Relays · Head to head

Shelly 1 Mini Gen4 vs Shelly PM Mini Gen3

Full Smart Relays comparison in 2026

Updated October 2026
Data from the official Shelly site.
2026 verdict
The Shelly 1 Mini Gen4 wins this comparison almost by default, since the Shelly PM Mini Gen3 is not a switching relay at all.
Shelly 1 Mini Gen4
Winner
Shelly 1 Mini Gen4
$24.98
Buy on Amazon USA
It is a dedicated energy monitor that measures a circuit but cannot turn it on or off. The Shelly 1 Mini Gen4 adds dry and wet contact modes, a Zigbee router role and Wi-Fi, Bluetooth, Zigbee and Matter connectivity, with Alexa, Google Home, Apple HomeKit, SmartThings and Home Assistant all supported. The Shelly PM Mini Gen3 answers only with a higher owner rating, a lower price and energy monitoring the Gen4 lacks, plus a higher documented load rating for the circuit it measures rather than switches. Buy the Shelly 1 Mini Gen4 to control a circuit, and add the Shelly PM Mini Gen3 alongside it, or instead of it, when what you actually want is a reading of what that circuit consumes.
Winner
Shelly 1 Mini Gen4
Shelly
#4 Best Seller in Relays

Shelly 1 Mini Gen4

Prime exclusive deal
$24.98
Buy on Amazon USA

Also sold in packs

  • Pack of 2$48.99$24.50 per unitYou save $0.97Buy
Works with
Connectivity
vs
Shelly PM Mini Gen3
Shelly
#8 Best Seller in Relays

Shelly PM Mini Gen3

Prime exclusive deal
$14.49
Buy on Amazon USA

Also sold in packs

  • Pack of 2$27.99$13.99 per unitYou save $0.99Buy
Works with
Connectivity
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FeatureShelly 1 Mini Gen4Shelly PM Mini Gen3Winner
Price$24.98$14.49Shelly PM Mini Gen3
Rating4.54.6Shelly PM Mini Gen3
Max Resistive Load Power (Per Channel)2000W3840WShelly PM Mini Gen3
SafetyOverheating protectionNoneShelly 1 Mini Gen4
Connectivity2.4 GHz WiFi, Bluetooth, Zigbee2.4 GHz WiFi, BluetoothShelly 1 Mini Gen4
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly 1 Mini Gen4
Energy MonitoringNOYESShelly PM Mini Gen3
Dry Contact ModeYESNOShelly 1 Mini Gen4
Wet Contact ModeYESNOShelly 1 Mini Gen4
Zigbee RouterYESNOShelly 1 Mini Gen4
Warranty3 years3 yearsTie
Local ControlYESYESTie

What the differences mean

What it actually does

The Shelly 1 Mini Gen4 is a switching relay: it turns the connected circuit on and off. The Shelly PM Mini Gen3 only measures that circuit's power, voltage, current and energy; it has no relay contacts and cannot switch anything.

Connectivity

The Shelly 1 Mini Gen4 connects over Wi-Fi, Bluetooth, Zigbee or Matter, reaching Apple HomeKit and SmartThings directly. The Shelly PM Mini Gen3 uses Wi-Fi and Bluetooth only and reaches SmartThings, with no Apple HomeKit or Matter support.

Documented load rating

The Shelly PM Mini Gen3 documents a 3840W, 16A rating for the circuit it measures, higher than the Shelly 1 Mini Gen4's 2000W, 8A switching rating, since a device that only measures never has to make or break that current the way a relay's contacts do.

Safety protection

The Shelly 1 Mini Gen4 has overheating protection built in. The Shelly PM Mini Gen3 has none of the safety cutoffs tracked for this category.

Price and rating

The Shelly PM Mini Gen3 costs less and holds a higher owner rating than the Shelly 1 Mini Gen4, which is typical of a simpler, single-purpose device measured against a more capable one.

Which one to buy if

Winner
Shelly

Shelly 1 Mini Gen4

Prime exclusive deal
$24.98
Buy on Amazon USA
  • + Safety: Overheating protection
  • + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Price: $24.98 vs $14.49
  • - Rating: 4.5 vs 4.6
Shelly

Shelly PM Mini Gen3

Prime exclusive deal
$14.49
Buy on Amazon USA
  • + Price: $14.49
  • + Rating: 4.6
  • + Max Resistive Load Power (Per Channel): 3840W
  • - Safety: None vs Overheating protection
  • - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Bluetooth, Zigbee

What owners say

Shelly 1 Mini Gen4 owners describe a tiny module that still does a lot: it tucks into crowded switch or fixture boxes, configures over Wi-Fi, Bluetooth, Zigbee or Matter, and its dry contacts get used for garage door openers, pool lights, boilers and security lamps while the manual switch keeps working. They complain mostly about fit and paperwork, it still needs a neutral wire, the printed instructions are tiny, it is rated 8A rather than the full-size Gen4's 16A, and this model is not UL or ETL listed. Shelly PM Mini Gen3 owners praise precise power, voltage, current and energy readings on a single circuit, fast Home Assistant integration and its use as a gateway for Shelly's Bluetooth sensors, but several note that it only measures a circuit rather than switching it, a point of confusion given the similar Shelly naming, and that its terminals suit lighter circuits rather than a full-rated ring main.

Frequently Asked Questions

Which is better: the Shelly 1 Mini Gen4 or the Shelly PM Mini Gen3?

They do different jobs. The Shelly 1 Mini Gen4 is the one to buy for switching a circuit, with dry contacts and multi-protocol connectivity. The Shelly PM Mini Gen3 is for measuring a circuit's power use, and it cannot switch anything.

What is the biggest difference between the Shelly 1 Mini Gen4 and the Shelly PM Mini Gen3?

The Shelly 1 Mini Gen4 is a relay that turns a circuit on and off. The Shelly PM Mini Gen3 is a power meter with no switching contacts at all, so it only reports what a circuit consumes.

Can the Shelly PM Mini Gen3 turn an appliance on and off?

No. It measures power, voltage, current and energy on a circuit but has no relay to switch it. For switching, the Shelly 1 Mini Gen4 or a Shelly 1PM model is the right choice.

Does the Shelly 1 Mini Gen4 measure energy use?

No, it has no energy monitoring. The Shelly PM Mini Gen3 adds that measurement, or Shelly's 1PM Gen4 combines switching and metering in one device.

Who should buy the Shelly 1 Mini Gen4?

Anyone who needs to switch a circuit remotely, with the choice of Wi-Fi, Bluetooth, Zigbee or Matter and dry contacts for garage doors or low-voltage projects.

Who should buy the Shelly PM Mini Gen3?

Anyone who wants to see exactly how much power an appliance or circuit draws, especially one that already has its own switch and just needs the numbers.

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