Abstract: A metering device for monitoring power flow at a premises includes a metering module that measures power flow on powerlines at a premises and provides power flow data characterizing the power flow on the powerlines. The metering device also includes a communication module coupled to the metering module that transmits power flow data to a node on a meter network. The metering device further includes an energy storage element coupled to the metering module and the communication module. The energy storage element provides backup power to the metering module and the communication module in response to a voltage on the powerlines dropping below a first threshold for a time interval exceeding a second threshold, such that the metering module measures the power flow on the powerlines and provide the power flow data for a backup interval of time.