According to Inventor (2017) “an Inverter is used to control the speed of the compressor motor, so as to continuously regulate the temperature. The DC Inverter units have a variable-frequency drive that comprises an adjustable electrical inverter to control the speed of the electromotor, which means the compressor and the cooling / heating output.” In other words, Inverter AC Units use a device called Inverter manage the flow of electricity going to the motor inside the AC Unit. Hence, the name ‘Inverter AC Unit’.