本技术规范的目的是定义一个程序，用于测量和分析特定光伏系统的能量生产，与测试利益相关者定义的实际天气条件下相同系统的预期电能生产相关。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。

The objective of this Technical Specification is to define a procedure for measuring and analysing 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.