The SONOFF SPM-4RELAY is a professional-grade 4-channel DIN rail-mounted smart relay designed for precise high-power control and energy monitoring. Ideal for smart homes, commercial spaces, server rooms, vending machines, and industrial energy management projects, it allows simultaneous management of up to four devices independently. When paired with the SPM-Main unit, the SPM-4RELAY provides remote control, real-time power usage monitoring, overload protection, and cloud-based data storage via the eWeLink platform. The relay supports automated schedules, scene integration, and instant alerts, enabling intelligent energy management and operational efficiency. Built with durable materials and compact DIN-rail design, the SPM-4RELAY ensures reliable performance, safe operation, and seamless integration into professional and residential electrical setups. Key Features 4 Independent Smart Relay ChannelsControl and monitor up to four electrical circuits individually. Energy Monitoring (When Used with SPM-Main)Real-time tracking of voltage, current, power consumption, and historical energy data. DIN Rail Mounting DesignEasy installation into power distribution boxes or control panels.  High Power & Safety ProtectionSupports up to 20A per channel (MAX 40A total) with overload and short-circuit protection. Remote Control via eWeLink AppTurn circuits ON/OFF anytime, anywhere using your smartphone.  Cloud & Local StorageEnergy data is stored securely on the cloud or locally via microSD card (up to 256GB) on the SPM-Main. Works with Schedules & Automation ScenesSupports timers, scenes, and smart schedules across multiple relay channels.  Industrial & Commercial Grade ReliabilityPerfect for offices, workshops, apartment complexes, rental properties, vending machines, and server rooms. Technical Specifications Specification Details Model SONOFF SPM-4RELAY Channels 4 × Independent Relays Input / Output Voltage 100–240V AC Max Load per Channel 20A Total Max Load 40A Wireless Communication RS-485 (Connects to SPM-Main) Energy Monitoring Yes (Requires SPM-Main Module) Data Storage Cloud or microSD up to 256GB (via SPM-Main) Installation Type DIN Rail Mount Working Temperature -10°C to +40°C Material Flame-Retardant PC V0 Dimensions 143 × 90 × 66 mm App Support eWeLink (iOS & Android) Certifications CE / FCC / RoHS Why Choose SONOFF SPM-4RELAY? Smart 4-channel control for homes and commercial environmentsReal-time energy monitoring and advanced protectionWorks with timers, automation scenes, and cloud storageIdeal for offices, smart buildings, vending machines, server rooms & factoriesModular and scalable – can connect multiple relay modules using SPM-Main

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The SONOFF SPM-Main is the central control and communication gateway of the SONOFF Smart Power Management system, designed to deliver reliable, scalable, and intelligent energy management. It connects to up to 32 SPM-4Relay modules through RS-485 communication, enabling centralized control of large electrical installations from a single platform. Through the eWeLink app and cloud system, users can remotely control circuits, monitor real-time power consumption, store historical energy data, and set overload protection rules to enhance safety and efficiency. Built for commercial, industrial, and residential projects, the SPM-Main supports professional energy management scenarios such as factories, offices, apartment buildings, and data centers. Its robust design ensures stable communication, accurate monitoring, and long-term reliability, while advanced data analysis helps optimize electricity usage, reduce costs, and prevent electrical risks. With centralized management, flexible expansion, and smart automation capabilities, the SONOFF SPM-Main forms the backbone of a powerful and professional smart power management solution. Key Features Central Gateway for Power ManagementControls and communicates with up to 32 SPM-4Relay modules via RS-485, allowing management of up to 128 channels. Ethernet & Wi-Fi ConnectivitySupports both wired (RJ45) and wireless (Wi-Fi 2.4GHz) internet connections for stable cloud access. Real-time Energy MonitoringWhen paired with SPM-4Relay, it collects voltage, current, power, and energy consumption data from each channel. Local Data StorageSupports microSD card (up to 256GB) to securely store historical energy data—no data loss even if disconnected from the internet. Overload & Short-Circuit ProtectionSends alerts and can automatically shut down circuits to protect devices and wiring. Remote Control & Cloud ManagementManage all relay modules, view reports, and automate circuits using the eWeLink app or web dashboard. DIN Rail Industrial DesignMounts neatly inside electrical control cabinets or distribution boxes. Technical Specifications Specification Details Model SONOFF SPM-Main Communication RS-485 to SPM-4Relay (Max 32 Modules / 128 Channels) Network Wi-Fi IEEE 802.11 b/g/n (2.4 GHz), RJ45 Ethernet Power Supply 100–240V AC, 50/60 Hz Data Storage microSD Card (Max 256GB) Compatible Module SONOFF SPM-4Relay App Support eWeLink (iOS / Android) Protection Features Overload, Short-Circuit Alerts Installation DIN Rail Mount Operating Temperature -10°C to +40°C Material Flame-retardant PC V0 Dimensions 143 × 90 × 66 mm Why Choose SONOFF SPM-Main? Central hub for professional energy management systemsControls up to 128 relay channels when paired with SPM-4RelayEthernet + Wi-Fi connectivity for stable remote accessEnergy monitoring, automation, and SD card data backupIdeal for smart buildings, apartments, offices, factories, vending machines, and commercial setups

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The SONOFF POWR3 is a powerful 25A smart switch designed to give you full control over high-power appliances and electrical systems. With advanced real-time energy monitoring, it allows you to track power consumption, optimize efficiency, and prevent potential overloads. Perfect for heavy-duty appliances such as water heaters, HVAC systems, and industrial equipment, the POWR3 provides reliable remote control through the eWeLink app. Its robust design ensures safe and stable operation under high loads, while scheduling, automation, and integration with smart home ecosystems allow you to create intelligent routines that enhance convenience, energy savings, and overall system protection. Lightweight and easy to install, the POWR3 is ideal for both home and professional applications requiring high-power smart control. Key Features High Power Capacity – Up to 25A / 5500WIdeal for high-load appliances such as water heaters, air conditioners, pumps, and industrial equipment. Real-Time Power MonitoringTrack voltage, current, active power, and total energy consumption directly via the eWeLink app. Energy History & Usage ReportsView hourly, daily, and monthly energy data to better manage electricity costs. Overload ProtectionAutomatically switches off if the connected device exceeds preset power, voltage, or current limits. Remote Control Anytime, AnywhereTurn connected appliances on or off through your smartphone using the eWeLink app. Voice Assistant SupportWorks seamlessly with Amazon Alexa and Google Assistant for hands-free voice control. DIN Rail Mounting OptionEasy to install in distribution boxes or electrical panels for clean and professional setups. Strong and Safe BuildFlame-retardant PC V0 housing for durability and electrical safety. Technical Specifications Specification Details Model SONOFF POWR3 Input Voltage 100–240 V AC, 50/60 Hz Maximum Load 25A / 5500W Wireless Protocol Wi-Fi 2.4 GHz (IEEE 802.11 b/g/n) Energy Monitoring Voltage / Current / Power / kWh Display App-based power monitoring (no LCD) Protection Features Overload / Over-voltage / Over-current App Support eWeLink (iOS & Android) Voice Control Amazon Alexa / Google Assistant Installation DIN rail mountable / surface mounting Material Flame-retardant PC V0 Dimensions (Approx.) 162 × 122 × 45 mm Why It’s a Great Choice The SONOFF POWR3 is designed for users who need powerful smart control with reliable energy tracking. Whether for homes, workshops, or small businesses, it delivers accuracy, safety, and smart automation for high-consuming devices.

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The SONOFF POWR316 is a 16A smart switch designed to enhance home or business power management with precise control and monitoring. Equipped with real-time energy tracking and advanced protection features, it allows you to safeguard appliances, prevent overloads, and optimize energy usage. The built-in LCD screen provides instant feedback on voltage, current, and power consumption, while integration with the eWeLink app enables remote control, scheduling, and automation. Ideal for managing lights, heaters, pumps, and other high-power devices, the POWR316 combines compact design, reliable performance, and smart automation to simplify energy management and improve efficiency in any environment. Key Features Real-Time Power Monitoring with LCD DisplayInstantly view voltage, current, power consumption, and total kWh directly on the screen. 16A High Power CapacitySupports up to 16A, making it suitable for air conditioners, heaters, water pumps, and other high-power appliances. Energy History & Data ExportMonitor daily, weekly, and monthly electricity usage and export records for analysis anytime via the eWeLink app. Overload ProtectionAutomatically turns off the connected device if power, voltage, or current exceeds your preset safety limits. Remote App ControlTurn devices on or off anytime using the eWeLink app — no matter where you are. Voice Control CompatibleWorks smoothly with Amazon Alexa and Google Assistant for hands-free control. Wi-Fi + LAN SupportReliable cloud connectivity with offline LAN mode for stable local control. Durable & Safe BuildMade of flame-retardant PC V0 material for added safety and long-term performance. Technical Specifications Specification Details Model SONOFF POWR316 (POW Elite 16A) Input Voltage 100–240 V AC, 50/60 Hz Maximum Load 16A (up to 3500W) Wireless Connection Wi-Fi 2.4 GHz (IEEE 802.11 b/g/n) Display Built-in LCD screen Power Monitoring Voltage / Current / Power / kWh Data History Energy usage tracking & export Protection Features Overload / Over-current / Over-voltage App Support eWeLink (iOS & Android) Voice Control Amazon Alexa / Google Assistant Material Flame-retardant PC V0 Installation DIN-rail mountable or standalone Dimensions (Approx.) 98 × 54 × 31 mm Why You'll Love It The SONOFF POWR316 is the perfect choice for anyone who wants to control, monitor, and protect electrical appliances with ease. Whether you're managing smart home devices or optimizing energy usage in your business, this device gives you precision, safety, and convenience in one smart package.

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The SONOFF POWR320D, part of the POW Elite series, is a high-performance smart switch designed to upgrade power monitoring and control in your home or business. It provides real-time energy monitoring, allowing you to track power consumption, set safety thresholds, and analyze usage history directly from your smartphone. With a high load capacity, it is suitable for heavy-duty appliances, ensuring safe and reliable operation. Remote control via the eWeLink app, combined with scheduling and automation capabilities, enables intelligent management of devices for improved energy efficiency and convenience. Compact, durable, and easy to install, the POWR320D offers precise, hands-on control for professional and residential applications alike. Key Features Real-Time Power Monitoring with LCD DisplayView voltage, current, power, and cumulative energy usage instantly on the built-in LCD display.  High Load Capacity — Up to 20 ASuitable for larger appliances and circuits, supporting up to 20 A of load.  6-Month Consumption History & Exportable DataTrack hourly usage up to 6 months, and export data for analysis.  Overload, Over-Current and Over-Voltage ProtectionSet thresholds and have the device automatically shut off if limits are exceeded — helping protect your appliances and wiring.  Remote Control & Smart Home IntegrationUse the eWeLink app to control or monitor devices; supports Amazon Alexa & Google Assistant voice control.  LAN & Wi-Fi ConnectivityOffers reliable Wi-Fi connection and supports local area network (LAN) mode for advanced control. Compact & Reliable BuildDesigned to fit into standard switch boxes; flame-retardant PC V0 material for safety.  Technical Specifications Specification Details Model POWR320D (POW Elite) Input/Output Voltage 100–240 V AC, 50/60 Hz Maximum Load 20 A (resistive load) Wireless Protocol Wi-Fi IEEE 802.11 b/g/n (2.4 GHz) Display LCD (voltage, current, power & energy) History Data Retention Up to 6 months (hourly resolution) Protection Features Overload, over-current, over-voltage Material Flame-retardant PC V0 Dimensions Approx. 98 × 54 × 31 mm  Supported Platforms eWeLink app, Amazon Alexa, Google Assistant Why Choose SONOFF POWR320D? If you’re looking for a smart switch that not only controls your power but also monitors it in real time, the SONOFF POWR320D delivers. With its 20 A capacity, built-in LCD metrics, comprehensive app control, and safety features, it’s perfect for smart homes that need reliable power management, smart automation, and energy savings.

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The SONOFF POWCT 100A is a professional clamp-on current transformer designed for accurate and safe smart energy monitoring in homes, offices, and industrial environments. Capable of measuring current up to 100A, it enables detailed tracking of electricity usage without direct contact with live wires, ensuring easy installation and enhanced safety. The POWCT 100A works seamlessly with SONOFF POW R2, SPM-Main, and the eWeLink app, allowing real-time monitoring, overload detection, and detailed energy analysis. By providing precise consumption data, it helps users optimize energy usage, prevent electrical issues, and improve overall efficiency. Durable, reliable, and suitable for high-load systems, the POWCT 100A is an essential component for professional-grade smart energy management. Key Features Accurate Current MonitoringMeasures AC current up to 100A, allowing precise energy tracking. Compatible with SONOFF DevicesWorks with SONOFF POW R2, SPM-Main, or similar eWeLink-compatible modules for real-time monitoring. Remote Monitoring via eWeLink AppTrack electricity usage and device performance remotely through your smartphone (iOS & Android). Overload Detection & AlertsProtects connected devices by sending alerts when current exceeds safe limits. Easy InstallationSimply clamp around a wire — no rewiring required. Compact and safe. Smart Automation SupportIntegrates with eWeLink scenes, schedules, and automation rules to control connected devices based on current usage. Ideal for Homes & Commercial UseSuitable for energy monitoring of lighting circuits, appliances, pumps, and industrial equipment. Technical Specifications Specification Details Model SONOFF POWCT 100A Measurement Type AC Current Clamp (Current Transformer) Max Current 100A Operating Voltage Compatible with 100–240V AC circuits App Support eWeLink (iOS / Android) Integration SONOFF POW R2, SPM-Main, eWeLink scenes Installation Clamp-on wire (No rewiring required) Operating Temperature -10°C to +50°C Dimensions 90 × 56 × 23 mm Material Flame-retardant PC Why Choose SONOFF POWCT 100A? Monitor AC current up to 100A accuratelyIntegrates with SONOFF smart devices and eWeLink appDetect overloads and receive alerts for safe operationEasy clamp-on installation, no rewiring requiredIdel for homes, offices, industrial circuits, and energy management projects

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