In modern commercial, military, and general aviation operations, aircraft parked on the ground require a continuous, reliable source of electrical energy. This must be achieved without relying on the aircraft's fuel-consuming Auxiliary Power Unit (APU) or main turboprop engines. For regional aircraft, business jets, turboprops, helicopters, and specific defense airframes, 28V DC (typically delivered at 28.5V DC to compensate for line voltage drops) is the standard power profile. This is crucial for pre-flight testing, starting engines, and operating cabin environmental control systems.
Historically, airports relied heavily on centralized diesel generator power loops or highly polluting GSE fleets. Today, the global aviation sector is transitioning toward decarbonization, strict emission zones, and tight noise-level limits. These shifts have led to the modernization of the 28V Ground Power Unit (GPU). Modern GPUs utilize advanced solid-state frequency conversion, high-density battery energy storage, and smart telemetry. These technologies ensure they satisfy the demanding electrical dynamics of modern airframes while maintaining a low operational footprint.
Utilizing high-frequency rectifier bridges and active front end (AFE) technologies to achieve extremely clean DC ripple characteristics. This guarantees that modern fly-by-wire computer suites and advanced avionics avoid voltage surges and premature degradation.
Integrating lithium-iron-phosphate (LiFePO4) storage arrays directly into mobile, towable chassis. This delivers silent, zero-emission output during gate maintenance cycles, dramatically lowering fuel consumption and operational costs.
Real-time microprocessor-controlled feedback loops continuously measure output cable impedance and drop factors. This allows the system to adjust dynamically, delivering exactly 28.5 volts at the aircraft plug, even under fluctuating loads.
A high-performance 28V Ground Power Unit is engineered to manage extreme current peaks during turbine starting phases. These peak currents can exceed 1500 to 2000 Amperes for brief periods. A deeper look at the core components reveals the technical layout that manufacturers utilize to guarantee power quality, flight safety, and equipment durability:
Voltage Ripple Factor
Peak Cold Cranking Capacity
Ingress Protection Standards
Galvanically Isolated Output
Aviation ground support equipment operates in diverse climates and conditions. An off-the-shelf GPU that operates reliably in a mild climate could experience thermal failure in a desert environment or battery capacity loss in extreme cold. Below, we look at the localized adaptations necessary to keep ground support operations running smoothly:
For offshore oil rig heliports and coastal naval bases, standard GPUs suffer from rapid corrosion of PCB boards and connectors. Marine localized GPUs are designed with stainless steel cabinets, military-spec anti-corrosion marine paint, and conformal-coated electrical cards to resist salt spray and continuous high relative humidity.
In high-latitude regions (e.g., Northern Europe, Alaska), temperature drops severely affect diesel engine starts and battery storage efficiencies. Localized units deploy customized engine block pre-heaters, synthetic low-viscosity fluids, and insulated battery heating blankets to guarantee smooth start-up sequences at temperatures as low as -40°C.
High temperatures combined with low air density reduce the cooling efficiency of standard heat sinks. In desert locations, GPUs are built with oversized cooling channels, high-volume air extraction fans, and specialized sand filters. This design prevents thermal shutdowns and stops abrasive dust from settling on power electronics.
As a leading supplier in the aviation sector, we manufacture and supply a comprehensive range of ground support equipment. This includes fueling trucks, pallet dollies, passenger stairs, and air conditioners. Our machinery is built to withstand heavy ramp operations while delivering maximum efficiency.
Comprises a specialized chassis, oil tanks, integrated pumping, control and operating parts, with filtration, metering, self-circulation, and pressure controls.
Equipped with state-of-the-art pumping systems and high-precision flow meters for safe and efficient fuel loading across various aircraft profiles.
Combines chassis structure and oil tanks with a sophisticated pressure control system, ensuring safe fueling under demanding airport conditions.
Reliable cargo dolly for transfer of standard palletized air freight, featuring high load capacity and smooth rolling surface rollers.
Built with robust high-grade steel to handle severe impact loads on airport aprons, ensuring long-term wear resistance.
Engineered for swift maneuvering, featuring multi-directional swivel casters ("castles") for effortless air freight alignment.
Specifically matched for standard LD3 aviation cargo containers, offering secure locking mechanisms and stable towing profiles.
A premium load capacity ground trailer designed for frequent, heavy operations across demanding terminal cargo areas.
Custom-built platform dolly supporting LD6 containers, engineered for direct compatibility with sorting and cargo lifter units.
Features weatherproof enclosures to keep baggage dry during transit under high-humidity or storm conditions.
Provides complete dust and rain protection, securing baggage from falling out during transportation across the ramp.
A lightweight passenger-handling and terminal operations trolley with a responsive braking system for passenger safety.
Engineered for large passenger planes, featuring a secure scissor-lift cabin design for stable dock-to-aircraft feeding operations.
Zero-emission flight catering solution utilizing modern high-capacity battery packs, perfect for green airport initiatives.
A highly adaptable scissor-lift catering service vehicle, designed to operate safely with various cabin door heights.
High-efficiency portable ground heater designed to pump warm air into passenger cabins in cold winter conditions.
High-performance ground cooling system that supplies fresh, pre-conditioned air to parked aircraft, reducing reliance on the onboard APU.
Designed to quickly pre-heat small to mid-sized aircraft cabins during ground turnarounds in cold weather regions.
Electrically propelled passenger boarding stairs featuring safety handrails and non-slip steps for passenger comfort.
Diesel-engine driven, durable telescopic flight stairs adjustable to a wide variety of aircraft doors.
High-reach, reliable mobile stairs featuring wind-resistant structures and automated docking safety sensors.
High-capacity battery-driven green GPU providing silent, zero-emission 28V DC and 400Hz AC power configurations.
A reliable 400Hz AC solid-state frequency converter designed for wide-body commercial aircraft terminal supply loops.
High-efficiency solid-state ground power converter offering clean current characteristics, low maintenance, and high reliability.
Delivers high-pressure air to start main aircraft jet engines, featuring a robust truck-chassis mounted design.
Mid-capacity ground pneumatic pressure unit designed for reliable engine starting on narrow-body jets.
High-pressure mobile compressor system designed for heavy commercial and cargo aircraft engine starting.
Heavy-duty pushback tractor designed to handle wide-body commercial airliners with precision and safety.
Mid-sized pushback and towing tractor featuring high torque output, perfect for narrow-body aircraft operations.
Compact, highly maneuverable tug for business jets, regional turboprops, and lighter military aircraft.
Zero-emission electric tractor designed for pulling heavy baggage dolly chains throughout terminal ramp areas.
High-drawbar-pull diesel towing tractor built for heavy cargo operations in demanding airport environments.
Powerful electric tow tractor, combining zero-emission operations with high-efficiency motor controllers.
Durable service truck equipped with corrosion-proof waste tanks and high-pressure washing systems.
Fully electric layout for servicing waste and clean water storage on aircraft without tailpipe emissions.
Advanced zero-emission model featuring high capacity vacuum pump setups and ergonomic servicing decks.
Heavy duty dual-platform loader for standard freight containers, featuring high lift velocities and stable operation.
Designed to load heavy-cargo main decks on wide-body freighters, offering high lifting speeds and stability.
Highly versatile 7-ton capacity container/pallet loader for narrow and wide-body lower lobe decks.
Specialized passenger lifter truck providing smooth and secure cabin access for travelers with restricted mobility.
Features a spacious, climate-controlled cabin that lifts to match the aircraft door height for comfortable boarding.
As a global aviation ground equipment supplier, our manufacturing capabilities are backed by China's comprehensive industrial supply chain. This integration allows us to deliver high quality, rapid custom manufacturing, and stable production schedules, even during global material shortages.
Direct sourcing agreements with premier steel mills and copper foundries guarantee that raw material supply is never a bottleneck. This integration enables us to offer stable, competitive wholesale pricing and maintain production schedules for complex GSE orders.
By leveraging China's advanced semiconductor and battery packaging hubs, we integrate the latest IGBT converter cards, smart PLC controllers, and high-safety LiFePO4 cells. This allows us to keep production cycles short and deliver state-of-the-art power components.
Every 28V GPU undergoes comprehensive load tests on simulated aircraft circuits, temperature chambers, and vibration tests before leaving the factory. This ensures that every unit complies with military and international aviation standards.
Utilizing advanced electrical engineering and continuous R&D to deliver highly reliable ground power systems.
High-grade construction and components ensure long-term durability on demanding airport ramps.
Efficient supply chain management and inventory controls ensure on-time delivery for global orders.
Comprehensive support, spare parts distribution, and technical training keep fleets running smoothly.
The aviation ground support industry is changing rapidly, driven by automation, smart diagnostic systems, and green initiatives. We are actively developing next-generation ground power solutions to support these shifts:
Integrating telemetry modules that transmit real-time GPU health data (e.g., output currents, operating temperatures, error logs) directly to control centers. This allows maintenance teams to schedule service proactively and prevent unexpected downtime.
Our long-term product roadmap includes the development of hydrogen fuel cell-powered GPUs. This technology provides zero-emission operation with rapid refueling times, addressing the limitations of battery charging times for high-frequency operations.
Transitioning to Silicon Carbide (SiC) semiconductor switches, which allow for higher switching frequencies, lower heat generation, and smaller converter footprints. This results in lighter, more efficient GPU designs.
Deploying ground power equipment in international airports requires adherence to localized safety standards and reliable maintenance networks. We provide complete compliance documentation and dedicated technical support to guarantee maximum uptime for your fleet:
Whether you require custom dimensions, tailored electrical parameters, or branding matching your airline fleet, our engineering team can design a solution that meets your requirements. From initial design to factory acceptance testing, we offer a comprehensive service to streamline your procurement process.
We supply high quality ground support equipment and integrated services to airlines and logistics companies globally.
Providing a complete portfolio of high quality airport ground support equipment.
Supplying reliable GSE solutions to international airlines and air logistics carriers.
Comprehensive solutions spanning power units, passenger steps, tow tractors, and luggage dollies.
Rigorous quality control and on-time shipping schedules to keep your operations running.
We work closely with leading airlines and ground handlers to deliver reliable, long-term equipment solutions.
Standard aircraft cables experience a natural voltage drop under high current loads. Outputting exactly 28.5V at the source compensates for this line loss, ensuring that exactly 28.0V DC reaches the aircraft receptacle plug.
Solid-state GPUs plug into local utility grid power, converting AC to DC without emissions, minimal noise, and lower maintenance costs. Diesel-driven units are fully autonomous towable generators, making them ideal for remote aprons without utility power grids.
Modern GPUs use microprocessor-controlled solid-state converter cards. These boards feature dynamic current limiting and fast-acting over-voltage protection circuits (active within 1-2 milliseconds) to suppress transient voltage spikes and protect the aircraft's avionics.
Solid-state GPUs do not have internal combustion engines, which greatly simplifies maintenance. Routine service is limited to cleaning air filters, inspecting power cables and plugs for wear, and verifying output calibration on a load bank once or twice a year.
Yes, we manufacture multi-output units that feature both 28.5V DC outputs and 90kVA 400Hz AC outputs. This configuration allows a single unit to service a wider range of regional aircraft and commercial narrow-body aircraft.
By utilizing high-capacity lithium battery packs, these units eliminate diesel fuel consumption and engine maintenance. This configuration can reduce operating costs by up to 80% per cycle, depending on local utility electricity rates.
Chidge Dolly
