The WattNode® Wide-Range Modbus® meter measures bi-directional energy (kWh), power (kW demand), voltage, current, power factor, and 90+ Modbus registers. The Wide-Range meter works on all electrical services from 100 to 600 Vac, single-phase or three-phase, wye or delta. It can be powered line-to-neutral or line-to-line. The meter communicates using Modbus® RTU over an RS-485 network. Meter details page.