SYSTEM POWER SUPPLY

A system power supply including an input power supply, a working power supply unit, a plurality of control modules, and a wiring harness is provided. The wiring harness includes a working power supply line and an input power supply line. An input power supply port of each control module is connected to the input power supply line, and a working power supply port is connected to the working power supply line. The input power supply is connected to the input power supply line, and an output of the working power supply unit is connected to the working power supply line. The present invention uses a working power supply line to provide working power supply to a plurality of control modules, eliminating the traditional operation of configuring an independent working power supply for each control module.