A circuit breaker for an electric vehicle charging circuit for charging an electric vehicle with power from a power source, the circuit breaker comprising: a circuit protection unit structured to provide circuit protection between the power source and the electric vehicle; an electric vehicle charging control unit structured to control charging of the electric vehicle; a metering unit structured to meter power flowing between the power source and the electric vehicle; a display unit structured to display information including at least one of metering information and a status of electric vehicle charging; wherein the circuit protection unit includes primary separable contacts and secondary separable contacts, and wherein the circuit protection unit is structured to open the primary separable contacts in response to a detected overcurrent condition and to open the secondary separable contacts in response to a detected ground fault condition, wherein the circuit protection unit includes a ground fault sensor structured to sense current flowing through the circuit breaker and a ground fault detection unit structured to detect a ground fault condition based on current sensed by the ground fault sensor, and wherein the ground fault detection unit is structured to output a signal to cause the secondary separable contacts to open in response to the detected ground fault condition, characterized in that the circuit breaker further comprises a secondary display/interface unit including an optical interface and a blinkup bi-color light emitting diode, wherein the circuit breaker is structured to receive communications from an external device via the optical interface and to send communications to the external device by outputting a light pattern with the blinkup bi-color light emitting diode, and in that the ground fault current sensor includes a sensing coil used to sense current flowing through the ground fault current sensor and a self-test coil used in conjunction with the sensing coil to test the ground fault detection functionality of the circuit protection unit, wherein the ground fault detection unit is structured to determine that ground fault detection functionality is operating properly if the output of the sensing coil is a predetermined number of times the magnitude of the output of the self-test coil. a circuit protection unit structured to provide circuit protection between the power source and the electric vehicle; an electric vehicle charging control unit structured to control charging of the electric vehicle; a metering unit structured to meter power flowing between the power source and the electric vehicle; a display unit structured to display information including at least one of metering information and a status of electric vehicle charging; wherein the circuit protection unit includes primary separable contacts and secondary separable contacts, and wherein the circuit protection unit is structured to open the primary separable contacts in response to a detected overcurrent condition and to open the secondary separable contacts in response to a detected ground fault condition, wherein the circuit protection unit includes a ground fault sensor structured to sense current flowing through the circuit breaker and a ground fault detection unit structured to detect a ground fault condition based on current sensed by the ground fault sensor, and wherein the ground fault detection unit is structured to output a signal to cause the secondary separable contacts to open in response to the detected ground fault condition, characterized in that the circuit breaker further comprises a secondary display/interface unit including an optical interface and a blinkup bi-color light emitting diode, wherein the circuit breaker is structured to receive communications from an external device via the optical interface and to send communications to the external device by outputting a light pattern with the blinkup bi-color light emitting diode, and in that the ground fault current sensor includes a sensing coil used to sense current flowing through the ground fault current sensor and a self-test coil used in conjunction with the sensing coil to test the ground fault detection functionality of the circuit protection unit, wherein the ground fault detection unit is structured to determine that ground fault detection functionality is operating properly if the output of the sensing coil is a predetermined number of times the magnitude of the output of the self-test coil.