---
product_id: 517446549
title: "Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener"
brand: "shelly"
price: "35540₫"
currency: VND
in_stock: false
reviews_count: 8
url: https://www.desertcart.vn/products/517446549-shelly-plus-1-ul-wifi-smart-relay-switch-with-dry
store_origin: VN
region: Vietnam
---

# 15A max current WiFi + Bluetooth gateway Dry contact relay Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener

**Brand:** shelly
**Price:** 35540₫
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Upgrade your smart home game with the relay that plays by your rules!

## Quick Answers

- **What is this?** Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener by shelly
- **How much does it cost?** 35540₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/517446549-shelly-plus-1-ul-wifi-smart-relay-switch-with-dry)

## Best For

- shelly enthusiasts

## Why This Product

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

## Key Features

- • **Dual Connectivity Hub:** Seamlessly integrates via WiFi and Bluetooth—no hub required, total freedom.
- • **Universal Dry Contacts:** Voltage-agnostic switching for ultimate flexibility across appliances.
- • **Compact & Retrofit-Ready:** Fits behind any wall switch or socket—install in under 10 minutes, no renovation needed.
- • **Powerful 15A Relay Control:** Handles high loads effortlessly for all your home and office devices.
- • **Privacy-First Smart Automation:** Operate fully offline or cloud-connected with zero forced updates or spying.

## Overview

Shelly Plus 1 UL is a UL-certified, compact smart relay switch delivering 15A load control with dry contacts for versatile voltage compatibility. It doubles as a WiFi repeater and Bluetooth gateway, enabling seamless integration with Alexa, Google Home, SmartThings, and Home Assistant—all without requiring a hub or cloud dependency. Designed for easy retrofit installation behind wall switches, it empowers you to automate legacy appliances, garage doors, and irrigation systems with secure, privacy-respecting remote control and customizable automation.

## Description

desertcart.com: Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener : Industrial & Scientific

Review: Great "dry contact" smart relay, UL listed, integrates perfectly with Home Assistant - Bottom Line Up Front: These are high-quality smart relays made by a reputable company. They provide "dry contacts" (that is, they simply connect or disconnect the wires connected to the switched terminals. They do not connect the relay terminals to line voltage. The switched terminals are fully isolated from the line voltage that powers the relay.) which are useful for switching both low-voltage and line (120V or 240V AC) voltage circuits. They do not require any network access, and can be configured using the device's built-in WiFi access point or Bluetooth connection using the Shelly app or built-in webserver. You can also control the relay with a separate switch, like a regular light switch or pushbutton switch, which allows you to control loads with higher current or voltage than your switch could handle. You optionally can use the free Shelly cloud service and/or integrate it into a variety of smart home systems like Home Assistant. This model is UL listed, which means it has been tested by a third-party testing laboratory for electrical and fire safety and has passed those tests. I recommend them. Background: My house occasionally gets power outages, and also has rooftop solar and Tesla Powerwalls (to provide whole-house backup power). I wanted to ensure that my central air conditioner and electric vehicle charger would switch off when there was an outage and the batteries had been discharged to 50% or less, but neither the AC nor the charger were "smart" devices that could play nicely with my Home Assistant installation at home. Power: The relays can be powered with 120-240V AC mains power, 24-60V unregulated DC (the relay has an internal regulator), or 12V DC from a voltage-regulated power supply. Terminals: The relays have screw-type terminals that can support stranded or solid wire up to 14 AWG size (12 AWG will not fit). The manual recommends solid wire, but I've found that stranded wire with crimped ferrules work extremely well and do not loosen with time. Installation: My AC has "utility curtailment" terminals that are intended for an electric utility-provided device to signal the AC to turn off for short periods of time when the electric grid is overloaded. The AC's terminals required a dry contact relay to signal when the AC should turn off or on, which these Shelly relays have. I simply powered the Shelly using the 240V connectors in the AC unit (I added 1A fuses to the wires powering the Shelly for safety) and connected wires from the relay terminals to the AC's utility curtailment terminals. After connecting the the Shelly relay to my home's WiFi network and adding it to my Home Assistant server, I configured some Home Assistant automations to turn the relay off when the power was out and the Powerwalls were <50% full. For my car charger, I installed a Shelly relay in a similar way, except I connected the charger's "control pilot" wire to the relay terminals. When the Shelly relay is on, the charger works as expected. When the relay is off, the car and charger both detect the loss of the pilot signal and immediately stop charging and the charger opens it's high-current contactor to make the plug connector electrically safe. As far as both car and charger are concerned, the charging plug was simply disconnected. Integration with Home Assistant: Home Assistant supports these relays natively, including a bunch of useful properties like the device's internal temperature, detecting and installing firmware updates, state of the relay and the input switch terminal, and others. Integrating them with Home Assistant is a cinch. Standalone Use: When first connected, the relays operate in a "standalone" mode where each creates its own WiFi access point to which you must connect in order to configure and use them. This access point can be disabled or secured at your option. You can connect to the relay's built-in web interface or use the Shelly app to configure the device, change any communication methods (turning the access point on or off, connecting to a different WiFi network, enabling Bluetooth control, etc.). You can configure the relay with schedules, responses to certain actions, and so on. The web interface and app are both intuitive, easy to understand, and have many useful options and settings one can change. Connectivity: It is possible to use this relay with no WiFi connectivity whatsoever if that is desired. Once configured, it's possible to have the device be completely standalone, be controllable locally using Bluetooth and/or it's standalone WiFI access point, or be connected to a WiFi network with or without internet access. No cloud service is required, nor is there any dependence on any outside service. That said, Shelly does offer a free cloud service to remotely access the relays if one wishes, but it is not required. Put simply: these are great relays that do what they're advertised to do, don't require any external connectivity, and integrate well with Home Assistant.
Review: Easy setup and high quality product - I've used a number of Shelly products in the past and am super happy with this UL-listed product. While I am not using this particular item to switch a light or otherwise, I am using it to send a message to my phone when a particular even occurs. Super easy to configure with this device and cheaper than many alternatives including some DIY solutions. It works great for this project, the size is perfect as well. I am looking forward to many years of service. Other uses of this product have been for automagically turning on a fan in my 3D printer and opening garage doors. Great products!

## Features

- Shelly Plus 1 UL is a UL-certified Wi-Fi operated smart relay switch with 1 channel, up to 15A that can also be used as a WiFi repeater and Bluetooth gateway. The device is equipped with potential-free outputs (dry contacts), providing high flexibility in voltage support and various applications. It can be used to control a wide range of home appliances, electrical circuits, and office equipment individually.
- Make any electrical appliance, garage door and irrigation system smart - No need to run additional cables, do unnecessary and expensive renovations or invest in smart appliances. You can now automate and control remotely every electrical appliance – even the old fan, room heater, pool system, door lock or doorbell, Garage Door and Irrigation System– with just a click or a shout.
- Safe and Easy to install - Small enough to fit behind every wall switch or wall socket, Shelly Plus 1 is retrofit and can be installed in less than 10 minutes. Enhanced safety and enhanced security MQTT and WSS support, TLS and custom certificates support.
- Shelly Customer Service - Shelly is one of the fastest-growing IoT brands in the world with devices, providing solutions for the automation of private homes, buildings and businesses. We provide our customers with professional support and a 3 years device warranty.
- Shelly Smart control app will help you control your Shelly devices remotely and will send notifications for all automated events in your home. You can easily configure devices and manage their settings individually, or you can create personalized scenes by combining Shelly devices to trigger certain actions in your home automation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWNFNXQ5 |
| Best Sellers Rank | #271,635 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #736 in Electrical Light Switches |
| Brand | Shelly |
| Brand Name | Shelly |
| Coil Resistance | 15 |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Contact Current Rating | 15 Amps |
| Contact Type | Normally Open |
| Current Rating | 15 Amps |
| Customer Reviews | 4.5 out of 5 stars 313 Reviews |
| Included Components | 1 x Shelly Plus 1 UL, User manual |
| Item Type Name | Smart relay switch |
| Item Weight | 27.22 g |
| Manufacturer | Allterco Robotics EOOD |
| Maximum Switching Current | 15 Amps |
| Maximum Switching Voltage | 12 Volts |
| Minimum Switching Voltage | 12 Volts |
| Model | 3800235265529 |
| Mounting Type | Wall Mount |
| Number of Terminals | 2 |
| Operation Mode | Automatic |
| Part Number | 529 |
| Smart Home Compatibility | Smart Home Compatible |
| Specification Met | UL |
| Unit Count | 1.0 Count |
| Wattage | 180 watts |

## Product Details

- **Connector Type:** Screw
- **Contact Type:** Normally Open
- **Current Rating:** 15 Amps
- **Mounting Type:** Wall Mount
- **Brand:** Shelly

## Images

![Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener - Image 1](https://m.media-amazon.com/images/I/81Shv2Oj4SL.jpg)
![Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener - Image 2](https://m.media-amazon.com/images/I/81+fm06GotL.jpg)
![Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener - Image 3](https://m.media-amazon.com/images/I/91KNuMpZ95L.jpg)
![Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener - Image 4](https://m.media-amazon.com/images/I/81jrTXVi+qL.jpg)
![Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener - Image 5](https://m.media-amazon.com/images/I/91n+7lxtIiL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great "dry contact" smart relay, UL listed, integrates perfectly with Home Assistant
*by P***. on August 29, 2024*

Bottom Line Up Front: These are high-quality smart relays made by a reputable company. They provide "dry contacts" (that is, they simply connect or disconnect the wires connected to the switched terminals. They do not connect the relay terminals to line voltage. The switched terminals are fully isolated from the line voltage that powers the relay.) which are useful for switching both low-voltage and line (120V or 240V AC) voltage circuits. They do not require any network access, and can be configured using the device's built-in WiFi access point or Bluetooth connection using the Shelly app or built-in webserver. You can also control the relay with a separate switch, like a regular light switch or pushbutton switch, which allows you to control loads with higher current or voltage than your switch could handle. You optionally can use the free Shelly cloud service and/or integrate it into a variety of smart home systems like Home Assistant. This model is UL listed, which means it has been tested by a third-party testing laboratory for electrical and fire safety and has passed those tests. I recommend them. Background: My house occasionally gets power outages, and also has rooftop solar and Tesla Powerwalls (to provide whole-house backup power). I wanted to ensure that my central air conditioner and electric vehicle charger would switch off when there was an outage and the batteries had been discharged to 50% or less, but neither the AC nor the charger were "smart" devices that could play nicely with my Home Assistant installation at home. Power: The relays can be powered with 120-240V AC mains power, 24-60V unregulated DC (the relay has an internal regulator), or 12V DC from a voltage-regulated power supply. Terminals: The relays have screw-type terminals that can support stranded or solid wire up to 14 AWG size (12 AWG will not fit). The manual recommends solid wire, but I've found that stranded wire with crimped ferrules work extremely well and do not loosen with time. Installation: My AC has "utility curtailment" terminals that are intended for an electric utility-provided device to signal the AC to turn off for short periods of time when the electric grid is overloaded. The AC's terminals required a dry contact relay to signal when the AC should turn off or on, which these Shelly relays have. I simply powered the Shelly using the 240V connectors in the AC unit (I added 1A fuses to the wires powering the Shelly for safety) and connected wires from the relay terminals to the AC's utility curtailment terminals. After connecting the the Shelly relay to my home's WiFi network and adding it to my Home Assistant server, I configured some Home Assistant automations to turn the relay off when the power was out and the Powerwalls were <50% full. For my car charger, I installed a Shelly relay in a similar way, except I connected the charger's "control pilot" wire to the relay terminals. When the Shelly relay is on, the charger works as expected. When the relay is off, the car and charger both detect the loss of the pilot signal and immediately stop charging and the charger opens it's high-current contactor to make the plug connector electrically safe. As far as both car and charger are concerned, the charging plug was simply disconnected. Integration with Home Assistant: Home Assistant supports these relays natively, including a bunch of useful properties like the device's internal temperature, detecting and installing firmware updates, state of the relay and the input switch terminal, and others. Integrating them with Home Assistant is a cinch. Standalone Use: When first connected, the relays operate in a "standalone" mode where each creates its own WiFi access point to which you must connect in order to configure and use them. This access point can be disabled or secured at your option. You can connect to the relay's built-in web interface or use the Shelly app to configure the device, change any communication methods (turning the access point on or off, connecting to a different WiFi network, enabling Bluetooth control, etc.). You can configure the relay with schedules, responses to certain actions, and so on. The web interface and app are both intuitive, easy to understand, and have many useful options and settings one can change. Connectivity: It is possible to use this relay with no WiFi connectivity whatsoever if that is desired. Once configured, it's possible to have the device be completely standalone, be controllable locally using Bluetooth and/or it's standalone WiFI access point, or be connected to a WiFi network with or without internet access. No cloud service is required, nor is there any dependence on any outside service. That said, Shelly does offer a free cloud service to remotely access the relays if one wishes, but it is not required. Put simply: these are great relays that do what they're advertised to do, don't require any external connectivity, and integrate well with Home Assistant.

### ⭐⭐⭐⭐⭐ Easy setup and high quality product
*by R***R on June 16, 2025*

I've used a number of Shelly products in the past and am super happy with this UL-listed product. While I am not using this particular item to switch a light or otherwise, I am using it to send a message to my phone when a particular even occurs. Super easy to configure with this device and cheaper than many alternatives including some DIY solutions. It works great for this project, the size is perfect as well. I am looking forward to many years of service. Other uses of this product have been for automagically turning on a fan in my 3D printer and opening garage doors. Great products!

### ⭐⭐⭐⭐⭐ Confusing instructions, but great once installed
*by E***L on August 27, 2025*

Here’s what I finally figured out. The 120V live (black) wire goes to three places: “L”, “I” and one of your switch terminals. Connect the other switch terminal to “SW”, and connect the 120V neutral (white) wire to “N”. Finally, connect your load’s black wire to “O”. The load’s neutral should be connected to the incoming neutral (same one you connected to “N”). Once it’s installed, the app makes it a breeze to set up and control - kudos to the software engineers! I love the flexibility. I’m using mine to turn on my lights at sunset, and turn them off 8 hours later. I’m thinking of using these in some of my unswitched outlets.

## Frequently Bought Together

- Shelly Plus 1 UL | WiFi Smart Relay Switch with Dry Contacts | Home Automation | Bluetooth Gateway | Alexa, SmartThings & Google Home Compatible | No Hub | DIY Remote Control | Garage Door Opener
- Shelly Plus Add-On | Wi-Fi & Bluetooth Add-On for Shelly Plus Devices | Measure Temperature and Humidity | Home Automation | Works with Alexa & Google Home | iOS Android App |No Hub | Digital Sensor

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-04-25*