... value, voltage, current,power,power factor, 2. Multi-tariff energy 3. RS485/ ... measuring kWh value, voltage, current, power, power factor, 2. Multi-tariff energy 3. RS485/Modbus Alibaba ... . Apparent power –Sa, Sb, Sc, ∑Q6. Power factor—PFa, PFb, PFc, ∑PF7. Frequency8. Active energy—4 ... port: support Modbus-RTU protocol ParameterAccuracyVoltage0.2%Current0.2%Power0.5%Power factor0.5%Frequency0.01Active ...