IEC 60904-9:20 20适用于光伏测试和校准实验室以及太阳能电池和光伏组件生产线中使用的太阳能模拟器。本文件定义了用于地面光伏设备室内测量的太阳模拟器的分类。根据光谱分布匹配、测试平面内辐照度不均匀性和辐照度时间不稳定性的标准，将太阳模拟器分为A+、A、B或C。本文件提供了确定太阳模拟器在每个类别中的分类所需的方法。不符合C类最低要求的太阳模拟器不能根据本文件进行分类。本文件与IEC TR 60904-14结合使用，IEC TR 60904-14涉及生产线测量单个-标准测试条件下的结光伏组件最大功率输出和报告。 本第三版取消并取代2007年发布的第二版。与上一版相比，此版本包括以下重大技术变更: -更改标题； -增加了扩展波长范围内的光谱匹配分类； -引入新的A+级； -用于光谱辐照度评估的附加参数的定义； -增加了用于光谱辐照度测量和空间均匀性测量的装置部分； -光谱匹配分类的修订程序（最少4个测量位置）； -经修订的辐照度空间均匀性测量程序； -增加了与太阳模拟器光谱辐照度相关的光谱失配误差灵敏度分析的信息性附件。

IEC 60904-9:2020 is applicable for solar simulators used in PV test and calibration laboratories and in manufacturing lines of solar cells and PV modules. This document define classifications of solar simulators for use in indoor measurements of terrestrial photovoltaic devices. Solar simulators are classified as A+, A, B or C based on criteria of spectral distribution match, irradiance non-uniformity in the test plane and temporal instability of irradiance. This document provides the required methodologies for determining the classification of solar simulators in each of the categories. A solar simulator which does not meet the minimum requirements of class C cannot be classified according to this document. This document is used in combination with IEC TR 60904-14, which deals with best practice recommendations for production line measurements of single-junction PV module maximum power output and reporting at standard test conditions.

This third edition cancels and replaces the second edition issued in 2007. This edition includes the following significant technical changes with respect to the previous edition:
- Changed title;
- Added spectral match classification in an extended wavelength range;
- Introduction of new A+ class;
- Definition of additional parameters for spectral irradiance evaluation;
- Added apparatus sections for spectral irradiance measurement and spatial uniformity measurement;
- Revised procedure for spectral match classification (minimum 4 measurement locations);
- Revised measurement procedure for spatial uniformity of irradiance;
- Added informative Annex for sensitivity analysis of spectral mismatch error related to solar simulator spectral irradiance.