Meeting the accuracy requirements of ANSI C12.1 and C12.20 Class 0.5, the WattNode® Revenue, a line of electric power meters, are designed for use in applications requiring revenue-grade accuracy. The meters support Modbus®, BACnet®, or LonTalk® communications protocol or a pulse output. The electric power meters are optimized for tenant submetering in residential and commercial spaces, PV energy generation metering, UMCS metering on military bases, and more. They are designed for 120/208/240-vac and 277/480-vac applications. Each meter is calibrated using NIST-traceable equipment following the procedures specified by ANSI C12 metering standards, and is supplied with a certificate of calibration. In addition to revenue-grade, bidirectional energy (kWh) metering, the networkable WattNode Revenue meters provide additional measurements, such as bidirectional power, demand, peak demand, reactive power, voltage, current, power factor, and line frequency. The WattNode Revenue Logger for LonWorks can store 12 weeks of five-minute readings.