IEC TS 61724-3:2016（E）定义了一个程序，用于根据测试利益相关者定义的实际天气条件，相对于同一系统的预期电能生产，测量和分析特定光伏系统的能量生产。能量生产的特点是系统运行时（可用）；系统不运行（不可用）的时间被量化为可用性度量的一部分。本技术规范的目的是定义一个程序，用于将测量的电能与光伏系统的预期电能进行比较。

IEC TS 61724-3:2016(E) defines a procedure for measuring and analyzing the energy production of a specific photovoltaic system relative to expected electrical energy production for the same system from actual weather conditions as defined by the stakeholders of the test. The energy production is characterized specifically for times when the system is operating (available); times when the system is not operating (unavailable) are quantified as part of an availability metric. The aim of this technical specification is to define a procedure for comparing the measured electrical energy with the expected electrical energy of the PV system.