Product detailed description

The SONOFF Smart Expandable Power Meter - 4-Channel Add-On Relay

The SONOFF Smart Expandable Power Meter - 4-Channel Add-On Relay is an expansion module designed to complement the main unit of the SONOFF Smart Power Meter. This add-on allows you to control and monitor multiple circuits or appliances simultaneously through four independent relays. It integrates seamlessly with the main power meter unit to enhance its capabilities.

Key features include:

• 4 Independent Relays: Control up to four separate circuits or appliances.
• Remote Control: Operate and monitor connected devices via the eWeLink app.
• Energy Management: Provides detailed insights into energy usage for each channel.
• Compatibility: Works with the SONOFF Smart Power Meter main unit, Google Assistant, and Amazon Alexa.
• Expandable: Easily integrates with the existing smart energy monitoring setup

This add-on relay module is ideal for users needing to manage multiple electrical devices and optimize their energy consumption efficiently.

RS-485 Communication Allows for "Smart Stackable":

The SPM-Main communicates with the cloud through Ethernet or WiFi, and communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission.

Power Metering

Want to know the power consumption changes of each stall? Want to realize the unified management of the whole shopping mall? By checking eWeLink App on your mobile phone, you can monitor the electricity usage without leaving home. Through the eWeLink App, you can obtain the power consumption through a touch.

128 Isolated Channels & Each Up To 20A

One SPM-Main can be connected 32SPM-4Relays. Each SPM-4Relay has 4 isolated channels to help the tenant to solve the problem in electric charge sharing. Each channel can support maximum current of 20A, no fear of high power load.

Get Over 180-day of Energy Usage Data

Available SD card local storage. You can insert the SD card into SPM-Main to download and check over 180 days of your energy usage history at any time of the day through HTTP API. No need to worry about missing important information.

Simple Installation

You can install the SPM-Main and SPM-4Relays step by step following the user manual. With the guide rail, they can be installed into the right place with ease to make your room looks simple and tidy.