Manufacturer Supplies EPS Emergency Power Supply System, which mainly includes rectifier chargers, battery packs, inverters, transfer switches, and system controllers. The inverter is the core, typically using DSP or a single-chip CPU for SPWM modulation control of the inverter section, ensuring a good AC waveform output; the rectifier charger's function is to charge the battery pack in a timely manner when the mains power is normal; the inverter's role is to convert the stored DC power from the battery pack into AC power for output when the mains power is abnormal, providing stable and continuous power to the load equipment; the transfer switch ensures