In a standby network power supply, what component comes online to convert the battery voltage to alternating current?

In a standby network power supply, the component responsible for converting battery voltage to alternating current is the battery-powered inverter. An inverter takes the direct current (DC) stored in the battery and converts it into alternating current (AC), which is the form of electricity most devices operate on.

In typical scenarios, when the main power supply fails or drops below a specific level, the inverter quickly activates to provide a seamless supply of power using the stored energy from the battery. This process is crucial for maintaining the operation of connected equipment without interruption.

The other options do not serve this specific function. For example, a surge protector is designed to protect electrical devices from voltage spikes but does not convert power types. A voltage stabilizer regulates the output voltage to maintain it within a certain range, but it does not provide conversion from DC to AC. Lastly, a transformer is used to step voltage levels up or down in AC circuits, not to convert between DC and AC.