Aircraft Ground Power Units (GPUs)

Ground Power Units (GPUs) are the unsung workhorses of aviation operations, delivering critical electrical power to aircraft when they’re parked at gates, on tarmacs, or in hangars—and selecting the right GPU isn’t just a purchase decision; it’s an investment in reducing downtime, cutting fuel costs, and ensuring seamless passenger and crew experiences. For airport managers, maintenance teams, and aviation operators, choosing a subpar GPU can lead to costly equipment damage, unexpected delays, and long-term operational headaches. That’s why this guide is designed to break down everything you need to know about Aircraft Ground Power Units: from what they are and why planes can’t function without them, to how to compare types, avoid common mistakes, and select a GPU that aligns with your fleet, budget, and environmental goals. By the end, you’ll not only understand why Ground Power Units are non-negotiable for modern aviation but also have the tools to pick a unit that delivers long-term value—including insights into trusted solutions like Haisen’s industry-leading GPUs, built to solve the exact pain points aviation professionals face daily.

Understanding Aircraft Ground Power Units: What They Are and Why They’re Non-Negotiable

Before diving into how to choose a GPU, it’s critical to first grasp what Aircraft Ground Power Units are and why they’re indispensable to ground operations. Too many operators rush into purchases without fully understanding a GPU’s role, leading to mismatched units that fail to meet needs or break down prematurely. Let’s start with the basics to build a foundation for smart decision-making.

Defining Aircraft Ground Power Units (GPUs): The Backbone of Ground Operations

At their core, Aircraft Ground Power Units (GPUs) are external electrical systems designed to supply stable, consistent power to aircraft while their main engines are off. Unlike onboard power sources (like Auxiliary Power Units, or APUs), Ground Power Units are standalone devices that connect to an aircraft via specialized cables, delivering the exact voltage and frequency needed to keep critical systems running.

Ground Power Units come in various forms—portable carts for small private planes, stationary units for busy airport gates, and mobile units for tarmac or hangar use—but all serve the same core purpose: to eliminate reliance on an aircraft’s own battery or fuel reserves during ground operations. For aviation operators, this means protecting onboard systems from unnecessary wear, reducing fuel consumption (since engines don’t need to run to generate power), and ensuring that every phase of ground operations—from pre-flight checks to passenger boarding—runs smoothly.

Without reliable Ground Power Units, airports and maintenance facilities would struggle to maintain schedules. Imagine a commercial jet arriving at a gate: its engines shut down, and without a GPU, the cabin’s air conditioning would fail, leaving passengers sweltering or shivering. Cockpit avionics (critical for pre-flight planning) would go dark, and fueling operations (which require power for safety systems) would grind to a halt. In short, Ground Power Units are the backbone of efficient, safe, and passenger-friendly ground operations—and choosing the right one is the first step to avoiding these costly disruptions.

Why Do Planes Need Ground Power Units? Avoiding Delays, Damage, and Discomfort

The question “Why do planes need Ground Power Units?” has a simple answer: to keep operations moving when engines are off. But the consequences of skipping a GPU go far beyond minor inconveniences—they can lead to expensive damage, missed flights, and unhappy customers. Let’s break down the key reasons Ground Power Units are non-negotiable:

• Preserving Onboard Battery and Fuel Reserves: Aircraft batteries are designed for short-term use (e.g., starting engines), not prolonged power supply for lighting, avionics, or climate control. Using a battery to power these systems during a 2-hour layover would drain it completely, leaving the plane unable to start its engines—a delay that could cost airlines thousands in missed departure times. Similarly, running main engines to generate power wastes fuel (a single commercial jet burns hundreds of gallons per hour at idle) and increases maintenance costs (engine wear accumulates even when parked). Ground Power Units eliminate both issues by supplying external power, saving fuel and protecting batteries.
• Ensuring Stable Power for Sensitive Systems: Onboard generators (powered by engines or APUs) can sometimes produce voltage fluctuations, which are risky for sensitive avionics, navigation systems, and cabin electronics. Ground Power Units are engineered to deliver consistent, clean power, reducing the risk of electrical damage to expensive aircraft components. For maintenance teams, this stability is even more critical: during extended checks or repairs, systems like diagnostic tools and fuel sensors rely on steady power to function accurately. A faulty GPU with unstable output could lead to misdiagnoses or equipment failure—costly mistakes that Ground Power Units help avoid.
• Preventing Passenger and Crew Discomfort: Imagine boarding a plane on a 100°F day with no air conditioning, or deplaning in a snowstorm with no heat. Without Ground Power Units, cabin climate control systems shut down when engines are off, leading to uncomfortable (and sometimes unsafe) conditions. Ground Power Units keep these systems running, ensuring passengers and crew stay comfortable during boarding, deplaning, and layovers. Happy passengers mean fewer complaints, better brand reputation, and repeat business—all of which depend on reliable Ground Power Units.
• Supporting Critical Pre-Flight and Post-Flight Tasks: Pre-flight checks require power for cockpit instruments, communication systems, and navigation tools. Post-flight tasks like cleaning, restocking, and waste removal need lighting and power for equipment. Ground Power Units supply the energy needed for all these tasks, ensuring planes are ready for their next flight on time. Without a GPU, these tasks would take longer or be impossible—leading to delays that ripple through an entire airport’s schedule.

In short, Ground Power Units aren’t just “nice to have”—they’re essential for avoiding delays, protecting expensive equipment, and keeping passengers and crew safe. For operators looking to cut costs and improve efficiency, investing in the right GPU is one of the most impactful decisions they can make.

What Does a GPU Do for a Plane? Beyond Basic Power Supply？

While the core function of Ground Power Units is to supply electricity, their role extends far beyond “keeping the lights on.” A high-quality GPU supports nearly every aspect of ground operations, making it a versatile tool for aviation professionals. Let’s explore the full range of what a GPU does for a plane:

• Powering Pre-Flight Checks: Before takeoff, pilots and maintenance teams need to test avionics, navigation systems, communication tools, and flight controls—all of which require power. Ground Power Units supply the steady voltage needed for these checks, ensuring that every system is functioning correctly before the plane departs. A faulty GPU could lead to incomplete checks, increasing the risk of in-flight issues.
• Maintaining Cabin Climate Control: As mentioned earlier, Ground Power Units keep heating, ventilation, and air conditioning (HVAC) systems running during ground operations. This isn’t just about comfort: in extreme temperatures, HVAC failure can damage cabin materials or even pose health risks to passengers with medical conditions. Ground Power Units ensure that cabin temperatures stay within safe, comfortable ranges, no matter the weather outside.
• Enabling Fueling and Refueling Operations: Fueling a plane requires power for safety systems (e.g., fuel level sensors, emergency shutoffs) and equipment (e.g., fuel pumps). Ground Power Units supply this power, allowing fueling teams to work efficiently and safely. Without a GPU, fueling would have to rely on the aircraft’s battery—risking drainage and delays.
• Supporting Maintenance and Repairs: During maintenance, Ground Power Units power diagnostic tools, lighting for inspecting engines or fuselage, and systems like hydraulic pumps (used to test landing gear). For extended repairs (e.g., replacing avionics), a GPU provides continuous power without draining the aircraft’s battery or running the APU. This not only speeds up maintenance but also reduces wear on onboard systems.
• Supplying Pneumatic Pressure (in Some Models): Advanced Ground Power Units (often called “combined GPUs”) can also provide pneumatic pressure, which is used to start auxiliary systems (like APUs) or flush waste tanks before departure. This eliminates the need for separate pneumatic equipment, streamlining operations and reducing the number of devices needed on the tarmac.
• Powering Post-Flight Services: After landing, planes need power for cleaning crews (vacuums, lights), restocking teams (refrigeration for food and drinks), and waste removal (vacuum systems for toilets). Ground Power Units keep these services running, ensuring the plane is ready for its next flight quickly.

In essence, a GPU is a multi-purpose tool that keeps every part of ground operations moving. For operators, this means that choosing the right Ground Power Unit isn’t just about selecting a power source—it’s about investing in a device that supports efficiency, safety, and productivity across all ground tasks.

Ground Power Units vs. Auxiliary Power Units (APUs): Key Differences to Inform Your Choice

One of the most common mistakes aviation operators make is confusing Ground Power Units (GPUs) with Auxiliary Power Units (APUs). While both supply power to aircraft on the ground, they’re fundamentally different in design, function, and cost—and understanding these differences is critical to choosing the right solution for your operations. Let’s break down how GPUs and APUs compare, and when to prioritize one over the other.

The Core Functions: How GPUs and APUs Serve Aircraft Differently

First, let’s clarify the basic definitions:

• Ground Power Units (GPUs): External, standalone devices that connect to an aircraft via cables to supply electrical power (and sometimes pneumatic pressure) while the plane is on the ground. GPUs are owned and maintained by airports, maintenance facilities, or ground service providers—not the aircraft operator.
• Auxiliary Power Units (APUs): Small, self-contained engines located within the aircraft’s fuselage (usually in the tail). APUs generate electrical power and pneumatic pressure for the aircraft when main engines are off, and they’re owned and maintained by the aircraft operator.

The core difference lies in their location and ownership: GPUs are external, while APUs are onboard. This difference impacts nearly every aspect of their use, from cost to flexibility. Let’s compare their key functions:

For example, a busy airport gate might have a stationary electric GPU that can power a Boeing 737, Airbus A320, and Embraer E175—all by adjusting cables or settings. In contrast, each of those planes has its own APU, which can only power that specific aircraft and uses the plane’s own jet fuel to run.

Advantages of Ground Power Units Over APUs: Cost, Durability, and Flexibility

For most aviation operators, Ground Power Units offer significant advantages over APUs—especially when it comes to long-term cost savings and operational flexibility. Here’s why GPUs are often the better choice for ground operations:

• Lower Long-Term Costs: APUs are expensive to maintain. They’re small engines that run on aircraft fuel (which is costly) and require regular servicing (oil changes, filter replacements, engine overhauls). A single APU maintenance event can cost tens of thousands of dollars, and APUs typically have a lifespan of 10–15 years. Ground Power Units, by contrast, have lower maintenance costs (especially electric models) and don’t use aircraft fuel. While the upfront cost of a GPU may be higher than an APU’s annual maintenance, over time, GPUs save money by reducing fuel consumption and eliminating APU wear. For example, a commercial airline using GPUs instead of APUs for 2-hour layovers could save hundreds of gallons of fuel per plane per day—adding up to millions in annual savings.
• Greater Flexibility: Ground Power Units are designed to work with multiple aircraft models, as long as their voltage and frequency match the aircraft’s needs. This is a game-changer for airports or maintenance facilities that handle diverse fleets (e.g., a mix of private jets, regional airliners, and commercial planes). Instead of investing in a separate APU for each aircraft, operators can use a single GPU (or a small fleet of GPUs) to power all their planes. For example, Haisen’s YC160DT GPU is compatible with most commercial and regional aircraft, making it a versatile solution for busy facilities.
• Reduced Wear on Onboard Systems: Using an APU for ground power increases its wear and tear, shortening its lifespan and increasing maintenance costs. Ground Power Units eliminate this issue by providing external power, allowing the APU to be used only when necessary (e.g., during takeoff or landing, when a GPU isn’t available). This extends the APU’s life and reduces the frequency of costly repairs.
• Eco-Friendly Options: Electric and hybrid Ground Power Units produce far fewer emissions than APUs (which run on jet fuel). For airports and operators looking to meet sustainability goals (e.g., reducing carbon footprints or complying with noise regulations), electric GPUs are an ideal solution. They’re also quieter than APUs and diesel GPUs, making them suitable for airports near residential areas where noise pollution is a concern.
• Reliability in Extreme Conditions: Some Ground Power Units are engineered to perform in harsh environments—extreme heat, cold, rain, or snow—that might cause APUs to fail. For example, a diesel GPU with a heavy-duty cooling system can operate in desert climates, while an electric GPU with insulated cables can work in sub-zero temperatures. APUs, being onboard, are more susceptible to environmental damage (e.g., cold weather can thicken their oil, leading to startup failures).

When to Choose an APU Instead of a GPU: Specific Operational Scenarios

While Ground Power Units offer many advantages, there are situations where an APU is the better choice. Understanding these scenarios will help you make a balanced decision:

• Remote Locations with No GPU Infrastructure: If you’re operating in a remote area (e.g., a small airfield, a military base in a desert, or an emergency landing site) with no access to Ground Power Units, an APU is essential. It provides power when a GPU isn’t available, ensuring the aircraft can start its engines and perform critical functions.
• Short Ground Stops: For planes with very short layovers (e.g., 30 minutes or less), it may be faster to use the APU than to connect a GPU. Connecting a GPU requires time to position the unit, attach the cables, and test the power supply—time that may not be available for quick turns. In these cases, the APU’s speed outweighs the cost of fuel and wear.
• In-Flight or Takeoff/Landing Phases: GPUs are only useful when the aircraft is parked on the ground. During takeoff, landing, or in-flight emergencies (when engines fail), the APU is the only source of backup power. For this reason, all commercial aircraft are required to have an APU (or a similar backup system) by aviation regulations.
• Aircraft with Unique Power Requirements: Some specialized aircraft (e.g., military jets, cargo planes with heavy electrical loads) may have power needs that exceed the capabilities of standard Ground Power Units. In these cases, an APU (which is designed specifically for the aircraft) may be the only reliable option.

Why Understanding GPU vs. APU Matters for Long-Term Operational Success

The choice between Ground Power Units and APUs isn’t an “either/or” decision—it’s about using each tool in the right scenario to maximize efficiency and minimize costs. For most operators, the optimal strategy is to use Ground Power Units for most ground operations (e.g., layovers, maintenance, boarding) and reserve APUs for situations where a GPU isn’t available (e.g., remote locations, short stops).

By prioritizing Ground Power Units, you’ll reduce fuel costs, extend the life of your APUs, and gain flexibility to handle diverse aircraft. This is especially true for operators with large fleets or busy facilities, where the savings from GPUs can be substantial. For example, a major airport that switches from APUs to GPUs for 80% of its ground operations could reduce its annual fuel consumption by 10–15% and cut APU maintenance costs by 20–25%.

For operators looking to implement this strategy, the next step is to choose the right type of Ground Power Unit—a decision that depends on your aircraft, environment, and operational needs.

How to Select the Right Type of Ground Power Unit: Aligning with Your Aircraft and Environment

Choosing between diesel, electric, and hybrid Ground Power Units depends on three key factors: your aircraft’s needs, your operational environment, and your budget. Here’s a step-by-step guide to help you decide:

Assess Your Aircraft’s Power Requirements:

• First, determine the voltage (115V, 200V) and frequency (50 Hz, 400 Hz) your aircraft need. Most commercial jets use 200V/400 Hz, while small private planes may use 115V/50 Hz.
• Next, calculate the electrical load: large commercial jets require 90–120 kVA, regional airliners 40–90 kVA, and private planes 10–40 kVA.
• If your fleet includes large aircraft with high loads, diesel or hybrid GPUs are better. For small to medium aircraft, electric or hybrid GPUs work well.

Evaluate Your Operational Environment:

• Grid Access: Do you have a stable electrical grid? If yes, electric or hybrid (with grid connection) GPUs are ideal. If no, diesel or hybrid (with battery) GPUs are better.
• Weather Conditions: Extreme heat or cold? Diesel GPUs are more durable in harsh weather, but electric GPUs with insulated components can also work. Battery-powered electric GPUs may struggle in cold weather.
• Noise and Emissions Regulations: Are you in an area with strict noise or emissions rules? Electric or hybrid (electric mode) GPUs are the best choice.

Balance Upfront Cost with Long-Term Savings:

• Electric GPUs have lower upfront costs than diesel or hybrid but require grid access.
• Diesel GPUs have lower upfront costs than hybrid but higher fuel and maintenance costs.
• Hybrid GPUs have higher upfront costs but offer the most flexibility and long-term savings.

Consider Future Growth:

• If you plan to expand your fleet (e.g., add large commercial jets), choose a GPU that can handle higher loads (e.g., diesel or hybrid).
• If you plan to adopt sustainability goals (e.g., net-zero emissions), electric or hybrid GPUs are future-proof.

By following these steps, you’ll narrow down the type of Ground Power Unit that fits your needs. For example, if you operate a small airfield with private jets and a stable grid, an electric GPU is ideal. If you run a remote military base with large cargo planes, a diesel GPU is better. If you manage a busy maintenance facility with diverse aircraft, a hybrid GPU is the way to go.

Environmental and Operational Settings: Weather, Usage Frequency, and Location

The environment in which you use your Ground Power Unit has a huge impact on its performance and lifespan. A GPU that works well in a mild climate may fail in extreme heat or cold, while a GPU designed for occasional use may break down in a busy airport. Here’s how to align your GPU with your environment:

• Weather Conditions:
• Extreme Heat (100°F+): Choose a GPU with a heavy-duty cooling system (e.g., diesel GPUs with dual fans, electric GPUs with heat-resistant cables). Haisen’s GPUs, for example, have aluminum heat sinks that prevent overheating in high temperatures.
• Extreme Cold (-20°F+): Look for GPUs with insulated cables, cold-weather lubricants (for diesel models), and battery heaters (for electric models). Avoid battery-powered electric GPUs in cold weather, as their runtime will drop by 30–50%.
• Rain/Snow/Humidity: Choose a GPU with an IP rating of IP54 or higher (IP54 means it’s protected against dust and water splashes). IP65 is even better (protected against heavy rain and dust). Avoid GPUs with exposed electrical components, as they can short-circuit in wet conditions.
• Usage Frequency:
• High-Frequency Use (8+ hours/day): Choose a durable GPU with a heavy-duty frame and components. Electric GPUs are ideal here, as they have fewer moving parts and can handle continuous use. Haisen’s stationary electric GPUs, for example, are designed for 24/7 operation.
• Low-Frequency Use (1–2 hours/day): A portable GPU (electric or diesel) is sufficient. Battery-powered electric GPUs are a good choice here, as they’re easy to store and don’t require regular fueling.
• Location:
• Airport Gates: Stationary electric or hybrid GPUs are best, as they’re connected to the grid and can handle frequent use. They should also be quiet (to avoid disturbing passengers) and have a small footprint (to save space).
• Tarmacs/Hangars: Mobile diesel or hybrid GPUs are ideal, as they can be moved to different aircraft. They should have rugged tires (for tarmacs) and easy-to-use controls (for quick setup).
• Remote Locations: Diesel or hybrid (battery) GPUs are best, as they don’t rely on the grid. They should be lightweight (for transport) and have a long fuel/battery runtime (6+ hours).
• Noise Restrictions:
• If you’re in an area with noise limits (e.g., airports near residential areas), choose an electric GPU (under 60 decibels) or a hybrid GPU in electric mode. Diesel GPUs are too loud for these settings (80+ decibels).

Reliability and Maintenance: Minimizing Downtime with Durable Ground Power Units

A GPU that breaks down is worse than no GPU at all—it leads to delays, missed flights, and frustrated customers. To ensure your GPU is reliable, you need to choose a durable model and implement a regular maintenance schedule. Here’s how:

• Choose a GPU with High-Quality Components:
• Look for GPUs with:
• Heavy-duty frames (steel or aluminum) to withstand bumps and impacts on the tarmac.
• High-quality cables (copper, not aluminum) that resist wear and tear.
• Brand-name engines (for diesel models: Caterpillar, Cummins) and alternators (for electric models: Siemens, ABB) that are known for reliability.
• Reputable brands like Haisen use only top-tier components, so their GPUs have a failure rate 50% lower than generic models.
• Check for Safety Features:
• Safety features not only protect your aircraft and operators but also prevent GPU damage. Look for:
• Overvoltage/overcurrent protection: Shuts down the GPU if voltage or current spikes, preventing damage to the aircraft.
• Short-circuit protection: Prevents electrical fires if the cable is damaged.
• Emergency stop buttons: Allows operators to shut down the GPU quickly in case of an emergency.
• Temperature sensors: Alerts operators if the GPU is overheating, preventing engine damage (for diesel models).
• Implement a Regular Maintenance Schedule:
• Even the most durable GPU needs maintenance. Follow the manufacturer’s schedule, which should include:
• Daily Checks: Inspect cables for damage, check fluid levels (diesel models), and test power output.
• Monthly Checks: Clean filters (air, fuel, oil for diesel models), tighten connections, and test safety features.
• Annual Service: Replace worn parts (cables, filters), perform engine tune-ups (diesel models), and update software (electric models).
• Many manufacturers like Haisen offer maintenance contracts, where their technicians perform these checks for you—saving you time and ensuring the job is done right.
• Have a Backup Plan:
• Even the most reliable GPU can fail. To avoid delays, have a backup GPU (or a rental agreement with a provider like Haisen) on hand. For busy facilities, it’s recommended to have one backup GPU for every 5 operational GPUs.

Why Aviation Professionals Choose Haisen’s Ground Power Units: Quality, Service, and Value？

Aviation professionals don’t just buy Haisen’s Ground Power Units—they stay with Haisen for years. Here’s why:

• Long-Term Cost Savings:
• Haisen’s GPUs have a total cost of ownership (TCO) 30–40% lower than competitors. For example, a Haisen YC160DT diesel GPU costs $120,000 upfront but saves $15,000–$20,000 per year in fuel and maintenance costs. Over 10 years, this adds up to $150,000–$200,000 in savings.
• Haisen’s electric GPUs are even more cost-effective: a 100 kVA electric GPU saves $25,000–$30,000 per year in fuel costs compared to a diesel model.
• Unmatched Reliability:
• Haisen’s GPUs have a mean time between failures (MTBF) of 5,000+ hours—twice the industry average (2,500 hours). This means fewer breakdowns, less downtime, and more efficient operations.
• The company offers a 5-year warranty on all GPUs (twice the industry standard of 2–3 years), giving customers peace of mind.
• Flexibility and Compatibility:
• Haisen’s GPUs are compatible with 95% of commercial and regional aircraft, making them ideal for facilities with diverse fleets. The YC160DT, for example, can power a Boeing 737 in the morning and an Embraer E175 in the afternoon—no need for separate units.
• Haisen also offers custom GPUs for specialized aircraft (e.g., military jets, cargo planes), ensuring customers get a solution that fits their exact needs.
• Exceptional Customer Service:
• Haisen’s 24/7 technical support team includes aviation experts who can troubleshoot issues over the phone or via video call. If a problem can’t be solved remotely, a technician is dispatched within 24 hours (for customers in major regions).
• The company offers training programs for operators, ensuring they know how to use the GPU safely and efficiently. Training is available in-person or online, and materials are provided in 10+ languages.
• Sustainability Benefits:
• For operators looking to meet sustainability goals, Haisen’s electric and hybrid GPUs are the perfect solution. They help reduce carbon footprints, comply with emissions regulations, and improve brand reputation. For example, an airport that switches to Haisen’s electric GPUs can reduce its annual emissions by 500+ tons.

Conclusion: Making the Wise Choice in Aircraft Ground Power Units—Your Path to Efficiency and Savings

Choosing the right Aircraft Ground Power Unit (GPU) is one of the most impactful decisions you’ll make for your aviation operations. Ground Power Units aren’t just tools—they’re investments in efficiency, safety, and long-term cost savings. By understanding what GPUs are, how they differ from APUs, which type fits your needs, and which features to prioritize, you can avoid costly mistakes and select a unit that delivers value for years to come.

Let’s recap the key takeaways from this guide:

1. Ground Power Units are Non-Negotiable: They supply stable power to aircraft when engines are off, protecting onboard systems, saving fuel, and ensuring passenger comfort. Without GPUs, ground operations grind to a halt.
2. GPUs vs. APUs: Use the Right Tool for the Job: GPUs are external, cost-effective, and flexible—ideal for most ground operations. APUs are onboard, convenient for remote locations or short stops but more expensive to maintain.
3. Choose the Right Type of GPU: Diesel GPUs for high power and remote areas, electric GPUs for eco-friendliness and grid-connected sites, and hybrid GPUs for versatility.
4. Prioritize Compatibility, Environment, and TCO: Ensure your GPU matches your aircraft’s voltage/frequency/kVA, fits your weather and location, and delivers long-term savings (not just a low upfront price).
5. Look for High-Performance Features: Stable voltage/frequency, efficient cooling/heating, smart energy management, and robust safety features.

For aviation professionals looking for a trusted solution, Haisen’s Ground Power Units—like the YC160DT—check all the boxes. They’re reliable, efficient, compatible with most aircraft, and backed by exceptional customer service. With Haisen’s GPUs, you’ll reduce costs, improve efficiency, and meet sustainability goals—all while ensuring your ground operations run smoothly.

The time to invest in the right Ground Power Unit is now. Every day you use a subpar GPU, you’re wasting fuel, increasing maintenance costs, and risking delays. Contact Haisen today to get a custom quote for your Ground Power Unit needs. Their team of experts will help you select a GPU that fits your fleet, your environment, and your budget—so you can focus on what matters most: keeping your aircraft in the air and your customers satisfied.

Remember: A wise choice in Ground Power Units isn’t just a purchase—it’s a step toward a more efficient, cost-effective, and sustainable aviation operation.