What should I do if RS485 communication fails?

First, check whether the RS485 wiring is correct, especially the A and B terminals. Then verify the address, baud rate, and communication settings to ensure they match the host system.

What is the difference between ADW300 and ADW300A-CT?

ADW300 has built-in current transformers, while ADW300A-CT uses external split-core CTs, which are more convenient for retrofit projects and existing electrical systems.

RS485 for Retrofit Energy Monitoring

Name: Acrel Adw300 IoT Smart Power Meter with 4G/WiFi/Lora/RS485 for Retrofit Energy Monitoring
Brand: Jiangsu Acrel Electrical Manufacturing Co., Ltd.
SKU: 2314734405

Jiangsu, ChinaJiangsu Acrel Electrical Manufacturing Co., Ltd.

US$70.00-91.00

1 Piece

Sample price:US$70.00/piece.Request sample

Product profile

Customization

Available

Warranty

2 Years

Display

Digital

Model NO.

ADW300

Installation

Direct Connected

Usage

Multi-Functional Energy Meter, Watt-Hour Meter, Meter for Industry and Home Use, Standard Electric Energy Meter, Reactive Energy Meter, Multi-rate Watt-hour Meters, Maximum Demand Meter

Electric Equipment

Three-phase Four-wire

Theory

Electronic Meter

Power Meter Connection

Terminal

Measured Signal

Continuous Wave

Type

Energy Meter

Certification

RoHS, ISO, CE

Customized

Transport Package

Carton

Specification

17*15*13

Trademark

Acrel

Origin

China

HS Code

9028301400

Production Capacity

20000

Key features

Supports multiple wireless communication options including 4G, WiFi, LoRaWAN, and LoRa for flexible IoT connectivity.

Built-in wireless communication module eliminates the need for additional gateways and simplifies installation.

Provides accurate three-phase energy measurement for low-voltage power distribution systems.

Supports remote energy monitoring and data transmission for intelligent power management.

Compact design allows flexible installation in distribution boxes and space-limited applications.

Supports RS485 communication with Modbus-RTU protocol for easy system integration.

Measures multiple electrical parameters including voltage, current, active power, reactive power, power factor, and energy consumption.

Supports external CT connection, providing flexible current measurement solutions for different applications.

Enables decentralized energy monitoring without complex wiring, reducing installation costs.

Ideal for smart buildings, industrial energy monitoring, and IoT-based power management applications.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceExperienced Team

Jiangsu Acrel Electrical Manufacturing Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤4.66h

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization and R&D capabilities, including ODM, OEM, SDK availability, multiple design tools, and documented design review, verification, and validation records. Production-related evidence includes SMT, assembly, and automated processing lines, inventory capacity, contracts with associated subcontractors, and standardized finished-product inspection instructions. Service management is supported by written procedures and records for corrective actions, complaints, supplier assessment, and quality assurance. The supplier has overseas agents or branches, export rights, and prior participation in MEE Middle East Energy, but reports no overseas warehouse or showroom and lists zero countries offering overseas services. Financial credibility cannot be assessed because only years are provided, without non-financial supporting results. No explicit certification holdings or customer case details are provided.

Supplier typeThe supplier operates or coordinates SMT, assembly, and automated processing facilities, maintains inventory capability, and has valid manufacturing contracts with associated subcontractors. It also holds self-operated import/export rights and has overseas agents or branches, indicating a manufacturing-oriented supplier with international service arrangements.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions, customer complaints, service-capability assessment, and quality assurance. Overseas agents or branches and prior participation in an offline trade show support service reach, while the absence of overseas warehouses and showrooms limits the evidence for localized after-sales infrastructure.

R&D capabilityThe supplier reports new products during the past year, ODM services, SDK availability, R&D responsibilities covering new-product development and production technology support, and use of AutoCAD, Pro/E, and SolidWorks. It also maintains auditable design input, output, review, verification, and validation documentation, supporting a demonstrated product-development process.

Production capacityProduction evidence includes SMT, assembly, and automated processing lines, standardized finished-product inspection instructions, inventory capability, valid contracts with associated subcontractors, and lead times within 15 workdays in both peak and off-seasons. These stated capabilities support a positive assessment of manufacturing and delivery readiness.

Customization capabilityThe supplier explicitly provides customization from samples, customization from designs, full customization, minor customization, and flexible customization. The same broad range is reported across R&D and design-service capability records, indicating substantial customization coverage.

Product Q&A

Q:What's the biggest advantage of ADW300?

ADW300 has its built-in wireless communication module which allow it to realize 4G LTE, WiFi, NB-IoT, LoRa upstream communication without using extra IoT gateways. For the application scenarios when the meters can't be of centralized installation, ADW300 will usually be the best option for monitor 3-phase circuits that were far from each other.

Q:What communication methods does ADW300 support?

ADW300 supports various communication methods including 4G, WiFi, LoRaWAN, LoRa, and RS485 communication, allowing flexible selection according to different project requirements.

Q:Does ADW300 require an additional gateway?

No. ADW300 integrates wireless communication modules inside the meter, eliminating the need for additional gateways and reducing installation complexity.

Q:What applications is ADW300 suitable for?

ADW300 is widely used in smart buildings, industrial energy monitoring, power distribution systems, and IoT energy management applications, especially for locations where centralized installation is difficult.

Q:What electrical parameters can ADW300 measure?

ADW300 can measure voltage, current, active power, reactive power, power factor, frequency, and energy consumption, providing comprehensive energy data.