Description

QEED Single-Phase AC/DC Network Analyzer

QI-POWER-485 Single Phase AC/DC Power & Energy Meter

The QEED QI-POWER-485 is a single-phase AC/DC TRMS power and energy meter with RS485 Modbus RTU communication. It measures current, voltage, active power, reactive power, apparent power, peak values, frequency, power factor, bidirectional energy and THD.

It is suitable for applications where both AC and DC energy must be monitored from one compact device, including photovoltaic systems, inverters, UPS, battery systems, machine tools, charging systems, control panels and energy management installations.

Measurement Single-phase AC/DC TRMS

Communication RS485 Modbus RTU

Energy Bidirectional kWh measurement

Family Range 50A, 100A and 300A versions

Overview

QI-POWER-485 is designed for direct single-phase current and voltage measurement without the need for external current transformers in standard applications. The device provides Modbus RTU data for PLC, SCADA, EMS, BMS, datalogger, Modbus gateway, IoT gateway and IoTWatt 4.0 integration.

The product family includes different current ratings, including 50A, 100A and 300A versions. This page covers the general QI-POWER-485 family and is suitable where the exact current rating will be selected based on the project requirement.

Positioning: Compact single-phase AC/DC Modbus power meter for energy monitoring, PV, UPS, inverter, battery, machine and IoTWatt 4.0 applications.

Key Features

AC/DC Energy Measurement

Measures both AC and DC energy with bidirectional energy visibility.

TRMS Measurement

Measures TRMS current and voltage, suitable for non-ideal electrical waveforms.

RS485 Modbus RTU

Direct communication to Modbus master devices, PLC, SCADA, EMS, BMS and IoT gateways.

THD Available

THD value is available through RS485 for basic waveform distortion visibility.

DIN Rail Mounting

Compact mounting for electrical panels, control panels and monitoring enclosures.

Software Configurable

Configurable through FACILE / Q-WIZARD software or directly through Modbus registers.

Measurements Available via RS485

Measurement Group	Available Values
Current	IRMS, Ipeak
Voltage	VRMS, Vpeak
Power	Active power W, reactive power VAR and apparent power VA
Energy	Bidirectional kWh, positive and negative energy
Power Factor	Cosφ
Frequency	Frequency measurement
Power Quality	THD, voltage peak and current peak visibility

QI-POWER-485 Family

Model	Current Measurement	Voltage Measurement	Use Case
QI-POWER-485	50A AC/DC	Up to 800Vac / 1000Vdc	General single-phase AC/DC energy monitoring
QI-POWER-485-100	100A AC/DC	Up to 800Vac / 1000Vdc	Higher current single-phase AC/DC monitoring
QI-POWER-485-300	300A AC / 400A DC	Up to 800Vac / 1000Vdc	High current AC/DC monitoring, UPS, PV, inverter and industrial systems
QI-POWER-485-LV	50A AC/DC	Up to 80Vac / 100Vdc	Low-voltage AC/DC systems, battery and DC motor applications
QI-POWER-485-300-LV	300A AC / 400A DC	Up to 80Vac / 100Vdc	High-current low-voltage AC/DC monitoring

Selection note: Confirm the required current rating and voltage range before ordering. Use the LV versions for low-voltage AC/DC applications up to 80Vac / 100Vdc.

Technical Highlights

Parameter	Specification
Product Type	Single-phase AC/DC TRMS power and energy meter
Measurement Type	RMS or DC measurement
Current Measurement	50A, 100A or 300A AC / 400A DC depending on model
Voltage Measurement	Up to 800Vac / 1000Vdc for standard versions
Power Supply	9 to 30Vdc with polarity reversal and over-temperature protection
Accuracy Reference	Voltage, current and active power: <0.5% F.S.; energy: ±1% of reading; Vpeak / Ipeak: ±5% F.S.
Output	RS485 Modbus RTU
Configuration	FACILE / Q-WIZARD software or Modbus register map
Mounting	DIN rail mounting, horizontal or vertical depending on model installation
Isolation	4kV galvanic isolation for voltage input

Applications

Photovoltaic Systems

Monitor AC/DC power and energy, parallel string voltage and current, inverter-side values and generated energy.

Energy Management

Send current, voltage, power and energy values directly to Modbus master devices and EMS platforms.

UPS and Battery Systems

Monitor AC/DC power, energy flow and bidirectional energy in backup power and battery systems.

Machine Tools

Measure machine power, current, voltage and energy for production and maintenance visibility.

Charging Systems

Support AC/DC monitoring in charging columns and related electrical infrastructure.

IoTWatt 4.0

Can be integrated through RS485 gateways into IoTWatt 4.0 dashboards, reports and analytics.

Configuration

QI-POWER-485 can be configured using an RS485-USB serial link and FACILE / Q-WIZARD software. It can also be configured directly from a Modbus master system using the register map.

Set Modbus address and communication parameters
Set baud rate and communication delay
Configure CT and VT transformation ratio when required
Select RMS or DC measurement mode
Adjust filter from faster response to more stable measurement
Select frequency measurement on current channel when needed
Set minimum current cut-off threshold
Set minimum power cut-off threshold
Save energy counters on internal flash memory
Restore factory default settings

Commissioning note: Correct Modbus address, baud rate, scaling and measurement mode must be confirmed before connecting the meter to a permanent monitoring or energy management platform.

FACILE / Q-WIZARD Software Functions

Function	Purpose
Type of Measure	Select RMS or DC-only measurement behaviour and polarity handling.
Save on Energy Flash	Allows energy counters to be saved directly on the device flash memory.
Report of Transformation	Defines current and voltage transformation ratio. Default ratio is 1:1.
Filter	Adjusts reading response for faster output or more stable measurement.
Minimum Current Threshold	Sets current cut-off value. Below this value the device reads zero.
Minimum Power Threshold	Sets power cut-off value. Below this value the device reads zero.
Factory Default	Restores the device to default configuration.

RS485 Modbus Integration

QI-POWER-485 can be connected into an RS485 Modbus RTU network and read by PLC, SCADA, EMS, BMS, Modbus gateway, datalogger, IoT gateway or IoTWatt 4.0. It is suitable for both temporary commissioning checks and permanent energy monitoring installations.

Use unique Modbus addresses for multiple meters on one RS485 bus
Verify baud rate, parity and Modbus response delay during commissioning
Confirm voltage, current and energy scaling before live monitoring
Use USB-RS485 converter for configuration and troubleshooting
Use RS485 gateway for cloud monitoring and IoTWatt 4.0 integration

QI-POWER-485 Supply and Integration

Saturn Pyro supports QEED QI-POWER-485 single-phase AC/DC power meters for photovoltaic systems, inverters, UPS, batteries, machine tools, charging systems, RS485 Modbus integration, IoT gateway connection and IoTWatt 4.0 projects in Malaysia.

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More detail about Saturn Pyro Sdn Bhd

QI-POWER-485 Single Phase AC / DC Energy Meter