GB/T 4 2847.2 - 2023 "Reversible Mode Fuel Cell Modules for Energy Storage Systems, Part 2: Reversible Mode Proton Exchange Membrane Single Cell and Stack Performance Test Methods" specifies the performance test methods for proton exchange membrane single cells and stacks in fuel cell mode, electrolysis mode and reversible mode. The standard covers test components, test systems, instrumentation, Measuring methods and test procedures, including current-voltage characteristic test, steady-state test, durability test, etc. The standard is under the jurisdiction of the China Electrical Appliance Industry Association, and the National Fuel Cell and Flow Cell Standardization Technical Committee is responsible for technical coordination. It was released on August 6, 2023 and officially implemented on March 1, 2024.