BS EN IEC 60904-7:2019 - Photovoltaic Devices: Computation of the Spectral Mismatch Correction for Measurements of Photovoltaic Devices

In the ever-evolving world of renewable energy, precision and accuracy in measurement are paramount. The BS EN IEC 60904-7:2019 standard is an essential tool for professionals in the photovoltaic industry, providing a comprehensive guide to the computation of spectral mismatch correction for measurements of photovoltaic devices. Released on November 5, 2019, this standard is a critical resource for ensuring that photovoltaic devices are measured with the highest degree of accuracy.

Understanding the Importance of Spectral Mismatch Correction

Photovoltaic devices, commonly known as solar panels, convert sunlight into electricity. However, the efficiency of this conversion can be affected by various factors, one of which is the spectral distribution of the light source used during testing. The spectral mismatch correction is a crucial calculation that adjusts for differences between the spectrum of the light source used in testing and the standard solar spectrum. This ensures that the performance measurements of photovoltaic devices are accurate and reliable.

Key Features of BS EN IEC 60904-7:2019

• Standard Number: BS EN IEC 60904-7:2019
• Pages: 18
• Release Date: November 5, 2019
• ISBN: 978 0 580 97364 2
• Status: Standard

This standard provides detailed methodologies for calculating the spectral mismatch correction factor, which is essential for accurate performance evaluation of photovoltaic devices. It is designed to be used by manufacturers, testing laboratories, and researchers who are involved in the development and testing of photovoltaic technologies.

Why Choose BS EN IEC 60904-7:2019?

The BS EN IEC 60904-7:2019 standard is a vital document for anyone involved in the photovoltaic industry. Here are some reasons why this standard is indispensable:

1. Ensures Measurement Accuracy

By providing a standardized method for calculating spectral mismatch correction, this document ensures that measurements of photovoltaic devices are consistent and accurate. This is crucial for comparing the performance of different devices and for verifying compliance with industry standards.

2. Supports Innovation and Development

As the photovoltaic industry continues to innovate, having a reliable standard for measurement is essential. This document supports the development of new technologies by providing a clear framework for evaluating their performance.

3. Facilitates International Collaboration

With its status as an international standard, BS EN IEC 60904-7:2019 facilitates collaboration and communication between organizations and professionals across the globe. This is particularly important in a field like renewable energy, where global cooperation is key to addressing environmental challenges.

Who Should Use This Standard?

This standard is designed for a wide range of professionals in the photovoltaic industry, including:

• Manufacturers: Ensure that your products meet international standards for performance and reliability.
• Testing Laboratories: Use the standard to provide accurate and consistent testing services.
• Researchers: Apply the methodologies in your studies to ensure that your findings are based on reliable data.
• Quality Assurance Professionals: Implement the standard to maintain high-quality control in the production and testing of photovoltaic devices.

Conclusion

The BS EN IEC 60904-7:2019 standard is an indispensable resource for anyone involved in the measurement and evaluation of photovoltaic devices. By providing a clear and standardized method for calculating spectral mismatch correction, it ensures that measurements are accurate, reliable, and consistent across the industry. Whether you are a manufacturer, a testing laboratory, or a researcher, this standard will help you achieve the highest levels of precision in your work, supporting the continued growth and innovation of the photovoltaic industry.

Invest in the BS EN IEC 60904-7:2019 standard today and ensure that your photovoltaic measurements are as accurate and reliable as possible.

BS EN IEC 60904-7:2019

• 29.100.10 Magnetic components
• 27.160 Solar energy engineering

This part of IEC 60904 describes the procedure for correcting the spectral mismatch error introduced in the testing of a photovoltaic device, caused by the mismatch between the test spectrum and the reference spectrum (e.g. AM1.5 spectrum) and by the mismatch between the spectral responsivities (SR) of the reference device and of the device under test and therewith reduce the systematic uncertainty. This procedure is valid for single-junction devices but the principle may be extended to cover multi-junction devices.

The purpose of this document is to give guidelines for the correction of the spectral mismatch error, should there be a spectral mismatch between the test spectrum and the reference spectrum as well as between the reference device SR and the device under test SR. The calculated spectral mismatch correction is only valid for the specific combination of test and reference devices measured with a particular test spectrum.

Since a PV device has a wavelength-dependent spectral responsivity, its performance is significantly affected by the spectral distribution of the incident radiation, which in natural sunlight varies with several factors such as location, weather, time of year, time of day, orientation of the receiving surface, etc., and with a solar simulator varies with its type and conditions. If the irradiance is measured with a thermopile-type radiometer (that is not spectrally selective) or with a PV reference device (IEC 60904-2), the spectral irradiance distribution of the incoming light must be known to make the necessary corrections to obtain the performance of the PV device under the reference spectral irradiance distribution defined in IEC 60904-3.

If a reference PV device or a thermopile type detector is used to measure the irradiance, then, following the procedure given in this document, it is possible to calculate the spectral mismatch correction necessary to obtain the short-circuit current of the device under test under the reference spectral irradiance distribution in IEC 60904-3 or any other reference spectrum. If the reference PV device has the same relative spectral responsivity as the device under test then the reference device automatically takes into account deviations of the measured spectral irradiance distribution from the reference spectral irradiance distribution, and no further correction of spectral mismatch errors is necessary. In this case, location and weather conditions are not critical when the reference device method is used for performance measurements under natural sunlight. Also, for identical relative SRs, the spectral classification of the simulator is not critical for measurements with solar simulators.

If the performance of a PV device is measured using a known spectral irradiance distribution, its short-circuit current at any other spectral irradiance distribution can be computed using the spectral responsivity of the PV device under test.