IEC 62716:2013

Overview

IEC 62716:2013 sets out internationally recognized procedures for testing photovoltaic (PV) modules for their resistance to ammonia-induced corrosion. Published by the International Electrotechnical Commission (IEC), this standard is essential for evaluating PV modules, particularly in environments where ammonia (NH₃) concentrations are high, such as agricultural settings and near livestock operations. By simulating ammonia-rich wet atmospheres, IEC 62716 enables manufacturers and certification bodies to assess the durability and safety of PV modules exposed to corrosive ammonia, helping to ensure long-term performance and reliability in challenging outdoor conditions.

Key Topics

• Ammonia Corrosion Testing: Outlines methodologies to simulate and accelerate ammonia exposure, reproducing the effects that PV modules may encounter in real-world agricultural or industrial settings.
• Test Sequences: The standard combines several tests, referencing IEC 61215, IEC 61646, and IEC 61730-2, to comprehensively evaluate module integrity after ammonia exposure. This includes preconditioning, initial and final measurements, and bypass diode functionality testing.
• Sample Requirements: Provides guidance on the selection and preparation of PV module samples, allowing for representative samples if full-sized modules cannot fit into test chambers.
• Performance Criteria: Defines pass/fail requirements based on power output degradation, visual inspection, electrical safety (wet leakage current, dielectric withstand), and component integrity following ammonia exposure.
• Reporting and Documentation: Specifies requirements for thorough and standardized test reporting, supporting traceability and reproducibility in compliance assessment.

Applications

IEC 62716:2013 is widely used throughout the photovoltaic industry, ensuring that PV modules are suitable for use in environments where ammonia corrosion may otherwise compromise their function or safety. Key practical applications include:

• Farm and Livestock Installations: Solar panels located near barns, stables, or manure storage facilities are subject to high ammonia levels. IEC 62716 testing verifies that PV modules can withstand prolonged exposure without significant degradation.
• Greenhouse and Fertilizer Plant Sites: Facilities where ammonia vapors may be present benefit from modules tested to this standard, reducing the risks of corrosion-induced failures.
• Quality Assurance in Manufacturing: PV module manufacturers employ this test as part of robust quality control processes to certify products for global export or for specific use-cases in corrosive environments.
• Certification and Compliance: Regulatory bodies, certification agencies, and end-users require evidence that PV products meet ammonia corrosion resistance standards before procurement and installation in sensitive regions.

By adhering to IEC 62716, stakeholders can reduce warranty claims, improve product longevity, and ensure sustainable energy solutions in corrosive settings.

Related Standards

To provide comprehensive testing and qualification for PV modules, IEC 62716:2013 should be considered alongside these key standards:

• IEC 61215: Crystalline silicon terrestrial photovoltaic (PV) modules – Design qualification and type approval. Foundational for module performance and reliability.
• IEC 61646: Thin-film terrestrial photovoltaic (PV) modules – Design qualification and type approval. Focuses on thin-film technologies.
• IEC 61730-2: Photovoltaic (PV) module safety qualification – Part 2: Requirements for testing. Addresses module safety under various stress conditions.
• ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories. Ensures laboratory quality management and consistent testing procedures.
• ISO 6988: Metallic and other non-organic coatings – Sulfur dioxide test with general condensation of moisture. Referenced for test chamber procedures, substituting ammonia for sulfur dioxide.

Compliance with IEC 62716 is crucial for PV manufacturers, system integrators, and purchasers aiming to guarantee module reliability and safety in harsh ammonia-rich environments. Leveraging this standard helps ensure optimal system performance and long-term customer satisfaction.