Here is a basic explanation of Inverter units.
A basic conventional system has a compressor in it just like your fridge.
This compressor basically has two speeds. Flat out and Stop.
These systems use a lot of electricity in these types of motors because it takes a lot of energy to start a motor from ZERO. And when your home reaches the temperature that you requested on your climate control thermostat the motor will turn off completely.
With an inverter Air conditioning system, these motors are designed differently. when you turn on an inverter, the motor will start up slowly so that it does not use a lot of power, then the motor slowly speeds up to full power on a sliding scale. This way the system uses less power to initially start up.
As the system gets closer to reaching the temperature that you requested in your home, the motor will start slowing down, thus using less electricity. And as an added benefit, the temperature in your home will remain more constant.
The end result is that the motor does not have to completely stop and because of this you don't use as much electricity.
We do have a graph that explains this if any one would like me to send it please
e-mail info@apolloair.eu (sorry I do not know how to send it via PM)
The energy A rated inverters of all the leading brands are the most efficient to run, with running costs as little as 4-5 cents per hour for a typical lounge unit.
Steve