What is a Ground Power Unit?

A Ground Power Unit (GPU) is an advanced power conversion system designed to supply stable and reliable electrical energy to aircraft and ground support equipment during ground operations. Instead of relying on onboard auxiliary power units, GPUs provide a more efficient, cost-effective and environmentally friendly power source. Mak Plus Power Systems’ GPU solutions convert standard 480 VAC input (45–65 Hz) into precise 400Hz output, ensuring full compatibility with modern aviation systems. Engineered for high performance, the system delivers stable voltage, accurate frequency control and low harmonic distortion even under dynamic and demanding load conditions.

• Provides stable 400Hz power for aircraft systems
• Reduces fuel consumption and operational costs
• Ensures safe and reliable ground operation
• Protects sensitive avionics and electrical equipment
  
• Designed for continuous use in harsh environments

GROUND POWER UNIT

Key Features

Core features engineered for high-performance 400Hz ground power applications in aviation and critical environments.​

High Precision 400Hz Output

Ensures stable and accurate frequency output (320–480 Hz adjustable) for reliable aircraft system operation.
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AC & DC Output Capability

Supports both 400Hz AC and 270V DC output options for versatile aviation and ground support applications.
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Low Harmonic Distortion

Delivers clean and stable power with THD ≤3%, minimizing electrical noise and ensuring reliable operation of sensitive avionics systems.

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High Efficiency Performance

Delivers efficiency levels of ≥90%, minimizing energy losses while improving overall system performance and reducing long-term operational costs.​

Flexible Power Range  

Available from 90 kVA to 180 kVA, offering scalable solutions for different aircraft and ground operation requirements.
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Mobile & Industrial Design

Robust, towable structure designed for outdoor use, ensuring durability and continuous operation in harsh environments.
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Why Use a Ground Power Unit (GPU)?

During ground operations, aircraft require a stable and reliable external power source to operate onboard systems without relying on internal auxiliary power units. Ground Power Units (GPUs) provide a cost-effective, energy-efficient and environmentally friendly solution by delivering precise 400Hz power directly from the ground. By supplying clean and controlled electrical energy, GPUs protect sensitive avionics, reduce fuel consumption, minimize noise emissions and ensure safe, uninterrupted ground operations in airports, hangars and maintenance facilities.

Reliable 400Hz Ground Power | Low Harmonic Distortion | Built for Continuous Aviation Operations

Applications

• Aircraft ground power supply systems
  
• Airport ground handling operations
  
• Aircraft hangars and maintenance facilities
  
• Fixed and mobile ground power stations
  
• Military airbases and defense aviation systems
  
• Helicopter ground support applications

• Civil and commercial aviation operations
  
• MRO (Maintenance, Repair & Overhaul) facilities
  
• Aircraft testing and commissioning systems
  
• Ground support equipment (GSE) integration
  
• Avionics testing and calibration environments
  
• Remote and temporary airport power solutions

TECHNICAL SPECIFICATIONS

Detailed technical specifications of Mak Plus Power Systems Ground Power Units, engineered for reliable 400Hz power supply in aviation and ground support applications.

Parameter	Specification
Power Range	90 – 180 kVA
Input Voltage	480 VAC ±10%
Input Frequency	​45 – 65 Hz
Output Voltage (AC)	115 / 200 VAC
Output Frequency	400 Hz (320 – 480 adjustable)
DC Output Voltage	270 VDC
DC Output Current	Up to 300 A
Phase	Three Phase
THD	≤ 3%
Efficiency	≥ 90%
Overload Capacity	Up to 200% (short duration)
Control System	7” Touch Screen HMI
Communication	RS485 / MODBUS
Cooling System	Forced Air Cooling
Noise Level	< 65 dB
Protection Class	IP54
Operating Temperature	-10°C to +45°C

*Specifications may vary depending on project requirements and customization options.

Ground Power Units Technical Datasheets

Download Technical Datasheet

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ground_power_unit.pdf
File Size:	3398 kb
File Type:	pdf

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gpu-ger_100kva_ground_power_unit1.pdf
File Size:	335 kb
File Type:	pdf

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gpu-ger_140kva_ground_power_unit1.pdf
File Size:	313 kb
File Type:	pdf

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gpu-ger_180kva_ground_power_unit1.pdf
File Size:	332 kb
File Type:	pdf

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Why Mak Plus Power Systems?

Mak Plus Power Systems is a trusted manufacturer of advanced ground power solutions, delivering high-performance 400Hz Ground Power Units (GPU) for aviation and critical applications worldwide. Combining German engineering standards with modern power electronics, our systems ensure exceptional reliability, precision and long-term operational stability.

We specialize in designing and manufacturing GPU systems that provide stable 400Hz power and optional 270V DC output for aircraft and ground support equipment, meeting the demanding requirements of airports, maintenance facilities, military bases and aviation infrastructure where power quality and uninterrupted operation are essential.

​With flexible configurations ranging from 90 kVA to 180 kVA, we offer scalable and fully customizable solutions tailored to specific project needs, designed for continuous operation, low harmonic distortion and high efficiency. From mobile towable units to fully integrated ground power systems, Mak Plus Power Systems delivers reliable and future-ready solutions that enhance operational efficiency, reduce costs and support sustainable aviation operations.

Contact Our Engineering Team

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