PowerCube is a device designed to measure AC power usage. It rectifies and regulates wall voltage to provide DC voltage for operation and runs the epic platform.

To provide 3.3V and 5V for the energy metering IC, processor, and radio to function, PowerCube employs an off-line inductorless switching regulator, the Supertex SR086. Without requiring high voltage capacitors, this device and its external components are low-volume, a key factor in its fitting into the cubic inch form factor. It also has a high enough current output, 100mA maximum, to power the energy metering IC and the radio at the same time.

Energy metering is preformed by the Analog Devices ADE7753 energy metering IC.

Based on the epic platform, PowerCube runs a Texas Instruments MSP430 processor and CC2420 radio.