... measuring kWh value, voltage, current, power, power factor, 2. Multi-tariff energy 3. RS485/Modbus Alibaba recommended produc Perfect, ... 4 quadrant kvarh Optional Function:1. Statistics of multi-tariff energy: 8 periods of time, 4 different tariff2. Record historical ... 2%Current0.2%Power0.5%Power factor0.5%Frequency0.01Active energy0.5%Reactive energy2.0% PMAC905 3-phase energy meter remote control ...