The Programmable AC Load is a high-end precision testing equipment equipped with an intelligent numerical control system. It supports manual programming, intelligent program control and remote control, and can accurately set parameters such as load power, current, voltage and power factor to realize linear fine adjustment, step change and sudden change simulation of loads. With high testing accuracy and good stability, the equipment can automatically complete aging test, steady-state test, transient test, energy efficiency test and other experiments. It is widely used in R&D verification, factory quality inspection and type test of precision electrical products such as AC power supplies, inverters, charging pile modules and power adapters, and is the core equipment for high-precision laboratory detection.