This report describes development of an effort to assess Battery Energy Storage System (BESS) performance that the U. Department of Energy (DOE) Federal Energy Management Program (FEMP) and others can employ to evaluate performance of deployed BESS or solar photovoltaic . This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www. The. ficant need for standards. Energy storage systems must adhere to various GB/T standards, which ensure the safety, performance, and e the optimal size and location of PVCSs. Solar-storage-charging has seen a. For renewable system integrators, EPCs, and storage investors, a well-specified energy storage cabinet (also known as a battery cabinet or lithium battery cabinet) is the backbone of a reliable energy storage system (ESS). Walker, Andy, Jal Desai, Thushara Gunda, and Nicole Jackson. Operation and Maintenance of PV Systems: Data Science, Analysis, and Standards. Golden, CO: National Renewable.