According to Fortune Business Insights™, the global aircraft auxiliary power unit (APU) market size was valued at USD 5.71 billion in 2024. The market is projected to grow from USD 6.11 billion in 2025 to USD 12.48 billion by 2032, exhibiting a CAGR of 10.75% during the forecast period.
An Auxiliary Power Unit (APU) is a small gas turbine engine installed primarily in the tail section of an aircraft. It provides independent power for onboard systems such as air conditioning, electrical supply, and engine starters when the main engines are not operational. It is critical in ensuring aircraft ground autonomy and acts as an emergency backup system.
The growing demand for fuel efficiency, regulatory compliance, and maintenance optimization has pushed manufacturers to develop advanced APUs using electric power systems, lightweight composites, and IoT-based predictive maintenance solutions. The increasing adoption of hybrid and electric aircraft platforms further accelerates this market’s evolution.