What is Ground Power Unit?

A ground power unit (GPU), also known as an aircraft ground power unit, is a device that provides electrical power to an aircraft while it is on the ground. GPUs are used to start the aircraft's engines, as well as to provide power for the aircraft's systems, such as the lights, air conditioning, and avionics.

GPUs come in a variety of sizes and shapes, and are typically powered by a diesel engine or a gas turbine. Some GPUs are self-contained units, while others are towed behind a vehicle.

To use a GPU, the GPU is connected to the aircraft's electrical system using a cable. The GPU then provides power to the aircraft's batteries, which in turn power the aircraft's systems.

GPUs are essential for the safe and efficient operation of aircraft. They provide the power that the aircraft needs to start its engines and to operate its systems, and they also help to protect the aircraft's batteries from being drained.