform in the most demanding conditions. 

The HSS test, part of Kiwa PVEL’s Product Qualification Program (PQP), replicates extreme hail events that exceed standard IEC 61215 testing protocols. Modules are subjected to 11 impacts from 45 mm ice balls traveling at terminal velocity (~30.7 m/s), each impact delivering more than 20 joules of energy. 

Exceptional Test Performance 

• Minimal Power Degradation: Average power loss (PMAX) of just 0.57%, far outperforming industry benchmarks. 

• No Visual Defects: No glass fractures or cell damage observed in post-test inspections. 

• Maintained Electrical Integrity: No instances of open circuits, bypass diode failure, or compromised module performance. 

• Outstanding Moisture Resistance: Post-test insulation resistance measured at 12,916 MΩ·m², exceeding IEC 61215:2021 standards. 

“These results validate the strength of our engineering and quality assurance processes,” said Guo Min, Technical Director at Hounen Solar America. “We designed the HNM7-SHDB144 series not only for high efficiency, but also for long-term resilience, and these test results clearly demonstrate that.” 

Technically Advanced, American-Assembled 

The HNM7-SHDB144-550/M module is engineered with: 

• 10BB bifacial monocrystalline PERC technology 

• Up to 21.48% front-side efficiency 

• Rear-side power gain of up to 25% 

• High PID resistance and excellent low-light performance 

• Certifications: IEC 61730, UL 61730; compliant with ISO 9001, ISO 14001, and ISO 45001 standards 

Assembled in Orangeburg, South Carolina, these modules are ideally suited for projects requiring U.S. domestic content and high durability in the field. 

Hounen Solar America | https://hounensolar.com/