Shelly 1PM Gen4 Relay Switch Review: Who It Fits and Who Should Skip It
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
This shelly 1pm gen4 review looks at a compact relay switch designed for retrofitting into existing electrical setups. It connects via Wi-Fi, Zigbee, and Bluetooth, requiring no separate hub. The device includes real-time power metering to track energy use. It measures 1.65 by 1.46 by 0.63 inches and weighs 0.92 ounces. This small form factor allows it to fit behind most standard wall switches and sockets. You can control connected appliances remotely through the Shelly Smart Control app or voice assistants. The unit supports Matter, ensuring broad compatibility with modern smart home ecosystems.
What stands out
- Supports Wi-Fi, Zigbee, and Bluetooth connectivity without a hub
- Includes real-time power metering for energy monitoring
- Compact dimensions of 1.65 by 1.46 by 0.63 inches fit behind wall switches
- Matter compatibility ensures integration with major smart home platforms
- Functions as a Bluetooth gateway to enhance local device connectivity
Who it fits
Good fit for
This switch suits homeowners who want to add smart control to existing lighting or appliances without rewiring. The built-in power metering is ideal for users who want to track energy consumption of devices like water heaters or space heaters. Its multi-protocol support works well if you already use Zigbee or Matter devices. The compact size makes it a practical choice for tight junction boxes behind wall plates. You will appreciate the no-hub setup if you prefer a simpler wiring configuration.
Who should skip it
You should look elsewhere if you need UL certification, as this specific listing is marked Non UL. Buyers who require a physical display on the device will find it lacking, as this is a relay switch without an integrated screen. If you need a device that does not rely on Wi-Fi for primary control, the reliance on network connectivity might be a limitation. Additionally, those who strictly prefer a single-protocol ecosystem without the complexity of multi-protocol support might find the Zigbee and Bluetooth features unnecessary.
Verdict: The Shelly 1PM Gen4 is a versatile, compact relay switch with power monitoring and multi-protocol support. It is best for users retrofitting existing switches who need detailed energy tracking.
Key specs explained for Shelly 1PM Gen4
Connectivity: Wi-Fi, Zigbee, Bluetooth
This device supports three wireless standards. Wi-Fi connects it directly to your router. Zigbee allows it to join mesh networks for broader range. Bluetooth lets you configure it locally without internet. You benefit from flexible installation options. Compare this multi-protocol support to single-band switches that only offer Wi-Fi, which may struggle with signal strength in larger homes or behind metal boxes.
Hub Requirement: No Hub Required
You do not need a separate bridge or hub to operate this switch. It connects directly to your existing Wi-Fi network. This simplifies your setup by reducing the number of devices you must manage. It is ideal if you want to avoid buying additional hardware. Compare this to Zigbee-only devices that require a hub, which adds cost and complexity to your smart home infrastructure.
Smart Home Compatibility: Alexa, Google Home, SmartThings, Matter
The switch works with major voice assistants and platforms. You can control it via voice commands or app routines. Matter support ensures future-proof interoperability with newer ecosystems. You benefit from seamless integration into your current setup. Compare this broad compatibility to proprietary switches that only work with a single brand, limiting your ability to switch platforms or add diverse devices later.
Power Metering
This feature tracks real-time energy consumption of connected appliances. You can see exactly how much power a device uses. This helps identify energy-hungry items like water heaters or space heaters. You benefit from actionable data to optimize usage and efficiency. Compare this to basic relay switches that only toggle power on or off without providing any insight into energy costs or device behavior.
Physical Design and Build Quality
According to the listing, the Shelly 1PM Gen4 measures 1.65 by 1.46 by 0.63 inches. This compact footprint allows it to fit behind most standard wall switches and electrical sockets. You can retrofit the device into existing setups without needing to replace the entire fixture. The small size ensures it remains hidden from view once installed.
The unit weighs 0.92 ounces. This light weight makes handling and mounting straightforward during installation. You do not need heavy-duty brackets or reinforced boxes to support the device. The listing notes the color is red. This visual cue helps you identify the unit quickly during setup or maintenance, though it may be visible if the switch plate is removed.
The listing specifies the size as Non UL. This indicates the physical dimensions match the non-UL variant. You should verify your specific model number against this data if you require UL certification for your project. The device is designed for easy integration into your current wiring. You simply connect it to your existing electrical lines. The compact design ensures it does not protrude or interfere with adjacent switches. This makes it suitable for tight electrical boxes where space is limited.
Setup and everyday use guide
The Shelly 1PM Gen4 requires no separate hub for operation. You connect it directly to your Wi-Fi network. The listing states setup takes under ten minutes. This quick process lets you automate devices rapidly. You can also use Bluetooth for local configuration without an active internet connection. The device supports Zigbee, allowing it to join mesh networks for extended range if needed.
For daily use, you manage the switch via the Shelly Smart Control app or compatible platforms. It works with Amazon Alexa, Google Home, Samsung SmartThings, and Matter-enabled systems. You can control lights and appliances using simple voice commands. The app allows you to create custom automations, schedules, and scenes. You can also manage devices remotely from anywhere.
The power metering feature provides real-time energy tracking. You can monitor consumption for appliances like water heaters, washing machines, or space heaters. This data helps you identify energy-hungry devices. You can then adjust usage to improve efficiency. The compact size, measuring 1.65 by 1.46 by 0.63 inches, fits behind most wall switches and sockets. This design makes retrofitting into existing electrical setups straightforward. You gain precise control over your connected devices without complex wiring changes.
Before you buy this relay
You need a stable Wi-Fi network for primary control. The device supports Zigbee and Bluetooth, which helps with local setup and mesh networking. Check your smart home platform. It works with Alexa, Google Home, SmartThings, and Matter. If you use Home Assistant, it integrates well. You must verify your electrical box size. The unit is compact but requires space behind the switch plate. Consider your automation needs. This switch monitors power, so you can track energy use for appliances. It fits well in homes with existing smart controls. It complements other Shelly devices for whole-home automation. You do not need a separate hub. This simplifies your setup. However, ensure your router signal reaches the switch location. Poor signal may cause connectivity issues. You should also plan your wiring carefully. The device replaces a standard switch, so proper installation is key. Review the dimensions before purchasing to ensure a fit.
Check before you buy
- Verify your smart home platform supports Matter or Zigbee.
- Measure the electrical box depth to ensure the device fits.
- Check Wi-Fi signal strength at the switch location.
- Confirm you have the correct wiring for a relay switch.
The product at a glance
Shelly 1PM Gen4 Relay Switch with Power Metering
Best for: Energy monitoring and Matter integration
- Smart Home Compatibility
- Matter, Alexa, Google Home, SmartThings
- Hub Requirement
- No Hub Required
- Connectivity
- Wi-Fi, Zigbee, Bluetooth
- Switch Function
- Relay Switch
- Dimensions
- 0.63 × 1.65 × 1.46 inches
- Weight
- 0.92 ounces
View on Amazon: Shelly 1PM Gen4 Relay Switch with Power Metering Affiliate link
The Shelly 1PM Gen4 is a compact smart relay switch supporting Wi-Fi, Zigbee, and Matter. It features real-time power monitoring to track appliance energy use. The device connects directly without a hub and fits behind standard wall switches. You can control it via the Shelly app, Alexa, Google Home, or SmartThings. Its small size allows for easy retrofitting into existing electrical setups.
Pros
- Supports Wi-Fi, Zigbee, and Matter protocols
- Includes real-time power monitoring
- No hub required for setup
- Compact 1.65 x 1.46 x 0.63 inch size
Cons
- Only controls single-pole loads
- Not UL listed in the standard configuration
- Requires the Shelly app for initial configuration
Good fit if
- You want to monitor energy usage of specific appliances
- You prefer a hub-free setup with Wi-Fi
- You need Matter compatibility for future-proofing
Skip if
- You require a UL-listed device for safety compliance
- You need to control multi-pole switches or fans
- You want a device with a built-in display
Verdict: Shelly 1PM Gen4 Smart Relay Switch is ideal for users who need precise energy monitoring and Matter support without a central hub. It suits those retrofitting existing switches who do not require UL certification.
Specifications side by side
| Spec | Shelly 1PM Gen4 Relay Switch with Power Metering |
|---|---|
| Smart Home Compatibility | Matter, Alexa, Google Home, SmartThings |
| Hub Requirement | No Hub Required |
| Connectivity | Wi-Fi, Zigbee, Bluetooth |
| Switch Function | Relay Switch |
| Dimensions | 0.63 × 1.65 × 1.46 inches |
| Weight | 0.92 ounces |
| Size | Non UL |
| Color | Red |
| Model | 3800238070717 |
Frequently asked questions
Does the Shelly 1PM Gen4 need a hub?
No, this device operates without a central hub. It connects directly to your Wi-Fi network for primary control. You can also use Bluetooth for local configuration or Zigbee to join mesh networks. This flexibility allows you to set it up quickly without buying additional hardware.
Is the Shelly 1PM Gen4 UL certified?
The product specifications list the size as Non UL. This means it has not received Underwriters Laboratories certification. You should verify local electrical codes before installation. It is designed for retrofitting into existing setups, but the lack of UL marking may matter for some safety-conscious users.
Can I monitor energy usage with this switch?
Yes, the Shelly 1PM Gen4 includes real-time power metering. This feature lets you track energy consumption of connected devices. You can monitor usage patterns to identify inefficient appliances. The data helps you manage your home’s energy use more effectively without needing a separate meter.
What smart home platforms does it support?
It works with major platforms including Alexa, Google Home, and SmartThings. It also supports Matter integration for broader compatibility. You can control it through these services or the Shelly app. This wide support ensures you can add it to most existing smart home ecosystems easily.
How small is the Shelly 1PM Gen4?
The device measures 1.65 by 1.46 by 0.63 inches. This compact footprint allows it to fit behind most standard wall switches. You can retrofit it into existing electrical boxes without taking up much space. The small size makes it suitable for tight installations in older homes.
Does it require an internet connection to work?
Wi-Fi provides the primary control path, requiring a stable internet connection. However, you can use Bluetooth for local setup without internet. Zigbee also offers mesh networking capabilities for better range. While full remote features need Wi-Fi, local control options remain available during outages.
Who is this relay switch best for?
It is ideal for users needing precise energy monitoring and Matter support. You should choose it if you are retrofitting existing switches and do not require UL certification. It suits those who want hub-free operation with multiple connectivity options like Wi-Fi, Zigbee, and Bluetooth.