What Are The Specific IEC 61215 And IEC 61730 Certification Requirements For Bifacial Solar Panels With A Dual-glass Configuration, And How Do These Requirements Impact The Installation And Wiring Of A 500 KW Solar Array In A High-wind And High-snow-load Region?

by ADMIN 263 views

IEC Certification and Installation Considerations for Bifacial Dual-Glass Solar Panels in Harsh Conditions

1. IEC Certification Requirements:

  • IEC 61215:

    • Design Qualification: Ensures panels withstand environmental stresses through tests like thermal cycling, humidity freeze, and UV exposure. Dual-glass bifacial panels may have specific criteria due to their structure, focusing on thermal expansion and mechanical integrity.

  • IEC 61730:

    • Safety Standards: Includes tests for electrical insulation, ground resistance, and potential-induced degradation. Dual-glass panels must meet these to ensure safe operation, with attention to electrical connections and frame grounding.

2. Installation Considerations in High-Wind and High-Snow Regions:

  • Mechanical Strength:

    • Dual-glass panels, being heavier and more durable, require secure mounting hardware to withstand high winds and snow loads. Their structure may offer better resistance to impacts from snow and ice.

  • Mounting and Structural Integrity:

    • Panels should be installed at angles that facilitate snow shedding, reducing load. Mounting structures must be engineered to handle static and dynamic loads, considering the panels' weight and environmental stresses.

  • Electrical Wiring and System Design:

    • Wiring must be secured against wind-induced movement. Bifacial panels' rear-side output may influence system wiring, with inverters and combiners sized to handle increased power output, potentially affecting string configuration.

  • Grounding and Bonding:

    • Proper grounding of the panel frame is crucial for safety, as per IEC 61730, to prevent electrical hazards.

  • Testing and Certification:

    • Additional assessments may be required for bifaciality factor, influencing installation spacing and alignment to maximize rear-side efficiency.

3. Environmental and Performance Considerations:

  • Power Rating and System Sizing:

    • The increased efficiency of bifacial panels may necessitate larger system components to manage higher power output, optimizing energy production in a 500 kW array.

  • Rigorous Environmental Testing:

    • Panels must undergo tests for mechanical stress, ensuring durability under high winds and snow loads, potentially performing better than traditional modules.

Conclusion: IEC certifications ensure bifacial dual-glass panels meet durability, safety, and performance standards. Installation in harsh conditions requires careful consideration of mechanical strength, secure mounting, proper wiring, and system design to ensure safe and efficient operation.