Shelly 1PM Gen4 16A Smart or Shelly Plus 2PM 2-Channel Smart? Which Shelly Model to Buy
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The shelly 1pm gen4 16a smart vs plus 2pm 2 channel smart comparison highlights two distinct relay options. Both devices offer power metering and Shelly app control. The main difference lies in channel count and connectivity standards. The Plus 2PM manages two separate circuits. The 1PM Gen4 supports Matter and Zigbee protocols. This affects which smart home platforms each device integrates with most effectively.
Key differences
| Aspect | Shelly Plus 2PM 2-Channel Smart Relay | Shelly 1PM Gen4 16A Smart Relay |
|---|---|---|
| Channels | 1 channel | 2 channels |
| Connectivity | Wi-Fi, Zigbee, Matter, Bluetooth | Wi-Fi, Bluetooth |
| Smart Home Compatibility | Alexa, Google Home, Home Assistant | Alexa, Google Home |
| Certification | Non UL or UL options | not listed |
| Weight | 0.92 ounces | 0.99 ounces |
Which one should you choose?
Choose Shelly Plus 2PM 2-Channel Smart Relay if
- You need support for Matter or Zigbee protocols
- You require integration with Home Assistant or SmartThings
- You want to control only a single circuit per device
Choose Shelly 1PM Gen4 16A Smart Relay if
- You need to monitor and control two separate circuits with one unit
- You prefer a simpler Wi-Fi and Bluetooth connection setup
- You want to reduce wiring footprint by managing two lights on one phase
Verdict: The Shelly 1PM Gen4 suits users who need modern protocol support like Matter and broader platform compatibility. The Plus 2PM is better if you need to manage two separate circuits with a single device. Choose based on your channel count needs and existing smart home infrastructure.
Shelly 1PM Gen4 vs Plus 2PM Specs
Connectivity standards
The Shelly 1PM Gen4 offers a broader range of wireless protocols. It supports Wi-Fi, Zigbee, Matter, and Bluetooth. This combination allows it to connect to various hubs and local networks without extra hardware. The Shelly Plus 2PM provides Wi-Fi and Bluetooth connectivity. It lacks native Zigbee or Matter support in its listed specifications. For users relying on Matter or Zigbee ecosystems, the Gen4 provides more direct integration paths. The Plus 2PM relies on Wi-Fi for primary communication. Both devices use Bluetooth for local setup and configuration.
Channel count
The Shelly Plus 2PM features two independent channels. You can control two separate electrical circuits or appliances with a single device. This reduces the number of modules needed in your junction box. The Shelly 1PM Gen4 is a single-channel device. It controls only one circuit or appliance per unit. If you need to manage two lights or devices on the same phase, the Plus 2PM consolidates that into one component. The 1PM Gen4 requires two units to achieve the same dual-control capability. This impacts your wiring layout and installation space.
System compatibility
Both devices support Amazon Alexa and Google Home for voice control. The Shelly 1PM Gen4 lists additional compatibility with Home Assistant and Samsung SmartThings. This expands your options for local automation and third-party integrations. The Shelly Plus 2PM lists Alexa and Google Home in its key specs. The data does not explicitly mention Home Assistant or SmartThings support for the Plus 2PM. If you use Home Assistant or SmartThings as your primary hub, the Gen4 offers verified compatibility. This ensures smoother automation scenes and local control reliability.
Certification status
The Shelly 1PM Gen4 is available in both Non UL and UL certified versions. The product data lists these as distinct options for purchase. This allows you to choose based on your local electrical code requirements or insurance needs. The Shelly Plus 2PM data does not mention UL certification or any other safety certification status. You cannot verify its certification level from the provided specifications. If you require UL-listed equipment for your installation, the Gen4 provides a clear path to a certified unit. The Plus 2PM leaves this detail unconfirmed in the data.
Physical dimensions
Both devices share identical external measurements. They measure 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. This compact form factor allows them to fit behind most standard wall switches and sockets. The Shelly 1PM Gen4 weighs 0.92 ounces. The Shelly Plus 2PM weighs 0.99 ounces. The weight difference is minimal and unlikely to affect installation stability. Both designs prioritize space-saving integration into existing electrical boxes. You can retrofit either device without modifying your wall plates or switch boxes significantly.
Which Shelly Smart Relay Suits You
Users needing two-channel control
The Shelly Plus 2PM features two distinct channels. This allows you to monitor and control two separate circuits with one device. It supports Wi-Fi and Bluetooth for reliable local connectivity. You can track power consumption for each channel individually. This setup reduces wiring footprint when managing multiple lights on the same phase.
Buyers wanting Matter and Zigbee support
The Shelly 1PM Gen4 supports Wi-Fi, Zigbee, Matter, and Bluetooth. This broader protocol range ensures compatibility with more hubs and local networks. It functions as a Bluetooth gateway to enhance connectivity. You get precise power monitoring for single appliances. The compact design fits behind most wall switches for easy retrofitting.
Users with Home Assistant setups
The Shelly 1PM Gen4 explicitly lists Home Assistant compatibility alongside Alexa and Google Home. Its support for Zigbee and Matter provides flexible integration options. You can create custom automations and scenes directly within your preferred platform. This device offers a streamlined path for advanced users seeking local control and broad ecosystem support.
The products compared
Shelly Plus 2PM 2-Channel Smart Relay
Best for: monitoring and controlling two separate circuits
- Connectivity
- Wi-Fi, Bluetooth
- Smart Home Compatibility
- Alexa, Google Home
- Dimensions
- 0.63 × 1.65 × 1.46 inches
- Weight
- 0.99 ounces
View on Amazon: Shelly Plus 2PM 2-Channel Smart Relay Affiliate link
The Shelly Plus 2PM is a dual-channel smart relay switch with Wi-Fi and Bluetooth connectivity. It features two integrated power meters, allowing you to monitor energy consumption for each circuit separately. This device supports up to 16A per channel and includes a 3-year warranty. It is designed for users who need to control and track two separate electric appliances or circuits from a single compact unit.
Pros
- Dual-channel design controls two circuits independently
- Integrated power metering for each channel
- Wi-Fi and Bluetooth connectivity options
- 3-year device warranty included
Cons
- Single-channel limit compared to multi-device setups
- Requires Wi-Fi or Bluetooth for remote control
- No mention of local-only operation mode
Good fit if
- You need to monitor energy use for two separate circuits
- You want to control two appliances from one device
- You prefer Wi-Fi or Bluetooth connectivity
Skip if
- You require more than two independent channels
- You need a device without network connectivity
- You prefer a single-channel relay for simplicity
Verdict: Shelly Plus 2PM Smart Relay Switch is ideal for users who need to monitor and control two separate circuits with individual power tracking. It suits those who value dual-channel efficiency and reliable connectivity.
Shelly 1PM Gen4 16A Smart Relay
Best for: single-circuit energy monitoring and Matter integration
- Connectivity
- Wi-Fi, Zigbee, Matter, Bluetooth
- Smart Home Compatibility
- Alexa, Google Home, Home Assistant
- Dimensions
- 0.63 × 1.65 × 1.46 inches
- Weight
- 0.92 ounces
View on Amazon: Shelly 1PM Gen4 16A Smart Relay Affiliate link
The Shelly 1PM Gen4 is a single-channel smart relay switch with 16A capacity and real-time power monitoring. It connects via Wi-Fi, Zigbee, and Matter, allowing you to control appliances remotely. The compact design fits behind standard wall switches. This unit suits users who need precise energy tracking for high-load devices like water heaters or space heaters within a modern smart home ecosystem.
Pros
- 16A single-channel capacity for high-power appliances
- Real-time power consumption monitoring
- Matter, Zigbee, and Wi-Fi connectivity
- Compact size fits behind wall switches
Cons
- Single-channel limit restricts simultaneous control of two devices
- No physical remote included for manual override
- Non-UL certification option available
Good fit if
- You need precise energy monitoring for a single high-load circuit
- You require Matter or Zigbee compatibility for your smart home
- You want to retrofit existing wall switches with automation
Skip if
- You need to control two independent circuits simultaneously
- You require a UL-certified device for strict code compliance
- You prefer a device with a built-in display for local status
Verdict: Shelly 1PM Gen4 16A Smart Relay delivers essential power monitoring and broad protocol support for single-circuit automation. It fits users who prioritize energy tracking and Matter compatibility over multi-channel control.
Specifications side by side
| Spec | Shelly Plus 2PM 2-Channel Smart Relay | Shelly 1PM Gen4 16A Smart Relay |
|---|---|---|
| Connectivity | Wi-Fi, Bluetooth | Wi-Fi, Zigbee, Matter, Bluetooth |
| Smart Home Compatibility | Alexa, Google Home | Alexa, Google Home, Home Assistant |
| Dimensions | 0.63 × 1.65 × 1.46 inches | 0.63 × 1.65 × 1.46 inches |
| Weight | 0.99 ounces | 0.92 ounces |
| Size | 1 Pack | Non UL |
| Color | Blue | not stated |
| Model | 3800235265031 | 3800238070717 |
Frequently asked questions
Can the Shelly Plus 2PM control two separate lights independently?
Yes, the Shelly Plus 2PM features two distinct channels. This allows you to monitor and control two separate circuits with one device. Each channel operates independently, giving you precise management over different loads without needing additional hardware for each circuit.
Does the Shelly 1PM Gen4 support Matter protocol?
Yes, the Shelly 1PM Gen4 supports Matter integration. It offers a broader range of wireless protocols, including Wi-Fi, Zigbee, Matter, and Bluetooth. This combination allows it to connect to various hubs and local networks without extra hardware, ensuring future-proof compatibility.
Which Shelly relay is better for monitoring energy usage?
Both devices offer power metering capabilities. The Shelly Plus 2PM is ideal for users who need to monitor and control two separate circuits with individual power tracking. The Shelly 1PM Gen4 delivers essential power monitoring for single-circuit automation, fitting those who prioritize energy tracking.
What is the size difference between the two models?
Both units share identical dimensions of 1.65 inches in width, 1.46 inches in height, and 0.63 inches in length. However, the Shelly Plus 2PM weighs 0.99 ounces, while the Shelly 1PM Gen4 is slightly lighter at 0.92 ounces. This minor weight difference does not affect installation.
Do these relays work with Alexa and Google Home?
The Shelly Plus 2PM explicitly lists compatibility with Alexa and Google Home. It supports Wi-Fi and Bluetooth for reliable local connectivity. While specific voice assistant support for the 1PM Gen4 is not listed in the provided data, it integrates with the Shelly app for control.
Can I use the Shelly Plus 2PM for a single circuit?
Yes, you can use the Shelly Plus 2PM for a single circuit. Although it features two distinct channels, you can simply utilize one channel for your specific load. This provides dual-channel efficiency even if you only need to control one device or circuit at this time.
What connectivity options does the Shelly 1PM Gen4 have?
The Shelly 1PM Gen4 supports Wi-Fi, Zigbee, Matter, and Bluetooth. This combination allows it to connect to various hubs and local networks without extra hardware. The Shelly Plus 2PM supports Wi-Fi and Bluetooth, offering reliable local connectivity for standard smart home setups.