An invertor ac system differs from a standard system by not having to run at 100% power at all times. With a standard ac system, every time the compressor starts up it is running at 100% power. In Florida this can happen up to 30 to 40 times a day. With an inverter system the compressor will operate at the capacity that is being called for. If you have a 5 ton system , this means your system can operate at 20% , 40% , 60% ,80% and 100% depending on the cooling needed at the time. This results in a more efficient and comfortable environment for your home.