The basic difference we all can understand between any normal and inverter AC is in their energy consumption.
A 5 star normal AC is the most efficient normal AC, but it cannot be as efficient as an inverter AC because the inverter AC works on a totally different principle.The regular AC compressor has only one speed and the cooling is controlled by offing the AC compressor when a set cold temperature has been reached and then restarting the AC compressor when the room heats up and reaches a set temperature. For example, if you set the thermostat in the regular AC to cool the room to 22 degrees, then the AC compressor starts when the room temperature is 24 degrees and stops when the room has cooled to 20 degrees. This is the cycle that repeats itself throughout the period that the AC is on. This is a very inefficient way of the compressor working.
Whereas in Inverter AC, The inverter technology works like an accelerator in a car. When compressor needs more power, it gives it more power. When it needs less power, it gives less power.
With this technology, the compressor is always on but draws less power or more power depending on the temperature of the incoming air and the level set in the thermostat. The speed and power of the compressor are adjusted appropriately. This technology was developed in Japan and is being used there successfully for air conditioners and refrigerators. This technology is currently available only in split air conditioners.
Energy in any air conditioner is consumed by the motor that runs the compressor. In normal AC the motor runs for a longer period at constant load consuming more energy. But in inverter technology AC, there is a drive for controlling the speed of the motor and thus the load of the motor. The drive can dynamically control the speed of the compressor through the motor to suit various cooling requirements.This way of controlling the load of the motor electric bill can be reduced significantly in any inverter technology AC.
One more very good feature of the INVERTER AC is that even when it does need to start the motor, it does it in a very controlled fashion, gently ramping up the power, so that a transient (sudden) load is not felt on the power feeder line. This is one very useful feature when operating an INVERTER AC on a portable AC power generator system.
Therefore, in conclusion, it can be seen that the INVERTER AC, due to its advanced control capabilities, offers a very smooth mode of operation and also delivers outstanding performance in terms of energy conservation and overall efficiency.