A monitoring system is for an electric vehicle and an electric vehicle supply equipment. The electric vehicle supply equipment is structured to communicate with the electric vehicle to charge the electric vehicle. The monitoring system includes a monitoring component structured to monitor communication and monitor energy or power flow between the electric vehicle supply equipment and the electric vehicle, a storage component cooperating with the monitoring component to store information corresponding to the monitored communication and the monitored energy or power flow between the electric vehicle supply equipment and the electric vehicle, and a power supply structured to power at least one of the monitoring component and the storage component.