WiFi Smart Meters: Making Power Monitoring More Convenient

In residential, commercial, and industrial power distribution environments, real-time access to electricity consumption data is fundamental to effective energy management and cost accounting. Traditional manual meter reading is inefficient and results in data delays, making it increasingly inadequate for the requirements of precise energy management.
With the maturation of wireless communication technology in the field of power metering, WiFi smart meters offer an efficient solution for remote electricity monitoring. Through a WiFi connection, users can view real-time consumption data on their mobile devices without needing to be on-site, significantly reducing operation and maintenance costs.
To address diverse power metering and monitoring needs, Donghong Electronics has introduced three WiFi smart meter models—SDM230-WIFI, SDM630-WIFI, and SEM3-WL-2—covering single-phase metering, three-phase metering, and intelligent power monitoring. All three models support integration with the Tuya Smart Life app or the Donghong "Hongyun" (Cloud) app, offering flexibility for various project management platforms.

SDM230-WIFI | Single-Phase Metering Solution

Application Scenarios
Suitable for single-phase electrical systems in residential buildings, commercial facilities, small-scale power distribution networks, and AC charging infrastructure.

Product Features

100A Direct Connection for Simplified On-Site Installation

Supports direct connection up to 100A, eliminating the need for external current transformers (CTs). This reduces the complexity of CT selection and wiring, thereby enhancing on-site installation efficiency.

36mm Slim Design to Save Space in Distribution Boards

With a width of only 36mm, the unit is designed for standard DIN-rail mounting. Its compact structure minimizes space consumption within distribution boards, facilitating easier equipment layout.

MID-Certified for Regulatory Compliance

The product is MID-certified, ensuring compliance for projects and markets that require certified metering equipment.

Bi-Directional Energy Metering for Photovoltaic (PV) Applications

Supports both forward and reverse energy metering—tracking energy imported from the grid and energy exported to the grid—making it ideal for standard electrical installations as well as residential PV systems involving bi-directional energy flow.

SDM630-WIFI | Three-Phase Multi-Parameter Monitoring

Application Scenarios

Power metering and energy consumption monitoring for commercial buildings, industrial facilities, and three-phase power distribution systems.

Product Features

Comprehensive Parameter Measurement for a Complete Overview of Energy Usage

Supports the measurement of various electrical parameters, including voltage, current, power, frequency, and power factor. In addition to energy consumption data, it provides real-time visibility into key operating parameters of three-phase systems, offering a robust data foundation for energy monitoring and daily management.

Bi-directional Energy Metering for Distributed Energy Resources

Supports both forward and reverse energy metering, making it ideal for three-phase distribution systems integrated with distributed energy resources—such as photovoltaic (PV) solar power—allowing for clear tracking of both power generation and consumption.

MID-Certified for Compliant Metering Projects

The product is MID-certified, ensuring it meets the regulatory requirements for projects that mandate certified metering equipment.

WiFi-Enabled Remote Communication to Minimize On-Site Meter Reading

Utilizes WiFi for the wireless transmission of power data, enabling users to view real-time electrical parameters and energy consumption information via mobile devices, thereby significantly reducing the need for manual, on-site meter reading.

SEM3-WL-2 | Smart Power Monitoring

Application Scenarios

Ideal for three-phase power monitoring scenarios that require high real-time performance and reliability, such as balcony-based photovoltaic (PV) energy storage systems.

Product Features

50ms Data Refresh Rate for Real-Time Insights

With a data refresh rate of 50ms, the device provides rapid updates on power measurements, offering timely and reliable data to support dynamic load monitoring and energy management analysis.

Dual Communication (WiFi + RS485) for Flexible System Integration

Supports both WiFi and RS485 communication (compatible with the Modbus RTU protocol). Data can be transmitted wirelessly via WiFi or integrated into existing monitoring systems through RS485, accommodating diverse on-site networking requirements.

Phase Sequence Self-Adaptation to Reduce On-Site Commissioning Costs

In the event of incorrect phase sequence or wiring order, adjustments can be made remotely via commands sent from a computer. This eliminates the need for repetitive manual rewiring, streamlining the on-site commissioning process.

CT Disconnection Detection and Ratio Identification for Enhanced Reliability

Features CT (current transformer) disconnection detection and ratio identification. This assists on-site personnel in verifying transformer connections and ratio configurations, enabling the prompt identification of wiring errors or parameter misconfigurations to ensure measurement accuracy.