IEC 61853-2:2016

Overview

IEC 61853-2:2016 is an international standard developed by the International Electrotechnical Commission (IEC) within the IEC 61853 series. This standard specifies measurement procedures for evaluating the spectral responsivity, incidence angle effects, and operating temperature of photovoltaic (PV) modules. These tests are crucial for determining the real-world energy output of PV modules, considering varying climatic and installation conditions. IEC 61853-2 provides standardized methods to produce a characteristic set of parameters that support detailed PV module energy predictions and are required inputs for PV module energy rating calculations in IEC 61853-3.

Key Topics

• Spectral Responsivity: Procedures for measuring how PV module output responds to different wavelengths of sunlight, impacting current production under varying spectral conditions.
• Incidence Angle Effects: Methods for determining how the angle of sunlight striking the module surface affects its output power, relevant for modules that operate at non-optimal tilt or azimuth angles.
• Module Operating Temperature: Guidelines for measuring the operating temperature of PV modules in specific ambient and mounting scenarios, as temperature influences module performance.
• Standardized Test Procedures:
  • Indoor and outdoor approaches for measuring incidence angle effects.
  • Use of PV reference devices, data acquisition systems, and temperature sensors.
  • Requirements for preconditioning and visual inspection prior to testing.
• Reporting Requirements: Specifies test report contents, including module identification, test methods used, environmental conditions, measurement results, uncertainties, and compliance aspects.

Applications

IEC 61853-2 provides practical value for several stakeholders in the photovoltaic industry:

• Manufacturers: Supplies a reliable framework to characterize new module designs under varying climate and installation conditions, aiding in product development and comparison.
• Testing Laboratories: Ensures consistency and repeatability in PV module performance evaluation, enabling credible third-party certification and laboratory comparisons.
• System Integrators and Designers: Offers key performance metrics, such as spectral responsivity curves and incidence angle corrections, essential for accurate energy yield modeling and design optimization.
• Investors and Insurers: Delivers detailed, standardized energy output data calculated under real-world conditions, reducing the risk associated with solar project investments.
• Standardized Energy Rating Inputs: The results of IEC 61853-2 are mandatory for the subsequent calculation of energy ratings as described in IEC 61853-3, providing the technical basis for standardized PV module energy yield predictions.

Related Standards

• IEC 61853-1: Photovoltaic module power rating procedures under various irradiance and temperature conditions.
• IEC 61853-3: Energy rating calculation methodology for PV modules, requiring inputs from IEC 61853-2 measurements.
• IEC 61853-4: Provides reference climatic profiles to support standardized energy yield assessments.
• IEC 60904 Series: Covers fundamental PV device testing, including current-voltage characteristics, spectral responsivity, and simulator requirements.
• IEC 61215 and IEC 61646: Define qualification and design approval for crystalline and thin-film terrestrial PV modules.

Summary

IEC 61853-2:2016 enhances the reliability of PV module performance by standardizing the measurement of spectral responsivity, incidence angle effects, and operating temperature. This standard supports accurate energy predictions throughout a PV module's lifecycle, fostering confidence in system modeling, performance comparison, and international market access. By aligning laboratory practices and reporting procedures, IEC 61853-2 plays a vital role in advancing PV module certification and the global solar energy industry.