---
product_id: 278517579
title: "S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Timer Switch ETL Certified, Compatible with Alexa & Google Home, IFTTT Supporting, 2.4 Ghz Wi-Fi Only"
brand: "sonoff"
price: "€ 13.40"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.pt/products/278517579-s31-wifi-smart-plug-with-energy-monitoring-15a-smart-outlet
store_origin: PT
region: Portugal
---

# 15A max current 100 days energy monitoring App & voice control S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Timer Switch ETL Certified, Compatible with Alexa & Google Home, IFTTT Supporting, 2.4 Ghz Wi-Fi Only

**Brand:** sonoff
**Price:** € 13.40
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your smart lifestyle with precision and ease!

## Quick Answers

- **What is this?** S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Timer Switch ETL Certified, Compatible with Alexa & Google Home, IFTTT Supporting, 2.4 Ghz Wi-Fi Only by sonoff
- **How much does it cost?** € 13.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/278517579-s31-wifi-smart-plug-with-energy-monitoring-15a-smart-outlet)

## Best For

- sonoff enthusiasts

## Why This Product

- Trusted sonoff brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Smart Setup:** Plug in, pair via eWeLink app, and control your home in minutes.
- • **Customizable Scheduling:** Set timers and schedules to automate your devices and save energy.
- • **Precision Energy Insights:** Track real-time power, voltage, and current with 100 days of usage data.
- • **Certified Safety Assurance:** ETL, FCC, and RoHS certified for secure, reliable smart home integration.
- • **Voice-Activated Convenience:** Seamlessly works with Alexa & Google Home for hands-free control.

## Overview

The SONOFF S31 WiFi Smart Plug is a compact, ETL-certified smart outlet supporting up to 15A and 1800W. It offers real-time energy monitoring with 100 days of data storage, remote app control via eWeLink, and voice compatibility with Alexa and Google Home. Designed for 2.4 GHz Wi-Fi networks, it enables customizable scheduling and overload protection, making it a secure and efficient addition to any smart home.

## Description

Product Description SONOFF S31 WiFi Smart Plug - Enjoy your smart home life. App Download : Search on App store, eWeLink, or Scan the Qr code on the User Manual and install it. Easy to Set Up - Works with App Step 1: Download eWeLink App; Step 2: Plug the Smart Wi-Fi Plug into any outlet; Step 3: Configure Smart Wi-Fi Plug preferences on eWeLink App. Power Consumption Monitoring Keep track of real-time power, current and voltage of your appliances and reports on eWeLink APP. Overload Protection Set threshold value including power, current and voltage to ensure devices work securely. Certified Safe ETL/FCC/RoHS certificated – Secure and guaranteed SONOFF S31 WiFi Smart Plug works with your existing home Wi-Fi (2.4 GHz band) Technical Specifications Model Number: S31 WiFi Requirement: 2.4Ghz Only Rated Voltage: 120V Rated Current: 15A Max Ac Frequency: 2.4 Ghz Max power: 1800W Note: The maximum power changed as the local voltage.

## Features

- Simple Setup and Use: plug in, open eWeLink APP, click the "+" in the upper right corner to pairing, and get started in minutes.
- Voice Control – Works with desertcart Alexa and Google Home to start a voice-controlled home.
- APP Remote Control: Manage electronic devices from anywhere.
- Set Schedule or Timer: Create schedules to turn plugs on and off at specific times.User will control their decoration lights via timer functions.
- Power Consumption Monitoring: Keep track of real-time power, current and voltage of your appliances and reports on APP; Store 100 days of electricity usage data and total electricity cost.
- Secure and Guaranteed: ETL/FCC/RoHS certificated.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Connector Type | Plug in |
| Number Of Poles | 3 |
| No. of wires | 3 |
| Plug Format | Type B |
| Specification Met | Etl, Fcc, Rohs |
| Amperage | 15 Amps |
| Manufacturer | SONOFF |
| Part Number | S31 |
| Item Weight | 3.2 ounces |
| Product Dimensions | 3 x 1.57 x 1.3 inches |
| Item model number | S31 |
| Style | S31 |
| Wattage | 1800 watts |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Included Components | 15A Smart Outlet Socket ETL Certified, Work with Alexa & Google Home |
| Batteries Required? | No |
| Warranty Description | 1 Year Warranty. |

## Product Details

- **Brand:** SONOFF
- **Color:** White
- **Voltage:** 120 Volts (AC)
- **Product Dimensions:** 1.57"D x 3"W x 1.3"H
- **Material:** Polycarbonate (PC)

## Images

![S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Timer Switch ETL Certified, Compatible with Alexa & Google Home, IFTTT Supporting, 2.4 Ghz Wi-Fi Only - Image 1](https://m.media-amazon.com/images/I/51HPDgFpi4L.jpg)

## Questions & Answers

**Q: Estos plugs vienen en su caja original?**
A: SI estos plugs vienen en su caja original

**Q: Does this resume a timer schedule after a power failure?**
A: Yes it can resume a set power state and keeps it's custom timer settings.

**Q: Can this send me a notification if the energy or power reaches below or above a certain level?**
A: Yes. I flash all my s31s with ESPHome so i can use them with Home Assistant (you can use them with HA without flashing them, but they dont work reliably w/ the stock cloud-connected software, at least not reliably enough for switching power on/off). I then use Node Red in HA to read the power consumption in watts and send me a message via Telegram if a condition is met. Works great to remind me to turn off my home entertainment equipment before bed. Also works to alert me when the washing machine is done.

**Q: Does this resume a timer schedule after a power failure?**
A: Yes, because the timer program is based on cell phone app. The sonoff is just a wifi relay commanded by app.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for flashing to ESPHome
*by D***K on June 5, 2025*

This is a great power monitoring smart plug if you are willing to flash ESPHome to "uncloud" it. This turns it into a locally controlled device that does not "call home" or require proprietary apps to function. Easy to take apart and reassemble after modding. Fixes many of the pain points described by other reviewers (poor WiFi, app pairing issues). Otherwise for the sake of privacy you are better off with a Zigbee model like the S31 Lite.

### ⭐⭐⭐⭐⭐ Great smart plug and power meter
*by J***N on September 2, 2025*

Great little smart plugs, and very useful for tracking power usage too.

### ⭐⭐⭐⭐⭐ Works exactly as expected
*by S***D on July 7, 2025*

This took me a total of 2 minutes in order to set up the device, connect a freezer to it and then see the power consumption of the freezer. I was then is able to easily connect it to home assistant through the sonoff integration. And then created automations to make sure that the device was always on and that the power consumption was over a certain amount over a given period of time to verify that the freezer was always working. This is super easy and a convenient way for me to verify that the contents within the freezer will stay good even if I am not at home. Highly recommend this device.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.pt/products/278517579-s31-wifi-smart-plug-with-energy-monitoring-15a-smart-outlet](https://www.desertcart.pt/products/278517579-s31-wifi-smart-plug-with-energy-monitoring-15a-smart-outlet)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-24*