The grid-connected cabinet can deal with and monitor the electric energy of the system to make it meet the power grid's requirements in voltage, frequency, phase, and other matching parameters, as well as provide protection functions to prevent faults from causing damage to the. . The grid-connected cabinet can deal with and monitor the electric energy of the system to make it meet the power grid's requirements in voltage, frequency, phase, and other matching parameters, as well as provide protection functions to prevent faults from causing damage to the. . Then, when the equipment needs to be connected to the power grid, an equipment " grid-connected cabinet " must be installed. They can be widely used in farms, animal husbandry, hotels, schools. . The grid-connected cabinet is a device used in the power system to connect power generation equipment (such as solar power generation, wind power generation or other types of generators) to the grid. It is connected in series between the grid-connected inverter and the energy storage cabinet. It enhances grid reliability, providing essential backup power. .