Product detailed description

SONOFF Smart Expandable Power Meter - Main Unit

SONOFF Smart Expandable Power Meter is a smart energy monitoring device designed to track electricity consumption in real time. The main unit can be connected to additional sensors to expand monitoring capabilities across various circuits or appliances. It provides precise energy measurements, allowing users to manage and optimize their energy usage more efficiently.

Key features include:

• Real-time energy monitoring.
• Expandable functionality with additional sensors.
• Remote control and monitoring via the eWeLink app.
• Compatibility with smart home platforms like Google Assistant and Amazon Alexa.

This device is perfect for homeowners looking to reduce their electricity consumption and manage their energy usage smartly.

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.