of 220 vac for 230 vac systems so under the conditions of extreme or overvoltages the voltage decreasing ac voltage regulator keeps the output voltage to the load at the selected set energy savings voltages under the conditions of the input ac mains voltage falling below the energy savings set voltage in this example 114 vac for nominal 120 vac systems and 220 vac for nominal 230 vac systems if a full avr is used then the full avr will not only be using internal power to increase or boost the low input mains ac voltage but that will not save as much energy as the present invention as below the set energy saving voltage the control electronics will sense the low input ac mains voltage switch off the voltage decreasing ac voltage regulator power electronics saving internal energy and activate the series bypass contactor hence the low main ac input voltage is now applied directly to the load minimizing the voltage drop if the voltage decreasing ac voltage regulator stayed connected in the circuit and additional energy savings is achieved by this low input mains ac voltage being applied directly to the load through the series bypass contactor also when the input mains ac voltage increases above the set energy savings voltage the series bypass contactor is switched out and the voltage decreasing ac voltage regulator is.