本推荐规程侧重于电压等级为10kV及以下的光伏储能充电站应用场景中电能存储（EES）系统的性能测试。关键性能指标的测试方法和程序，如储能容量、往返效率（RTE）、响应时间（RT）、爬坡率（RR）和参考信号跟踪，根据EES系统运行特性得出的占空比进行定义。

This recommended practice focuses on the performance test of the electrical energy storage (EES) system in the application scenario of PV-storage-charging stations with voltage levels of 10 kV and below. The test methods and procedures of key performance indexes, such as the stored energy capacity, the roundtrip efficiency (RTE), the response time (RT ), the ramp rate (RR), and the reference signal tracking are defined based on the duty cycle derived from the operational characteristics of the EES system.