A system for adjusting power applied to an electrical apparatus, the system comprising: an input power control unit coupled to an Alternating Current, AC power source, wherein the input power control unit comprises: input terminals (1,2) adapted to be connected to the Alternating Current, AC power source; a switch coupled to the input terminals; a control unit connected to the switch to provide control signals to the switch and a rectifier connected to the switch; a power supply coupled to the input power control unit, wherein, the rectifier comprises a pair of diodes (21,22), each having an anode and a cathode; the input terminals are coupled to respective anodes of each of the pair of diodes; the cathodes of the pair of diodes are coupled together and to a first input terminal of the power supply; and an electrical apparatus communicatively coupled to the power supply and the input power control unit, wherein the electrical apparatus is configured to generate a usage pattern, the usage pattern identifying time periods when the electrical apparatus is likely to consume high levels of power and low levels of power, wherein power supplied to the electrical apparatus by the power supply is reduced by the input power control unit during a time period identified by the usage pattern when the electrical apparatus is likely to consume low levels of power, and wherein power supplied to the electrical apparatus by the power supply is increased by the input power control unit during a time period identified by the usage pattern when the electrical apparatus is likely to consume high levels of power; and a power management bus coupled to the control unit of the input power control unit, the power supply, and the electrical apparatus, wherein the electrical apparatus communicates energy management signals onto the power management bus based on the usage pattern, wherein in response to energy management signals provided on the power management bus, the control unit provides signals to the switch, to adjust power supplied to the electrical apparatus, wherein the switch comprises two switching devices, each of the switching devices having one end coupled to each of the anodes of the pair of diodes and the other end coupled to a second input terminal of the power supply. input terminals (1,2) adapted to be connected to the Alternating Current, AC power source; a switch coupled to the input terminals; a control unit connected to the switch to provide control signals to the switch and a rectifier connected to the switch; a power supply coupled to the input power control unit, wherein, the rectifier comprises a pair of diodes (21,22), each having an anode and a cathode; the input terminals are coupled to respective anodes of each of the pair of diodes; the cathodes of the pair of diodes are coupled together and to a first input terminal of the power supply; and an electrical apparatus communicatively coupled to the power supply and the input power control unit, wherein the electrical apparatus is configured to generate a usage pattern, the usage pattern identifying time periods when the electrical apparatus is likely to consume high levels of power and low levels of power, wherein power supplied to the electrical apparatus by the power supply is reduced by the input power control unit during a time period identified by the usage pattern when the electrical apparatus is likely to consume low levels of power, and wherein power supplied to the electrical apparatus by the power supply is increased by the input power control unit during a time period identified by the usage pattern when the electrical apparatus is likely to consume high levels of power; and a power management bus coupled to the control unit of the input power control unit, the power supply, and the electrical apparatus, wherein the electrical apparatus communicates energy management signals onto the power management bus based on the usage pattern, wherein in response to energy management signals provided on the power management bus, the control unit provides signals to the switch, to adjust power supplied to the electrical apparatus, wherein the switch comprises two switching devices, each of the switching devices having one end coupled to each of the anodes of the pair of diodes and the other end coupled to a second input terminal of the power supply.