What is the minimum battery voltage to avoid using external power?

• A. 20 volts
• B. 22 volts
• C. 24 volts
• D. 18 volts

Answer: (B)

To operate the system without relying on external power, the minimum battery voltage required is 22 volts. This threshold ensures that all essential systems can function correctly and safely. Insufficient voltage can lead to performance issues, insufficient power for avionics or other critical systems, and may also result in an inability to start the aircraft.

Maintaining a minimum battery voltage is crucial for safe operation; thus, adherence to this specification allows pilots and operators to have reliable performance and ensure safety during flights. Understanding and monitoring battery voltage is fundamental for flight operations, as it influences the aircraft's readiness and reliability.