Shelly 1 Gen4 Smart Relay Review: Specs, Pros and Cons
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This shelly 1 gen4 review looks at a compact smart relay switch designed for retrofitting into tight electrical spaces. It features Wi-Fi, Zigbee, and Bluetooth connectivity, allowing it to function as a Bluetooth gateway without requiring a separate hub. The device supports a maximum load of 16A, making it suitable for controlling various home appliances and lighting fixtures. Its small dimensions enable installation in standard wall boxes, power sockets, and light switches. The unit also integrates with major smart home platforms via Matter, providing flexible control options for your automated environment.
What stands out
- Supports Wi-Fi, Zigbee, and Bluetooth connectivity without a hub.
- Matter compatibility for seamless integration with Alexa and Google Home.
- Compact size fits standard electrical wall boxes and tight spaces.
- 16A maximum load capacity for appliances and lighting.
- Dry contacts and single channel for versatile switching.
Who it fits
Good fit for
This relay suits DIY enthusiasts who want to automate existing switches or appliances without replacing hardware. The no-hub requirement simplifies setup for users with Wi-Fi networks. Matter support ensures compatibility with modern smart home ecosystems. The 16A load rating handles most standard lighting and small appliances. Its compact form factor is ideal for retrofitting into existing electrical boxes where space is limited.
Who should skip it
Users requiring UL certification should look elsewhere, as the base model listed is Non UL. If you need more than one channel, this single-channel relay may not suffice. Those who prefer a physical display or remote control will find none here. The device relies on app or voice control, which may not suit everyone. Consider other options if you need a larger form factor or specific certifications not listed.
Verdict: The Shelly 1 Gen4 offers a versatile, hub-free solution for retrofitting smart controls into tight spaces. Its Matter support and compact design make it a practical choice for flexible home automation.
Shelly 1 Gen4 Key Specs Explained
Connectivity: Wi-Fi, Zigbee, Bluetooth
This device uses three wireless standards to communicate. Wi-Fi connects it to your home network directly. Zigbee allows it to join a mesh network for better range. Bluetooth lets it act as a gateway for other devices. You get flexible integration options without needing a single central hub. This multi-protocol support ensures reliable control even if one connection type faces interference in your home environment.
Maximum Load: 16A
The relay can handle up to 16 amps of current. This rating determines the power of appliances you can control safely. You can switch standard lighting circuits or moderate loads. Do not use it for high-power heating elements or motors that exceed this limit. When shopping for controls, check your device's amperage draw to ensure it stays below this threshold for safe, long-term operation.
Hub Requirement: No Hub Required
You do not need to buy a separate central controller to use this switch. It connects directly to your existing Wi-Fi network. This simplifies your setup process and reduces clutter. You can integrate it into your smart home immediately after installation. This feature is ideal for users who want to expand their system without adding more hardware or managing additional devices.
Smart Home Compatibility: Matter, Alexa, Google Home, SmartThings
The device supports Matter, the latest universal smart home standard. It also works with major platforms like Alexa, Google Home, and SmartThings. You can control it via voice commands or app routines on your preferred system. This broad compatibility ensures you are not locked into one ecosystem. You can mix and match devices from different brands while maintaining seamless automation and control.
Compact Design for Tight Spaces
According to the listing, the Shelly 1 Gen4 measures 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. It weighs only 0.92 ounces. These small dimensions allow it to fit into standard electrical wall boxes, power sockets, and light switches. You can place it in tight spaces where bulkier devices would not work. The compact form factor supports seamless retrofitting into existing setups without requiring major modifications. This size makes it suitable for concealed installation behind covers or inside junction boxes.
The device is available in Non UL and UL size variations. It comes in packs of 1, 2, or 4 items. This flexibility lets you choose the quantity that matches your project scope. The listing notes it functions as a relay switch with dry contacts. This layout enables remote control of home appliances and office equipment. You can use it to automate lighting or manage garage doors when paired with a Reed switch. The design prioritizes integration into standard electrical infrastructure rather than standalone aesthetic appeal. You should plan your installation based on these physical constraints to ensure proper fit within your chosen enclosure.
Setup And Everyday Use Guide
The Shelly 1 Gen4 connects directly to your home Wi-Fi network. You do not need a separate hub to operate it. The device also supports Zigbee and Bluetooth standards. This allows it to function as a Bluetooth gateway for other compatible devices. Setup involves installing the unit into standard electrical wall boxes, power sockets, or light switches. Its compact size of 1.65 by 1.46 by 0.63 inches helps it fit into tight spaces. You manage the device using the Shelly Smart Control app. You can also control it through major platforms like Amazon Alexa, Google Home, and Samsung SmartThings. The unit supports Matter, which simplifies integration across different ecosystems. Daily use centers on remote control and automation. You can create custom schedules, scenes, and automations to manage lights and appliances. Voice commands allow you to adjust settings hands-free. The relay switch handles a maximum load of 16A. This capacity lets you control a wide range of home and office equipment. You can also automate garage doors if you pair the relay with a Reed switch and a Shelly Plus Add-on. The system supports 12V and 24-48V DC systems for these specific applications. Manual control remains available, ensuring you can adjust lighting or power at any time. The device includes a three-year warranty for support.
Before You Buy This Relay
You should verify your electrical box dimensions before purchasing. The unit measures 1.65 by 1.46 by 0.63 inches. It fits standard boxes, but tight spaces may require careful installation. Check your smart home ecosystem compatibility. It supports Matter, Alexa, Google Home, and SmartThings. If you use Home Assistant, ensure your version supports the required protocols. You may need additional sensors for status monitoring. Pairing with a Reed switch allows garage door tracking. The device acts as a Bluetooth gateway, which simplifies setup for nearby Zigbee devices. You do not need a separate hub. Consider the 16A maximum load limit. Do not connect appliances exceeding this rating. This relay is best for retrofitting existing switches or controlling high-power circuits. It complements your main thermostat by handling specific lighting or appliance zones. Review the app features for scheduling and automation needs. Ensure your Wi-Fi signal is strong in the installation area for reliable connectivity.
Check before you buy
- Verify your electrical box fits the 1.65 by 1.46 by 0.63 inch dimensions.
- Confirm your smart home platform supports Matter, Alexa, or Google Home.
- Ensure no connected appliance exceeds the 16A maximum load rating.
- Check if you need a Reed switch for door status monitoring.
The product at a glance
Shelly 1 Gen4 Smart Relay Switch
Best for: Hub-free automation of lights and garage doors
- Smart Home Compatibility
- Matter, Alexa, Google Home, SmartThings
- Hub Requirement
- No Hub Required
- Connectivity
- Wi-Fi, Zigbee, Bluetooth
- Switch Function
- Relay Switch
- Maximum Load
- 16A
- Dimensions
- 0.63 × 1.65 × 1.46 inches
View on Amazon: Shelly 1 Gen4 Smart Relay Switch Affiliate link
The Shelly 1 Gen4 is a compact smart relay switch supporting Wi-Fi, Zigbee, and Matter. It handles a maximum load of 16A and requires no hub. You can control connected appliances remotely via the Shelly app or voice assistants like Alexa and Google Home. Its small dimensions allow it to fit into standard wall boxes. This device enables automation for lights and garage doors through dry contacts.
Pros
- Supports Wi-Fi, Zigbee, and Matter protocols
- Handles up to 16A maximum load
- No hub required for setup
- Compatible with Alexa, Google Home, and SmartThings
- Compact size fits standard electrical wall boxes
Cons
- Non-UL certified version listed in data
- Only includes dry contacts, not live switching
- Bluetooth acts as a gateway rather than direct control
Good fit if
- You want to automate lights or garage doors without a hub
- You need a compact relay that fits in tight wall spaces
- You use Matter or Zigbee smart home ecosystems
Skip if
- You require UL certification for your installation
- You need a device with a built-in display
- You prefer a single-pack unit over a multi-pack
Verdict: Shelly 1 Gen4 Smart Relay offers versatile connectivity with Matter and Zigbee support for users who need a hub-free solution. It fits well in tight spaces for automating lights or garage doors, provided you accept the dry contact design.
Specifications side by side
| Spec | Shelly 1 Gen4 Smart Relay Switch |
|---|---|
| Smart Home Compatibility | Matter, Alexa, Google Home, SmartThings |
| Hub Requirement | No Hub Required |
| Connectivity | Wi-Fi, Zigbee, Bluetooth |
| Switch Function | Relay Switch |
| Maximum Load | 16A |
| Dimensions | 0.63 × 1.65 × 1.46 inches |
| Weight | 0.92 ounces |
| Size | Non UL |
| Model | 3800238070687 |
Frequently asked questions
Does the Shelly 1 Gen4 require a hub for operation?
No, you do not need a separate hub to use this device. It connects directly to your home Wi-Fi network for primary control. Additionally, it supports Zigbee and Bluetooth standards. This allows it to function as a Bluetooth gateway for other compatible devices in your smart home setup without extra hardware.
What wireless protocols does the Shelly 1 Gen4 support?
The device supports Wi-Fi, Zigbee, and Bluetooth connectivity standards. Wi-Fi provides direct connection to your local network. Zigbee enables participation in a mesh network for improved range. Bluetooth allows the unit to act as a gateway for other Bluetooth-enabled accessories, offering versatile integration options for your existing smart home ecosystem.
Is the Shelly 1 Gen4 compatible with Matter?
Yes, the product data confirms that this relay supports Matter. This standard allows for seamless integration with various smart home platforms. You can use it for hub-free automation of lights and garage doors. This compatibility ensures broader device interoperability and simplified setup processes within your connected home environment.
How small is the Shelly 1 Gen4 relay?
The unit measures 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. It weighs only 0.92 ounces. These compact dimensions are designed to fit into standard electrical wall boxes and tight spaces. This form factor allows for discreet installation in locations where larger devices would not fit.
Can the Shelly 1 Gen4 control garage doors?
Yes, the device is suitable for automating garage doors. Its dry contact design makes it ideal for this specific application. You can integrate it into your smart home routine to open or close doors remotely. This versatility extends to other lighting circuits as well, providing flexible control options for your property.
What is the model number for the Shelly 1 Gen4?
The specific model number listed for this device is 3800238070687. You can use this identifier when searching for replacement parts or verifying compatibility with your existing setup. It helps distinguish this Gen4 version from previous iterations or other Shelly products in your smart home inventory.