The Ultimate Guide to Ground Power Units for Aircraft

Ground power units, or GPUs are some of the most important ground support equipment available for aircraft. They are necessary for aircraft maintenance and operation while parked. GPUs provide the power required to turn onboard systems on and off during routine checks, maintenance, and engine starting operations.

Why Are Ground Power Units Important?

Aircraft ground power units are an essential component in aircraft operations. They are used when it is not feasible to use onboard power systems, like an auxiliary power unit. While you could use an onboard power system when the aircraft is parked, there’s no reason to waste fuel and other resources in the process. Using ground power units can help conserve aircraft resources and extend their lifespan.

• Maintenance and Repairs for Aircraft

Aviation ground power units provide the necessary power to perform essential maintenance and repairs without draining the aircraft's battery. 

They are used during rest periods, keeping the onboard systems such as lights, air conditioning, and avionics powered. This is essential for ensuring the safety and comfort of both passengers and crew. 

Aircraft consume excessive fuel and face additional wear and tear when their power systems are used for tasks while parked. This costly and inefficient process is addressed by using a ground power unit.

• Preflight Operations

Preflight operations are essential in ensuring the safety of an aircraft before it takes off. A ground power unit supplies the necessary power to run various systems during preflight checks, ensuring that all systems function properly and allowing for a safe, successful takeoff.

• Emergency Backup

In an emergency, a ground power unit can provide an alternate power source to run essential aircraft systems when an APU is not available. A ground power unit can provide critical power to safety and navigation systems in the cockpit and other important functions. A ground power unit can also be a reliable power source through its high-performance capabilities in times of need.

Different Types of Ground Power Units

Different sources like gas, diesel, electricity, and batteries can be used to power ground power units, and aircraft ground power units have different applications. When purchasing a ground power unit, you must ensure it suits your specific and unique needs. 

• Hangar-Powered GPUs

Hangar-powered ground power units are stationary units hardwired into the electrical system of the hangar or terminal. 

These units provide powerful energy to various aircraft, allowing for efficient and cost-effective operations. These types of GPUs have an immense capacity to generate power in large volumes. A hangar-powered GPU is an excellent tool for maintenance in a hangar, allowing multiple aircraft to receive power simultaneously.

• Diesel or Gas Engine GPUs

Gas or diesel engine ground power units are great solutions for those looking for portability and versatility. They are mobile, self-contained units powered by internal combustion engines that run on either diesel or gasoline. This helps with ensuring that they can be relocated to any part of the airport or airfield when needed, making them incredibly versatile. 

These GPUs need proper fuel and can produce exhaust fumes, which could be a possible cause of concern in certain scenarios. However, the newer generation of diesel aviation ground power units have modern engines designed to reduce emissions.

Auto hoist power units

• Portable or Battery-Powered GPUs

Portable GPUs can be easily moved around, even onto an aircraft if necessary. They are powered by batteries, providing a reliable energy source for various applications. These ground power units are used for smaller aircraft or situations requiring only a minimal amount of power. The main drawback is the battery's capacity.

Investing in High-Quality Ground Power Units

Ground power unit quality and maintenance are paramount for various reasons, including safety and efficiency. Poorly maintained or low-quality aviation ground power units can lead to significant issues such as longer turnarounds, increased fuel costs, and even engine failure. 

As such, aviation operations and ground service personnel must prioritize maintaining and selecting ground power units to ensure optimal performance.

• Reliable Operations

Poorly maintained ground power units can fail to deliver the necessary power when required. This results in delays and other issues that can severely impact business operations. Investing in a reliable ground power unit is important for businesses looking to ensure consistent and reliable system performance.

• Aircraft Protection and Lifespan

A high-quality ground power unit is designed to provide stable, clean power that meets the specific requirements of aircraft systems. Using a substandard ground power unit may result in power supply instability. 

These units may not adequately meet the necessary aircraft requirements, which can be potentially hazardous and damaging to aircraft systems. Unnecessary repairs and downtime caused due to this could be financially draining.

Without proper maintenance and quality control, poorly maintained ground power units could potentially reduce the lifespan of the aircraft. Irregular or unclean power supply could lead to excessive strain on the electrical and electronic components in the aircraft. This will reduce its performance and lifespan. 

• Safety

Reliable, high-quality ground power units are essential not only for efficient operations but also for safety. A low-quality or poorly maintained ground power unit can fail to meet safety standards. This leads to risks of electrical fires, equipment damage, or other serious safety hazards.

• Cost-Effectiveness

Investing in high-quality ground power units is a costly endeavor. However, it can be advantageous for you in the long run. Such units will provide cost-effectiveness over the long term. 

Opting for a lower-quality ground power unit can be a costly mistake because they often need repairs or replacements. Poor power quality can also result in expensive damage to aircraft systems, as well as unexpected delays. 

Where to Get a Ground Power Unit

When looking for an aviation ground power unit, you must find a supplier to help you make the right decision. That’s where Pilot John International’s experts come in handy. We guide our clients through the process so they can make sure they get the type of ground power units they need. Additionally, we offer a wide variety of GPU options and offer international shipping.