Product Overview

Introduction

Product Name	SONOFF POWR3 Smart Power Meter Switch
Product Model	POWR3

This device is a high-power (25A) smart switch with energy consumption tracking functionality. The product is designed for DIN rail installation on the back. You can control devices connected to your home through your smartphone, whether at home or on the go. It allows you to set timers to turn devices on/off, share control with your family members, and more.

Highlights

• Monitor Device Power Anytime

Start or stop power measurement anytime. Control remotely and view data through your phone, without any environmental restrictions!

• Join to Alexa Energy Dashboard to Track and Save on Energy Usage

POWR3 supports Alexa smart energy, which is dedicated to better help you save energy usage. You can centrally view the overall or individual device energy consumption in the dashboard.

• Overload Protection

Overload protection will not be affected by the network to monitor the voltage, current, and power of loads at all times. Once an abnormality is detected, the power will be cut off to avoid device damage and danger.

• Normally Closed Relay

POWR3's relay is normally closed, which means the relay remains closed when there is no power applied or the device is damaged. Even if POWR3 is damaged, the circuit is not affected. Other products’ relays are normally open. Of course, the power-on status can be set to on, off, or hold through the APP.

• Timer & Schedule

Create personalized schedules and countdowns to automatically control your appliances based on your routine.

Applications

• Energy Efficiency for Small Businesses

Use POWR3 to optimize power usage in offices, workshops, or small commercial setups—monitor peak usage times and reduce standby losses.

• etc...

Specification

Model	POWR3
MCU	ESP8266
Input	100-240V~ 50/60Hz
Max. Load	25A/5500W
Gang	1-Gang
Wireless Connectivity	IEEE 802.11 b/g/n 2.4GHz(2400M-2483.5M)
Net Weight	490g
Dimension	162x122x45.5mm
Color	White
Casing Material	PC V0
Applicable Place	Indoor
Working Temperature	-10℃~40℃
Working Humidity	5%~95% RH, non-condensing
Certified Compliance	CE/FCC/UKCA/ROHS

eWeLink Key Features

Device Home Page Functions​
Key Features	Feature Description
Open/Close Device	Control the on/off of the load.
​Energy Monitoring	Real-time current/voltage/power monitoring. Calculate the total electricity consumption and total electricity charges for the past four months, as well as the daily electricity consumption within these four months. Manually monitor the electricity consumption within a certain period of time.
Smart Timer	Scheduled On/Off. Countdown Timer. Recurring on-off loops.

 

Device Settings
Key Features		Feature Description
Assign Location		Set up the home and room where the device is located.
Share Device		The device can be shared with other eweLink accounts.
Third-party Platforms (Add the device to the eWeLink app via the SONOFF gateway, then sync it to the corresponding third-party platform through account linking.) ​ ​ ​ ​ ​ ​ ​ ​ ​	Alexa	voice control(open/close)
	Google Home	voice control(open/close)
	IFTTT	voice control(open/close)
	SmartThings	voice control(open/close)
	Alice	voice control(open/close)
	Salute	voice control(open/close)
Group Control		After multiple devices are created into a group, you can synchronize all devices in the group.
Smart Scene		Trigger condition: open/close. Execution action: open/close.
Electricity Tariff Rate		Users can automatically calculate and display the daily electricity cost of devices connected to the socket based on the local electricity rate.
OPS		When the Load Parameters exceed the set threshold, power is cut off to the device, and remote power restoration is supported.
Push Notifications		Push the device's on/off status and power consumption to the user.
LAN Control		A control method where the app communicates directly with the device over the same router, without going through the cloud platform. On/Off
Offline Alert		Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline. On/Off
Logs		Records of device status changes. (You can view the operation records of the past three months.)
Power-on State		The device automatically turns off/turns on after being on for a specified duration.
Inching Settings		The device automatically turns off/turns on after being on for a specified duration.

Installation and Configuration Guide

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① Restart Button

② Paring button/Physical switch

Paring button/Physical switch	Device Status
Press & hold 5 seconds	Device enters the pairing mode

③ Wi-Fi LED indicator (Blue)

Wi-Fi LED indicator (Blue)	Device Status
Keeps on	Online
Flashes two short + one long	Quick Pairing Mode
Flashes Quickly	Compatible Pairing Mode
Flashes once	Failed to connect to the router
Flashes twice	Connected to the router but failed to connect to the server
Flashes three times	OTA

Power off

Warning: Please install and maintain the device by a professional electrician. To avoid electric shock hazards, do not operate any connection or contact the terminal connector while the device is powered on!

Wiring Diagrams

Note: Please install and maintain the device by a professional electrician. To avoid electric shock hazard, do not operate any connection or contact the terminal connector while the device is powered on! Make sure all wires are connected correctly.

External Switch Type	Wiring Diagram for Lighting	Wiring Diagram for Electrical Appliances
Wire Diagrams

Download App

Please download the "eWeLink" App from Google Play Store or Apple App Store.

 

Add Device

FAQ

1. Fail to pair Wi-Fi devices with the eWeLink APP :

①Make sure the device is in pairing mode. The device will automatically exit the pairing mode if not paired within 3 minutes.

②Please turn on the location service on your mobile phone and give permission. Before choosing the Wi-Fi network, the location service should be turned on, and permission should be given. Location information permission is used to obtain Wi-Fi list information. If you tap "Disable", the device will not be added.

③Make sure your Wi-Fi network runs on the 2.4GHz band.

④Make sure you entered a correct Wi-Fi SSID and password, with no special characters contained. A wrong password is a very common reason for pairing failure.

⑤You may get the device close to the router for a good signal transmission while pairing. 6. Please try to pair the device in the compatible mode.

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2. Wi-Fi devices "Offline" issues:

Please check the following issues by the Wi-Fi LED indicator status: The LED indicator blinks once every 2s means you fail to connect to the router.

①Maybe you entered the wrong Wi-Fi SSID and password.

②Make sure your Wi-Fi SSID and password don't contain special characters, for example, the Hebrew, Arabic characters. Our system can't recognize these characters, so that fails to connect to the Wi-Fi.

③Maybe your router has a lower carrying capacity.

④Maybe the Wi-Fi signal strength is weak. Your router is too far away from your device, or there may be some obstacles between the router and the device so that the signal transmission is blocked.

⑤Be sure that the MAC of the device is not on the blacklist of your MAC management.

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3. The LED indicator flashes twice on repeated means you fail to connect to the server. 

①Make sure the Internet connection is normal. You can use your phone or PC to connect to the Internet, and if you fail to access, please check the availability of the Internet connection.

②Maybe your router has a low carrying capacity. The number of devices connected to the router exceeds its maximum value. Please check the maximum number of devices that your router can carry. If the number of connected devices exceeds the maximum value, please delete some devices or change to a larger router and try again.

③Please contact your ISP and confirm our server address is not shielded: cn-disp. coolkit.cc (China Mainland) as-disp. coolkit.cc (in Asia except China) e u-disp. coolkit.cc (in EU) us-disp. coolkit.cc (in US) If none of the above methods solved this problem, please submit your issue via help & feedback on the eWeLink App.

Troubleshooting

1. Voltage, Current, and Power Data Not Updated in Real-Time

The device checks data every 2 seconds. Data is reported only if the current exceeds 0.03A, the voltage exceeds 5V, or the power exceeds 2W. Therefore, updates to the data will only appear on the app once these conditions are met.

2. Historical Power Consumption Data May Appear Smaller

The device saves power data every half hour. If there is a power outage, data for that half hour will be lost. As a result, when you open the app and request data, the values returned by the device may appear smaller than previously seen.

3. Why Can't Voltage, Current, and Power Values Be Used as Trigger Conditions in a Scenario (e.g., in IFTTT)?

Currently, the device's data reporting mechanism works as follows:
Once the details page is opened, the app gives the device 60 seconds. During this time, any significant changes will trigger data reporting. As long as the app's process is not killed, this 60-second window will continue. However, if the app's process is killed, the device will stop reporting data after the valid time has passed.

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