POWER SUPPLY SYSTEM, PARALLEL SOCKET, AND METHOD FOR CONTROLLING POWER SUPPLY SYSTEM

Provided is a power supply system. An all-in-one energy storage unit is connected to a grid-connected receptacle and an off-grid receptacle of a parallel socket. The parallel socket is connected to a fuel-powered generator. A bypass switch is connected between the grid-connected receptacle and the off-grid receptacle. When the power supply system is in an off-grid state and meets a load demand, the bypass switch is switched off; otherwise, the fuel-powered generator is controlled to start, and the bypass switch is switched on.