The single-phase EV charger with undervoltage protection stops low-voltage damage before it can start. It watches the incoming voltage in real time and stops charging as soon as the level drops below safe limits, shielding both charger and vehicle from defects or shortened life. Shenzhen Green Ocean New Energys units include these certified under-voltage circuits, so they run steadily even on shaky grids. Add in overcurrent and over-voltage guards, and users get a full safety shield every time they plug in.