It is unfortunate that the general public do not appreciate the distinction between energy and power. That allows cowboy firms who produce voltage reducing equipment to equate a 9% reduction of power with a 9% reduction of energy.
Legally they are right when claiming the power reduction but the conclusion they make is too complex for the innumerate public to realise thay are being ripped off.
Legally they are right when claiming the power reduction but the conclusion they make is too complex for the innumerate public to realise thay are being ripped off.