What is the minimum voltage required for battery operation of the APU?

The minimum voltage required for battery operation of the APU (Auxiliary Power Unit) is 24 VDC. This voltage is essential for the proper functioning of the APU, which is designed to provide ground power for aircraft systems and to start the main engines when necessary.

Operating below this voltage could lead to inadequate power supply, affecting the performance of the APU and the systems it supports. It’s crucial to ensure that the battery voltage is maintained at or above the minimum threshold to guarantee reliable operation and prevent potential malfunctions or system failures during critical operations.

Understanding battery operation voltages in aircraft systems, particularly for auxiliary power systems, is fundamental for effective maintenance and operational readiness.