In this technology, advanced sensors detect the actual weight of the tub where you keep your clothes to wash and the machine gives adequate speed to wash your clothes. Because the machine spins according to the weight of the clothes you put in the tub. Thus energy has been highly optimized in this technology. In result you will be benefited as the following:-
There is very little noise in this because the tab is directly connected to the motor. There is no other object like belt in between. This saves a lot of electricity. An inverter based washing machine does not cost much.