IoT iMETER PRO

Measure. Connect. Optimize.

Class 0.5s three-phase energy meter with dual CT channels, open protocol stack, and cloud-native IoT architecture.

SunSpec EEBUS Modbus RTU MQTT Wi-Fi LAN
DIN 35mm Rail Mount
0.5s accuracy class IEC 62053-22 certified
0 CT inputs Dual-channel monitoring
0 protocols Open IoT architecture
0A max. current Commercial-grade capacity

Dual-Channel Metering

Two measurement points.
One device.

Monitor grid consumption and third-party inverter output simultaneously through independent CT channels.

Utility Grid Main Supply 3rd-Party Inverter / DER CT CH-1 Grid Metering CT CH-2 Inverter Metering iMeter Pro 6 CT · Class 0.5s MEASUREMENT HUB CLOUD WattDesk Cloud SMART HOME EMS / HEMS WATTSONIC ECOSYSTEM WattMate WattMatic Home WattCision C&I Wi-Fi EEBUS Modbus

Grid Import/Export

CT Channel 1 measures bidirectional power flow at the grid connection point. Track import, export, and net consumption in real time.

Inverter Output

CT Channel 2 independently monitors any third-party inverter output. Brand-agnostic — works with any solar, battery, or hybrid inverter.

Surplus Calculation

Cross-reference both channels to precisely compute available surplus power for thermal diversion, battery dispatch, or EV charging.

IoT Architecture

Open protocols. Seamless integration.

Six communication interfaces ensure compatibility with every energy management ecosystem.

iMeter Pro with external Wi-Fi antenna and terminal block wiring
mqtt-monitor — wattsonic@imeter
Application

SunSpec Modbus

IEEE 1547-2018 compliant DER information models. Standard meter blocks with 4-quadrant energy data, power factor, and frequency.

IEC Compliant

EEBUS SPINE/SHIP

Native smart home energy protocol with TLS-secured transport. Direct communication with heat pumps, EV chargers, and HEMS controllers.

TLS Secured
Transport

Wi-Fi 802.11 b/g/n

Wireless connectivity for cloud telemetry, OTA firmware updates, and WattDesk platform integration.

Ethernet 10/100

Hardwired connection for mission-critical installations. Low-latency data path for real-time EMS dispatch.

RS485 Modbus RTU

Industrial serial bus for direct inverter communication and legacy BMS integration. Up to 32 devices on a single bus.

MQTT 5.0

Lightweight publish/subscribe messaging for cloud telemetry and remote monitoring. Ideal for large-scale fleet management.

Pub/Sub
Edge Intelligence
Real-time power calculation
10ms sampling rate
Tamper detection
OLED local display
OTA firmware updates
4-quadrant measurement

Precision Metering

Class 0.5s. Four-quadrant. Three-phase.

Live
Q1 Active Import Q2 Reactive Import Q3 Active Export Q4 Reactive Export +Q (Inductive) -Q (Capacitive) -P (Export) +P (Import) 0.0 kW 0.0 kvar

Power Measurement

Active Power (P)±0.5%
Reactive Power (Q)±0.5%
Apparent Power (S)±0.5%
Power Factor (PF)±0.5%

Electrical Parameters

Voltage (L-N / L-L)±0.5%
Current (per phase)±0.5%
Frequency±0.01Hz
Energy (kWh / kvarh)Class 0.5s

Per-Phase Data

Phase A / B / C voltage230V (L-N)
Phase A / B / C currentup to 400A
Per-phase active powerW / kW
Per-phase energy accumulatorkWh

Product Range

120A to 400A. Every installation covered.

iMeter

Standard
  • RS485 Modbus RTU
  • OLED Display
  • Class 0.5s Accuracy
  • Single or Dual CT
  • DIN Rail Mount
RS485 Wi-Fi LAN

iMeter Pro

IoT Ready
  • RS485 + Wi-Fi + LAN
  • OLED Display
  • Class 0.5s Accuracy
  • Single or Dual CT
  • SunSpec + EEBUS
  • WattDesk Cloud
  • OTA Updates
RS485 Wi-Fi LAN
iMeter and iMeter Pro — front panel with OLED display and rear panel with RJ45 Ethernet port
Series
CT Channels
Max Current
iMeter-1CT-120A
Single CT · 3 inputs 120A RS485
16 models available across all configurations

Technical Data

Specifications

Electrical Input

Rated Voltage
230V (L-N) / 400V (L-L)
Frequency
50 – 60 Hz
Phase Configuration
Three-phase, 4-wire
Max. Current Range
120A / 200A / 300A / 400A (via CT)

Accuracy

Active Energy
Class 0.5s (IEC 62053-22)
Reactive Energy
Class 2 (IEC 62053-23)
Voltage / Current
±0.5%
Power / Power Factor
±0.5%

Communication

Wired Serial
RS485 Modbus RTU
Wireless
Wi-Fi 802.11 b/g/n (Pro)
Ethernet
10/100 Mbps RJ45 (Pro)
Energy Protocols
SunSpec Modbus, EEBUS SPINE/SHIP
IoT Messaging
MQTT 5.0 (Pro)

Mechanical

Dimensions
86 × 72 × 70 mm
Weight
150 g
Mounting
DIN 35mm Rail
Protection
IP20

Environmental

Operating Temp.
-30 ~ +60 ℃
Humidity
<95% RH, non-condensing
Altitude
<3,000 m
Display
OLED

Ecosystem Integration

The intelligent edge of WattDesk.

WattDesk Portal

Cloud-based monitoring dashboard with real-time power flow visualization, historical analytics, and multi-site fleet management.

WattMate Diverter

Paired with WattMate, iMeter provides the surplus detection signal that drives intelligent thermal diversion with watt-level precision.

WattMatic Home

Residential HEMS controller for smart load scheduling, PV self-consumption optimization, and dynamic tariff response.

WattCision C&I

Commercial & industrial energy management platform with peak demand control, power quality analysis, and multi-meter aggregation.

HEMS / Third-Party

EEBUS and SunSpec protocols enable direct integration with any compliant home energy management system, heat pump, or EV charger.

Open Architecture

Modbus RTU registers fully documented. Build your own integration with any EMS, SCADA, or BMS platform.

Specify iMeter.

Tell us your metering requirements. We will recommend the optimal model, CT configuration, and protocol stack.

Request consultation Download datasheet
IEC 62053 SunSpec EEBUS CE