---
product_id: 470316575
title: "SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D"
brand: "sonoff"
price: "R$497"
currency: BRL
in_stock: true
reviews_count: 13
category: "Sonoff"
url: https://www.desertcart.com.br/products/470316575-sonoff-wifi-smart-power-meter-switch-20a-smart-switch-power
store_origin: BR
region: Brazil
---

# 20A max load for heavy-duty devices 6-month hourly power consumption data Remote control via eWelink & Alexa SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D

**Brand:** sonoff
**Price:** R$497
**Availability:** ✅ In Stock

## Summary

> ⚡ Empower your smart home with real-time energy mastery!

## Quick Answers

- **What is this?** SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D by sonoff
- **How much does it cost?** R$497 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/470316575-sonoff-wifi-smart-power-meter-switch-20a-smart-switch-power)

## 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

- • **Advanced Safety Features:** Customizable overload protection thresholds safeguard your devices and give you peace of mind.
- • **Robust 20A Load Capacity:** Supports up to 5000W, handling high-power appliances with ease and reliability.
- • **Precision Energy Insights:** Track real-time power, voltage, and current on a crisp LCD display for smarter energy decisions.
- • **Long-Term Consumption Analytics:** Access detailed 6-month hourly usage data exportable to Excel—perfect for optimizing your home’s energy footprint.
- • **Seamless Smart Home Integration:** Works flawlessly with Alexa, eWelink app, and IFTTT for voice commands and automated schedules.

## Overview

The SONOFF WiFi Smart Power Meter Switch POWR320D is a high-capacity 20A smart switch featuring an LCD screen that displays real-time power, voltage, and current metrics. It stores up to 6 months of hourly energy consumption data, exportable for detailed analysis. Compatible with Alexa, eWelink app, and IFTTT, it offers remote control, voice commands, and smart scheduling. Enhanced with overload protection and powered by an upgraded ESP32 chip, it delivers faster, safer, and smarter home energy management.

## Description

SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D : desertcart.co.uk: DIY & Tools

Review: Works great for monitoring Solar Panel input - I purchased this Sonoff Power Monitor on a hunch as i couldn't find any information on it to see if it would work in a bidirectional way - ie to monitor wattage going in rather than out. I have a few sonoff products around my home and always find them to be great pieces of technology that work just how they are suppose too. You need to have the eWelink app installed to get the most out of these device, the app is free and easy to download. Connecting up this device was a breeze there are very decent quality connectors for you Live and Load inputs, and installation only took around 5 mins. Unfortunately as with all sonoff products i own there is no earth connector so i had to make my own. Once powered up i was extremely pleased to see that it was indeed bidirectional and measured the wattage and ampage coming in from my solar array. Checking the app i was able to watch the wattage from the panels increase as more sunlight hit the panels. The only thing that didn't work was the wattage as this displayed the grid wattage rather than the solar voltage, but Watts and Amps worked great. Remote control of the device was also great, i was able to switch on and off the mains portion of the device without issue from the device and the app. For standard appliance use, you can not go wrong with this energy monitor - it seems to be very accurate and will feed the data directly into the app, or you can just look at the LCD display - i do wish there was a backlight on the display as it was at times hard to read. Love this device! Recommended product! I hope that you found my review helpful.
Review: Works fine once flashed with Tasmota - First off, the Sonoff firmware is awful - you need a app, the device needs to be on the same logical network as your app and it's horribly clunky to set up. Luckily it's really easy to open up and flash with different firmware - I put Tasmota on and after a short while teying to work out how to make the relay work (it's bistable), it works perfectly and I tegrates with my HA system perfectly.

## Features

- 【Smart Power Meter Switch】 SONOFF WiFi Smart Power Meter Switch is a smart switch with the LCD screen show the Power and Energy Monitoring function, this wifi switchs comes with the remote control /voice control/ smart scheduled functions, is compatible with Alexa/ eWelink APP&Web/ IFTTT, This smart switch size is 98x54x31mm, maxload is 20A 5000W.
- 【LCD Screen】 The WiFi Smart Power Meter Switch have a LCD screen, which can display the power, current, voltage, and cumulative power consumption of your appliances, which can help you manage energy for DIY smart home better.
- 【6-Month Consumption History Data by Hour】 The WiFi Smart Power Meter Switch is support store the power consumption data (accurate to hours) up to 6 months which can be exported to excel on your phone, is convenient for you to know the appliance consumption data.
- 【Overload Protection】You can set power, current, and voltage threshold. Once any condition is met, the POW Elite will be turned off to protect your appliances.
- 【Fully Functional】 The WiFi Smart Switch is use the new upgrated ESP32 Chip, enables the speed is 50% higher than the ESP8622 chip. Also, the other smart switch support basic functions such as App control, voice control, LAN control, timing schedule, inching setting, this WiFi Smart Switch is also support.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09XB3RZB9 |
| Batteries required | No |
| Best Sellers Rank | 41,528 in DIY & Tools ( See Top 100 in DIY & Tools ) 18 in Power Monitors |
| Customer Reviews | 4.4 4.4 out of 5 stars (660) |
| Date First Available | 6 April 2022 |
| Item model number | POWR320D |
| Item weight | 140 Grams |
| Product Dimensions | 1 x 1 x 1 cm; 140 g |

## Product Details

- **Brand:** SONOFF
- **Connector type:** Screw
- **Contact type:** Normally Closed
- **Current rating:** 15 Amps
- **Item dimensions L x W x H:** 10 x 10 x 10 millimetres
- **Material:** Polycarbonate
- **Operating voltage:** 240 Volts
- **Operation mode:** Automatic
- **Switch type:** Smart Switch
- **Terminal:** Through Hole

## Images

![SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D - Image 1](https://m.media-amazon.com/images/I/51x12dc-y7L.jpg)

## Questions & Answers

**Q: Is this only accessible through an app? i want to get to the interface by entering an ip address into a web browser. thanks.**
A: Not quite sure ! Yes works well through the app which I use. Have read that you can access certain items via ifttt and a raspberry pi.Ewelink do do a Web interface on PC but you have to pay for it! .

**Q: No earth terminal? i want to use the sonoff switch for my immersion but it looks like there is no earth terminals. any solutions? uk type wiring**
A: Mount an adaptable box (4x4”)  below the sonOff take all cables through this box to the sonOff and leave the earths in the box joined in a connector.

**Q: Is this suitable to connect directly to an immersion water heater from a switched spur?**
A: I've been using the 20A model for the last month and a bit with my immersion heater.

Keep in mind:
1) I'm not an expert on the IET wiring regulation.
2) These new models do not have any built in cable clamping on the cables insulation. This is going to leave some risk of live cables accidentally getting pulled out. I've added external cable clamps to mitigate this risk. 
3) The flex to the immersion heater should be the heat resistant type. 
4) Normal practice is to have an immersion heater on its own dedicated circuit back to the fuse box. This ensures there is no chance of overloading the cables. I think you are allowed to run off a spur but the 13A current for the heater is going to be using nearly all the spurs capacity of 16A. So no sharing with anything else.
5) The 20A model is only a few pounds extra, can't hurt to have a more robust relay switching the current and in life the less you push things to their limit the longer they tend to last.

**Q: does it work without a smart meter?**
A: Yes. It’s simply a mains voltage power monitor. I have mine between the grid tie inverter and the socket I have back fed into. Works very well. I had some trouble pairing it but eventually it worked. Very handy seeing the solar power being fed into the house in real time.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great for monitoring Solar Panel input
*by T***D on 23 October 2022*

I purchased this Sonoff Power Monitor on a hunch as i couldn't find any information on it to see if it would work in a bidirectional way - ie to monitor wattage going in rather than out. I have a few sonoff products around my home and always find them to be great pieces of technology that work just how they are suppose too. You need to have the eWelink app installed to get the most out of these device, the app is free and easy to download. Connecting up this device was a breeze there are very decent quality connectors for you Live and Load inputs, and installation only took around 5 mins. Unfortunately as with all sonoff products i own there is no earth connector so i had to make my own. Once powered up i was extremely pleased to see that it was indeed bidirectional and measured the wattage and ampage coming in from my solar array. Checking the app i was able to watch the wattage from the panels increase as more sunlight hit the panels. The only thing that didn't work was the wattage as this displayed the grid wattage rather than the solar voltage, but Watts and Amps worked great. Remote control of the device was also great, i was able to switch on and off the mains portion of the device without issue from the device and the app. For standard appliance use, you can not go wrong with this energy monitor - it seems to be very accurate and will feed the data directly into the app, or you can just look at the LCD display - i do wish there was a backlight on the display as it was at times hard to read. Love this device! Recommended product! I hope that you found my review helpful.

### ⭐⭐⭐⭐⭐ Works fine once flashed with Tasmota
*by G***R on 16 January 2024*

First off, the Sonoff firmware is awful - you need a app, the device needs to be on the same logical network as your app and it's horribly clunky to set up. Luckily it's really easy to open up and flash with different firmware - I put Tasmota on and after a short while teying to work out how to make the relay work (it's bistable), it works perfectly and I tegrates with my HA system perfectly.

### ⭐⭐⭐⭐ Works Well
*by J***F on 17 December 2025*

Works well. Easy to install, easy to set up. Instructions not clear but it’s quite intuitive. Paired with Alexa means this is properly smart, and I don't have to rely on eWeLink App. Only issue I have is that the terminals are not completely enclosed and the wires, while secure still feel quite exposed. Will likely end up enclosing somehow to prevent curious kids from accidentally frying themselves.

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-24*