The component that powers lights, doors, and controls when the main system is offline is the:

The component that powers lights, doors, and controls when the main system is offline is the:

• A. Inverter
• B. Battery system
• C. AC traction motor
• D. Multimeters

Answer: (B)

When the main system is offline, essential functions like lights, door actuation, and control circuits still need a power source. The onboard battery system provides that backup energy directly in the vehicle, delivering DC power to these subsystems without relying on the main traction supply. An inverter would only be needed to convert DC from batteries to AC for loads that require AC power, but the components mentioned (lights, doors, controls) are typically designed to run on DC from the battery system, so the battery is the primary backup source. The AC traction motor is for propulsion and wouldn’t supply these passenger-oriented systems when power is out. Multimeters are measurement tools, not power sources.

When the main system is offline, essential functions like lights, door actuation, and control circuits still need a power source. The onboard battery system provides that backup energy directly in the vehicle, delivering DC power to these subsystems without relying on the main traction supply.

An inverter would only be needed to convert DC from batteries to AC for loads that require AC power, but the components mentioned (lights, doors, controls) are typically designed to run on DC from the battery system, so the battery is the primary backup source. The AC traction motor is for propulsion and wouldn’t supply these passenger-oriented systems when power is out. Multimeters are measurement tools, not power sources.