Use case · Aviation ground power
AmpereX engineers custom lithium and LiFePO4 battery-powered ground power units for aircraft — an alternative to diesel- and petrol-engine GPUs for suitable applications. The battery pack, BMS, power electronics, output configuration, aircraft interface, charging, enclosure, monitoring and protection are designed around the application each unit will serve.
The same engineering extends to aircraft batteries for engine starting, takeoff energy, small aeroplanes, and paramotors and powered paragliders.
A ground power unit supplies an aircraft's electrical systems while it is parked, so the aircraft does not need to run its own engines or auxiliary power unit for ground power. Conventional GPUs use a diesel or petrol engine to drive a generator. An electric ground power unit draws that energy from a rechargeable battery pack instead.
| Aspect | Diesel / petrol GPU | Battery-powered GPU |
|---|---|---|
| Energy source | Diesel or petrol engine driving a generator | Rechargeable lithium / LiFePO4 battery pack |
| Exhaust at the aircraft stand | Combustion exhaust while running | No tailpipe emissions during battery operation |
| Noise | Engine noise on the apron and in hangars | Lower operating noise; mainly cooling fans and power electronics |
| Fuel logistics | Refuelling, fuel storage and handling | Recharged from mains power; reduced dependence on fuel |
| Idle behaviour | Engine often idles while waiting for demand | Draws energy only when delivering power |
| Indoor / hangar use | Exhaust limits use in enclosed spaces | Better suited to hangars and enclosed areas |
| Operating limit | Fuel tank, refuelled on site | Battery capacity; runtime planned against duty cycle and recharge window |
Whether a battery GPU is a suitable diesel GPU replacement depends on the aircraft's power requirement, duty cycle, daily operating hours and the time available to recharge.
A battery GPU is a power system, not just a battery. AmpereX's custom battery engineering, BMS and power-system work covers each subsystem, designed together for the required output.
AmpereX can engineer battery GPUs at different scales. The figures below describe different possible configurations — they are not the specification of a single universal ground power unit.
High-current configuration
≈1,200 Apeak current
Configurations aimed at high-current demand — for example, short-duration peak loads — can be engineered to reach approximately 1,200 A peak, depending on the final design of the pack, BMS, power electronics and cabling.
Larger-scale configuration
≈150 kWcontinuous power
Larger systems can be engineered for approximately 150 kW of continuous power, subject to the required output voltage, current, duty cycle and application.
Final ratings for any system depend on the required output voltage, current, duty cycle and application, and are confirmed during the engineering of that system.
Aircraft differ in how they accept ground power. A battery GPU is engineered from the documented electrical requirements of the aircraft it will serve.
Many light aircraft, turboprops, helicopters and business aircraft use DC external power, commonly nominal 28 V DC. Requirements include steady-state current for ground operations and, where applicable, high-current engine-start support.
Larger transport aircraft commonly take 115/200 V AC, 400 Hz three-phase ground power. A battery-powered unit for this category needs an inverter stage sized for the continuous kVA the aircraft draws.
Voltage, current, duty cycle, start profile and connector type differ by aircraft and operator. Each system is engineered from the aircraft's documented electrical requirements, not from a generic specification.
Beyond ground power
The same lithium battery engineering behind battery GPUs applies to energy the aircraft itself needs — from the high-current pulse of an engine start to the peak power of an electric takeoff. AmpereX works on battery systems across these aviation applications.
STEP 1
Aircraft types, output voltage and form, continuous and peak current, duty cycle, operating hours and recharge window.
STEP 2
Cell chemistry, series–parallel layout, usable capacity and peak discharge capability.
STEP 3
Protection thresholds, balancing, thermal limits and coordination with the output stage.
STEP 4
DC–DC or inverter stage, output regulation, cables and aircraft connector.
STEP 5
Charger sizing, thermal management, enclosure, displays and fault handling.
STEP 6
Assembly, load testing against the defined profile, and handover to operators.
LiFePO4 batteries and high-current battery management products from the AmpereX catalogue, representative of the building blocks used in custom high-power battery systems.
A battery-powered GPU supplies electrical power to a parked aircraft from a rechargeable lithium or LiFePO4 battery pack, through power electronics and an aircraft connector, instead of from a diesel- or petrol-driven generator.
For suitable applications, yes. Whether a battery GPU can replace a diesel unit depends on the aircraft's power requirement, the duty cycle, daily operating hours and the time available to recharge. AmpereX engineers each system against those requirements.
Battery operation produces no tailpipe emissions, reduces local exhaust on the apron and in hangars, runs more quietly than a combustion-engine GPU, is recharged from mains power and reduces dependence on fuel.
AmpereX can engineer different scales of system. High-current configurations can reach approximately 1,200 A peak, and larger systems can deliver approximately 150 kW continuous power. These are different possible configurations, not the specification of one universal unit; the final rating depends on voltage, current, duty cycle and application.
The battery pack, BMS, power electronics, output configuration, aircraft interface and connector, charging system, enclosure, and monitoring and protection systems are all designed according to the application.
LiFePO4 is a thermally stable lithium chemistry with long cycle life, which suits equipment that is charged and discharged frequently. The final chemistry choice depends on the required power density, energy and operating conditions.
Yes. Engine starting draws a short, very high current pulse. AmpereX engineers lithium battery systems and start-support units with cells, current paths and BMS protection sized for that peak demand, based on the aircraft's starting requirements.
AmpereX engineers custom lithium battery packs for small aeroplanes, light sport and ultralight aircraft, and electric paramotors and powered paragliders, including takeoff and climb energy for electric propulsion. Each pack is designed around the aircraft or motor controller's voltage, power, weight and flight-time requirements.
Yes. AmpereX has delivered multiple battery and power projects for airports in Pakistan. Project-specific details are shared directly with prospective aviation clients where permitted.
Yes. Aircraft differ in whether they take DC or AC ground power, and in voltage, current and start requirements. Each battery GPU is engineered from the documented electrical requirements of the aircraft it will serve.
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