Shelly 2PM Gen4 2-Channel Relay Review: Specs, Pros and Cons
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This shelly 2pm gen4 review covers a dual-channel smart relay that connects via Wi-Fi, Zigbee, and Bluetooth. It supports up to 16A per channel and includes built-in power metering. You can monitor energy use for two separate circuits independently. The device works without a hub, fitting directly into your existing network. It also acts as a Bluetooth gateway for nearby devices. This setup lets you control lights, motors, or appliances through voice commands or the Shelly Smart Control app. It is a compact solution for managing multiple loads from a single unit.
What stands out
- Dual channels with 16A load capacity each
- Built-in power metering for energy tracking
- Matter, Zigbee, and Wi-Fi connectivity
- No hub required for basic operation
- Functions as a Bluetooth gateway
Who it fits
Good fit for
You should choose this relay if you need to monitor energy consumption for two separate circuits on a single phase. It suits users who want to control lights, automated curtains, or bi-directional motors without adding a central hub. The support for Matter and Zigbee makes it ideal for homes using Home Assistant, SmartThings, or Alexa. If you value precise energy data and flexible voice control for individual appliances, this device fits your setup.
Who should skip it
Skip this model if you require UL certification, as the data lists the size as Non UL. You might also look elsewhere if you need more than two channels, since this unit only handles two independent loads. Buyers seeking a wired display or remote control will find neither mentioned in the specifications. If your home network relies solely on Zigbee without Wi-Fi fallback, note that this device requires Wi-Fi connectivity for full functionality.
Verdict: The Shelly 2PM Gen4 offers dual-channel control with energy monitoring for users who need flexible, hub-free smart relay options. Its multi-protocol support makes it a versatile choice for diverse smart home ecosystems.
Shelly 2PM Gen4 Key Specs
Connectivity: Wi-Fi, Zigbee, Bluetooth
This device supports three distinct wireless standards. You can connect it to your existing Wi-Fi network for direct internet access. It also includes Zigbee support for mesh networking and Bluetooth for local setup. This mix ensures broad compatibility with various smart home ecosystems, including Matter, without forcing you to choose a single protocol for all your devices.
Maximum Load: 16A per channel
Each of the two channels can handle a current of up to 16 amperes. This capacity allows you to control high-power appliances, such as electric heaters or large lighting arrays, safely. When shopping for home controls, compare this rating against your device’s requirements to ensure you do not exceed the limit, which could trigger a safety shutdown.
Hub Requirement: No Hub Required
You do not need to purchase or install a separate central controller to use this relay. It connects directly to your home network. This simplifies your setup process and reduces clutter in your smart home infrastructure. You can integrate it into platforms like Alexa or Google Home immediately, making it a straightforward addition for users who prefer minimal hardware.
Smart Home Compatibility: Alexa, Google Home, SmartThings, Matter
The relay works with major voice assistants and automation platforms. You can control it via voice commands or integrate it into complex scenes within Home Assistant or SmartThings. The inclusion of Matter support ensures future-proofing and interoperability with new devices. This broad compatibility allows you to centralize control of your lighting and appliances regardless of your preferred ecosystem.
Design and build overview
The Shelly 2PM Gen4 is a compact relay switch. According to the listing, it measures 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. The unit weighs 0.92 ounces. These dimensions make it small enough to fit inside standard electrical boxes. You can install it in tight spaces without taking up much room. The device is available in black. The listing notes two size options: Non UL and UL. This refers to safety certification rather than physical dimensions. You should check your local electrical codes to see which version you need. The layout is simple. It is a dual-channel relay. You get two independent circuits on one small board. This design lets you control two separate loads, like lights or motors, from a single device. There are no external buttons or displays on the unit itself. You manage it through the Shelly app or voice commands. The finish is plastic. It is durable for indoor wall installation. The small size and light weight mean you can mount it easily behind switches or in junction boxes. You do not need extra space for a bulky hub. The design focuses on function. It fits discreetly into your home infrastructure. You get reliable control without visual clutter. The build supports both Wi-Fi and Zigbee connectivity. This allows flexible placement in your smart home setup. You can position it where you need power monitoring, not where your Wi-Fi signal is strongest. The compact form factor is key for retrofit projects. You can upgrade existing switches without major renovations. The black color blends with most electrical plates. It remains out of sight once installed. This practical design suits users who want hidden smart controls. You get advanced features in a minimal package. The specs show it is built for efficiency and space saving.
Setup and everyday use
You can connect this device to your home network without adding a separate hub. The listing confirms it supports Wi-Fi, Zigbee, and Bluetooth. You likely use Bluetooth for the initial local setup. Wi-Fi handles ongoing remote control and internet connectivity. Zigbee allows it to join a mesh network if your system requires it. This multi-protocol approach simplifies integration into existing smart home ecosystems. You can pair it with Amazon Alexa, Google Home, Samsung SmartThings, and Home Assistant. The inclusion of Matter support suggests broad compatibility with modern platforms. You manage the device through the Shelly Smart Control app or your preferred third-party software. Daily operation involves controlling two independent channels. You can monitor energy consumption for each circuit separately. This feature helps you track power usage for individual appliances or lighting circuits. You can set schedules or create automations based on time or energy thresholds. The device also functions as a Bluetooth gateway, which may extend the range of other Bluetooth devices in your home. You can control connected loads via manual switches, the app, or voice commands. This flexibility allows you to adapt the relay to various scenarios, such as managing bedroom curtains or office equipment. You receive notifications for automated events through the app. This keeps you informed about system actions without constant manual checking. The compact size means it fits easily into standard electrical boxes. You do not need to worry about excessive bulk affecting installation space.
Before You Buy This Relay
You need to verify your home’s electrical setup before installing this dual-channel relay. The listing specifies a maximum load of 16A per channel. Ensure your connected appliances, such as motors or lighting circuits, do not exceed this limit. Check that your Wi-Fi signal reaches the installation point reliably. Although it supports Zigbee and Bluetooth, you must confirm compatibility with your chosen smart home platform like Home Assistant, SmartThings, or Alexa. The device functions without a hub, but you should review your existing ecosystem to avoid conflicts. Keep the Shelly Smart Control app updated for reliable remote management. This relay fits well alongside other smart home controls by offering precise energy monitoring. It suits users who need independent control of two circuits. Verify your wiring matches the non-UL or UL variant you select. Regular firmware updates will maintain security and feature access.
Check before you buy
- Confirm your appliances stay under 16A per channel.
- Check Wi-Fi signal strength at the installation site.
- Verify compatibility with your preferred smart home platform.
- Ensure you have the Shelly Smart Control app.
The product at a glance
Shelly 2PM Gen4 2-Channel Relay
Best for: Dual-circuit energy monitoring and multi-protocol setups
- Smart Home Compatibility
- Alexa, Google Home, Apple HomeKit
- Hub Requirement
- No Hub Required
- Connectivity
- Wi-Fi, Zigbee, Matter, Bluetooth
- Maximum Load
- 16A per channel
- Dimensions
- 0.63 × 1.65 × 1.46 inches
- Weight
- 0.92 ounces
View on Amazon: Shelly 2PM Gen4 2-Channel Relay Affiliate link
The Shelly 2PM Gen4 is a 2-channel smart relay switch supporting Wi-Fi, Zigbee, and Matter. It handles up to 16A per channel and includes built-in power metering for individual load monitoring. The device requires no hub and integrates with major platforms like Alexa and Google Home. Its compact size fits standard electrical boxes. It suits users who need precise energy tracking and multi-protocol connectivity for home automation.
Pros
- Dual-channel control with 16A max load per channel
- Built-in power metering for individual energy monitoring
- Supports Wi-Fi, Zigbee, and Matter protocols
- No hub required for operation
Cons
- Lacks UL certification in the base configuration
- No physical display for local status checking
- Bluetooth acts only as a gateway, not direct control
Good fit if
- You need to monitor energy usage for two separate circuits
- You want to avoid buying a separate smart home hub
- You require Matter support for future-proof compatibility
Skip if
- You require UL-listed devices for safety compliance
- You need to control more than two independent loads with one unit
- You prefer a device with a built-in screen for manual control
Verdict: Shelly 2PM Gen4 2-Channel Smart Relay is a robust choice for users who need dual-circuit energy monitoring and multi-protocol support without a hub.
Specifications side by side
| Spec | Shelly 2PM Gen4 2-Channel Relay |
|---|---|
| Smart Home Compatibility | Alexa, Google Home, Apple HomeKit |
| Hub Requirement | No Hub Required |
| Connectivity | Wi-Fi, Zigbee, Matter, Bluetooth |
| Maximum Load | 16A per channel |
| Dimensions | 0.63 × 1.65 × 1.46 inches |
| Weight | 0.92 ounces |
| Size | Non UL |
| Color | Black |
| Model | 3800238070748 |
Frequently asked questions
Does the Shelly 2PM Gen4 require a hub?
No, this device operates without a separate hub. It connects directly via Wi-Fi for internet access and remote control. You can also use Bluetooth for initial local setup. Zigbee support allows it to join mesh networks if needed. This flexibility means you can integrate it into your existing smart home infrastructure without buying additional hardware.
What is the maximum current load per channel?
Each channel supports a maximum load of 16A. This rating applies to each of the two independent circuits. You must ensure connected appliances do not exceed this limit. Exceeding the 16A threshold may damage the unit or cause safety issues. Always verify the power requirements of your motors or lighting circuits before installation.
Can I monitor energy usage for both channels separately?
Yes, the device includes built-in power metering for each channel. You can monitor energy use for two separate circuits independently. This feature allows you to track consumption for different appliances or zones. The data helps you identify power-hungry devices and manage your home’s energy efficiency more effectively.
What wireless protocols does this relay support?
The Shelly 2PM Gen4 supports Wi-Fi, Zigbee, and Bluetooth. Wi-Fi provides direct internet connectivity for remote control. Bluetooth facilitates local setup without needing a network connection. Zigbee enables mesh networking for extended range and reliability. This multi-protocol support makes it compatible with various smart home ecosystems.
How big is the Shelly 2PM Gen4?
The unit measures 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. It weighs 0.92 ounces. These compact dimensions allow it to fit easily into standard electrical boxes. The small form factor minimizes visibility when installed behind switches or outlets.
Is this relay UL certified?
The product listing specifies the size as Non UL. This indicates it may not carry UL certification for safety standards in your region. You should verify local electrical codes and safety requirements before installation. Using uncertified devices in certain jurisdictions may void insurance or violate building regulations.
What is the model number for this device?
The model number is 3800238070748. You can use this identifier to find specific replacement parts or technical documentation. It helps distinguish this Gen4 version from previous Shelly relay models. Keep this number handy when contacting support or searching for compatible accessories.