Shelly 1PM Gen4 vs Shelly Plus 1PM (2026): Which to Buy?

Updated September 2026

Data from Amazon and official Shelly site.

2026 verdict

Winner

$28.99

Generation gap: the Shelly 1PM Gen4 wins this metering-relay comparison on integrations and Zigbee routing, since it supports Matter, Apple HomeKit and Zigbee alongside Wi-Fi and Bluetooth, while the Shelly Plus 1PM stops at Alexa, Google Home, SmartThings and Home Assistant over Wi-Fi. The Gen4 also installs without a neutral wire and can run from 12-48V DC. The Shelly Plus 1PM is cheaper and is the safer-specified module, listing overheating, overvoltage, overcurrent and overpower protection where the Gen4 documents none, and it comes with a 3-year warranty and a long reliability record. Both switch 16A on a single channel, both meter power and consumption, both offer dry and wet contact modes, both remember state after a power cut, and both work fully locally with Home Assistant. Choose the Shelly 1PM Gen4 for Matter, HomeKit, Zigbee or a no-neutral box, and the Shelly Plus 1PM to save money on a protected, proven module.

Winner

Shelly

Shelly 1PM Gen4

$28.99

Buy on Amazon USACheck price

Shelly

Shelly Plus 1PM

$27.49

Buy on Amazon USACheck price

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Feature	Shelly 1PM Gen4	Shelly Plus 1PM	Winner
Price	$28.99	$27.49	Shelly Plus 1PM
Rating	4.7	4.6	Shelly 1PM Gen4
Integrations	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Google Home, Alexa, Samsung SmartThings, Home Assistant	Shelly 1PM Gen4
Zibgee Router	YES	NO	Shelly 1PM Gen4
Safety	Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection	Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection	Tie
Connectivity	Bluetooth, Zigbee	2.4 GHz WiFi, Bluetooth	Tie
Relay Channels	1	1	Tie
Energy Monitoring	YES	YES	Tie
Power Off Memory	NO	NO	Tie
Dry Contact Mode	YES	YES	Tie
Wet Contact Mode	YES	YES	Tie

Winner

Shelly

Shelly 1PM Gen4

$28.99

Buy on Amazon USACheck price

+ Rating: 4.7
+ Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
+ Zibgee Router: YES
- Price: $28.99 vs $27.49

Shelly

Shelly Plus 1PM

$27.49

Buy on Amazon USACheck price

+ Price: $27.49
- Rating: 4.6 vs 4.7
- Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

Frequently Asked Questions

Which is better overall: Shelly 1PM Gen4 or Shelly Plus 1PM?

The Shelly 1PM Gen4 wins overall thanks to its wider connectivity: Matter, Apple HomeKit and Zigbee support on top of Wi-Fi and Bluetooth, plus a no-neutral install. The Shelly Plus 1PM is cheaper and lists a full set of overheating, overvoltage, overcurrent and overpower protections.

What is the biggest difference between the Shelly 1PM Gen4 and the Shelly Plus 1PM?

Protocols and wiring. The Shelly 1PM Gen4 can run over Zigbee or Wi-Fi, supports Matter and HomeKit, and needs no neutral wire. The Shelly Plus 1PM is Wi-Fi only with no Matter or HomeKit, and it requires a neutral at the install point.

Do both measure energy consumption?

Yes. Both the Shelly 1PM Gen4 and the Shelly Plus 1PM report instantaneous power, voltage and accumulated consumption for the circuit they switch, which is the whole point of the PM designation. Both are also rated for 16A on a single channel.

Which module has better electrical protection?

The Shelly Plus 1PM, which documents overheating, overvoltage, overcurrent and overpower protection. The Shelly 1PM Gen4 lists none of those in its specifications, so for a demanding load such as a water heater the Plus 1PM is the more conservative choice, provided you have a neutral wire.

Who should buy the Shelly 1PM Gen4?

Buy the Shelly 1PM Gen4 if you want metering plus modern connectivity: Matter, Apple HomeKit, Zigbee routing and Bluetooth, with a 16A relay that installs without a neutral and runs from AC or 12-48V DC. It is the more future-proof of the two.

Who should buy the Shelly Plus 1PM?

Buy the Shelly Plus 1PM if you want to spend less on a proven metering relay with the full protection set, dry and wet contact modes, 16A AC or 10A DC switching and a 3-year warranty. Just confirm you have a neutral wire and do not need Matter or HomeKit.

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