Auxiliary Power Unit – A20K
A20K / ONBOARD AUXILIARY POWER Auxiliary Power Unit – A20K
The Auxiliary Power Unit – A20K is an onboard power generation system developed to maintain mission-critical military vehicle systems when the main engine is switched off or unavailable. Integrated into the vehicle architecture, it supports electrical, pneumatic and hydraulic subsystems, onboard climate control and sustained operational readiness under demanding mission conditions.
Integrated auxiliary power platform for main-engine-off operation, co-generation, silent-mode support and mission-system continuity.
Independent Onboard Power for Mission-Critical Systems
The Auxiliary Power Unit – A20K provides power to vehicle subsystems without requiring continuous operation of the main engine. It supports pre-mission activities such as weapon and system testing, vehicle diagnostics and main-engine cooling, while helping selected systems remain operational when the primary engine is damaged or unavailable.
The system also provides autonomous onboard power for operations where fixed external power infrastructure is not available.
Integration Across Ground, Stationary and Airborne Platforms
The A20K is intended for tracked and wheeled armored vehicles, stationary systems and airborne platforms. Supplied examples include main battle tanks, self-propelled artillery systems, armored and infantry fighting vehicles, armored personnel carriers, MRAP vehicles, tactical and support vehicles, rocket systems, shelters, tents, helicopters and aircraft.
Depending on platform design and mission requirements, the unit can be installed within a sound-insulated internal compartment or mounted externally to address thermal-management and acoustic requirements.
Power24
kVA
Power Architecture for High-Demand Mission Equipment
The broader APU architecture described in the supplied information supports configurations from 2 kW to 20 kW and provides 24/28 VDC as well as higher AC and DC voltage options. The A20K technical table itself specifies 24 kVA continuous power.
The system is integrated with vehicle fuel and control architecture and draws fuel directly from the vehicle fuel tank without requiring a separate fuel tank or battery. Depending on application requirements, air-cooled or liquid-cooled diesel architectures may be configured; the A20K technical table specifically lists Water Cooled.
A20K Auxiliary Power Features
Main-Engine-Off Power
The A20K supports selected vehicle systems without requiring the main engine to remain operational.
Autonomous Onboard Supply
The system supports missions where fixed external power infrastructure is unavailable.
Co-Generation Capability
The APU can monitor onboard demand and supplement the vehicle's main generator when additional power is required.
Vehicle Fuel Integration
Fuel is drawn directly from the vehicle fuel tank without requiring a separate APU fuel reservoir.
Automatic & Manual Start
The electronic control system supports automatic and manual starting for different mission profiles.
Real-Time Monitoring
The digital control interface provides operational parameters and fault-condition information to the operator.
Electrical, Cooling and Control Configuration
Electrical Output
- Output Voltage
- 28 VDC.
- Continuous Power
- 24 kVA.
- Maximum Ampere
- 220 A.
Vehicle Integration
- Fuel Source
- Vehicle fuel tank.
- Dedicated Tank / Battery
- Not required according to the supplied product information.
- Cooling
- Water Cooled according to the A20K technical table.
Control & Monitoring
- Electronic Control Unit
- IP67-rated ECU with digital display.
- Start Modes
- Automatic and manual.
- Displayed Data
- Temperature, fuel level, pressure, DC current, battery voltage and fault conditions.
Operational Applications
Auxiliary Support for Vehicle Electronics and Mission Equipment
The A20K can supply onboard electronics, hydraulic and pneumatic systems, climate-control units, weapon systems, communication equipment, fire suppression systems, power distribution units and KBRN systems independently of continuous main-engine operation.
Its co-generation mode enables the APU to operate alongside the primary generator, continuously monitor electrical demand and compensate for power deficits when additional mission equipment increases onboard loads.
Environmental, EMC, Electrical and Reliability References
The supplied product information states that the A20K is designed and tested in accordance with the following military standards for electromagnetic compatibility, environmental performance, electrical power and reliability considerations.
Frequently Asked Questions
01What continuous power and output voltage are specified for the A20K?
The technical table specifies 24 kVA continuous power and 28 VDC output voltage.
02What maximum current is listed for the A20K?
The supplied technical data lists a maximum current of 220 A.
03What temperature ranges are specified for operation and storage?
The operating range is -32°C ~ +55°C, while the storage range is -40°C ~ +60°C.
04What noise level and system weight are specified?
The technical table lists 85 dB @ 7 m and a system weight of 350 kg ±5.
05What dimensions and fuel consumption are listed for the A20K?
The supplied data specifies 3190 × 1190 × 875 mm ±5 dimensions and 7.8 L/H fuel consumption.
Technical Data
Need More Information About the Auxiliary Power Unit – A20K?
Contact our team for A20K vehicle integration, auxiliary power, cooling and mission-system requirements.