Shelly 1PM Gen4 Smart Relay Switch - WiFi, Zigbee & Matter Relay

In this review the Shelly 1PM Gen4 is assessed as a compact smart relay for DIYers who want remote control and accurate energy monitoring without a separate hub. The unit delivers a clear single reason to buy: it combines multi-protocol connectivity with built-in power metering in a form factor that fits behind most wall switches and sockets, making retrofits straightforward and quick. Setup is typically under 10 minutes and the switch also acts as a Bluetooth gateway, so the device is best for those who want a flexible, space-saving way to automate individual appliances and track consumption.

Key Features

• Wi-Fi, Zigbee & Matter: Multiple wireless options let the relay integrate with a variety of hubs and ecosystems for broader smart home compatibility.
• Power metering: Real-time energy monitoring helps identify energy-hungry appliances like water heaters and washing machines so users can cut waste.
• Bluetooth gateway: Acts as a local gateway to improve connectivity for other devices and expand a home network without extra hardware.
• Compact retrofit design: Small size fits behind most sockets and switches, enabling installation in existing wiring boxes without major changes.
• App control and automation: The Shelly Smart Control app offers remote control, notifications, and scene creation to automate devices on a schedule.

Who It's For

The Shelly 1PM Gen4 suits homeowners and renters comfortable with light electrical work who want to automate single appliances or sockets and also monitor energy use. It is particularly useful when you need a discreet device that hides behind existing switches while offering power consumption tracking and voice assistant compatibility.

It is less ideal for users who need multi-channel relays or a preinstalled professional solution; those seeking a plug-and-play multi-outlet hub or integrated smart panel may prefer a different product. Also, buyers who require a dedicated proprietary hub should look elsewhere, since this device is designed to work hub-free or as part of a broader network.

Pros & Cons

Pros

• Flexible connectivity with WiFi, Zigbee and Matter for wide ecosystem support.
• Built-in real-time energy monitoring that helps reduce consumption and spot energy hogs.
• Compact form factor that fits behind most wall switches and sockets for neat installation.
• Quick setup and useful mobile app for remote control and scene creation.

Cons

• Some users report mixed feelings about advanced functionality, so deep integrations may require additional configuration.
• Single-channel design limits use to one circuit per device if you need to control multiple loads.

Specifications

Product	Shelly 1PM Gen4 smart relay switch (1-channel)
Connectivity	WiFi, Zigbee, Matter, Bluetooth gateway
Maximum load	1 channel, 16A
Primary function	Remote control and power metering
Installation	Compact design fits behind switches and sockets, retrofit friendly
App	Shelly Smart Control app for iOS and Android
Warranty	3 years device warranty

Our Verdict

The Shelly 1PM Gen4 is a solid choice for DIYers and homeowners who want a discreet, single-channel relay with accurate energy monitoring and broad connectivity. It offers excellent value for automating individual appliances and tracking power use, and the compact design plus quick setup make it a practical retrofit. Choose it when you need a reliable, hub-free smart relay that balances features and convenience.

Frequently Asked Questions

Does this need a hub?
The Shelly 1PM Gen4 can operate hub-free over WiFi and also supports Zigbee and Matter; it can act as a Bluetooth gateway to extend connectivity.

Can it monitor power usage?
Yes, it provides real-time power metering for connected appliances so you can track consumption and identify energy-hungry devices.

Is it hard to install?
Installation is typically quick and compact, designed to fit behind most wall switches and sockets; basic wiring knowledge is recommended.