... , measuring kWh value, voltage, current, power, power factor, 2. Multi-tariff energy 3. RS485/Modbus Alibaba recommended produc Perfect, stability, Reliability ... . Reactive energy– 4 quadrant kvarhOptional Function:1. Statistics of multi-tariff energy: 8 periods of time, 4 different tariff2. Record historical ... .5%Frequency0.01Active energy0.5%Reactive energy2.0% Digital Measuring Meter