Relays · Head to head

Shelly 1PM Gen4 vs Shelly PM Mini Gen3

Full Smart Relays comparison in 2026

Updated October 2026
Data from Amazon and official Shelly site.
2026 verdict
Shelly 1PM Gen4 does what the Shelly PM Mini Gen3 does, measuring a circuit's power, and also switches it, which makes it the better buy of these two metering modules.
Shelly 1PM Gen4
Winner
Shelly 1PM Gen4
$28.99

Last recorded price

Buy on Amazon USA
On top of energy monitoring it brings a 16A relay with dry and wet contact modes, overheating, overvoltage, overcurrent and overpower protection, Zigbee through a hub with Zigbee routing, and Matter with Apple Home, and it can also run from a 12V or 24-48V DC supply. The Shelly PM Mini Gen3 is the lower priced option, a smaller 29 x 34 x 16 mm meter with no relay, no Matter and no Apple Home. Both read consumption into Alexa, Google Home, SmartThings and Home Assistant. Choose the Shelly 1PM Gen4 to control and measure an appliance, and the Shelly PM Mini Gen3 only to watch a circuit that already has a switch you are keeping.
Winner
Shelly 1PM Gen4
Shelly

Shelly 1PM Gen4

Prime exclusive deal
$28.99

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 2$55.99$28.00 per unitBuy
vs
Shelly PM Mini Gen3
Shelly
#9 Best Seller in Relays

Shelly PM Mini Gen3

Prime exclusive deal
$14.49

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 2$27.99$13.99 per unitBuy
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FeatureShelly 1PM Gen4Shelly PM Mini Gen3Winner
Price$28.99$14.49Shelly PM Mini Gen3
SafetyOverheating protection, Overvoltage protection, Overcurrent protection, Overpower protectionNoneShelly 1PM Gen4
Connectivity2.4 GHz WiFi, Bluetooth, Zigbee2.4 GHz WiFi, BluetoothShelly 1PM Gen4
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly 1PM Gen4
Dry Contact ModeYESNOShelly 1PM Gen4
Wet Contact ModeYESNOShelly 1PM Gen4
Zigbee RouterYESNOShelly 1PM Gen4
Rating4.64.6Tie
Warranty3 years3 yearsTie
Energy MonitoringYESYESTie

What the differences mean

Switching

The Shelly 1PM Gen4 is a relay with metering: it turns the load on and off and reports what it draws. The Shelly PM Mini Gen3 only measures, so an appliance on it can be watched but not controlled.

Neutral wire and DC power

Both need a neutral on mains power, which rules both out of older switch boxes without one. Only the Shelly 1PM Gen4 can instead run from a 12V or 24-48V DC supply.

Matter and Zigbee

The Shelly 1PM Gen4 supports Matter, Apple Home and Zigbee through a hub, and routes Zigbee traffic. The Shelly PM Mini Gen3 is Wi-Fi and Bluetooth only and does not appear in Apple Home.

Size

At 29 x 34 x 16 mm and 13 g, the Shelly PM Mini Gen3 is smaller than the 37 x 42 x 16 mm Shelly 1PM Gen4, which makes it easier to tuck into a box beside an existing switch.

Which one to buy if

Winner
Shelly

Shelly 1PM Gen4

Prime exclusive deal
$28.99

Last recorded price

Buy on Amazon USA
  • + Safety: Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection
  • + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Price: $28.99 vs $14.49
Shelly

Shelly PM Mini Gen3

Prime exclusive deal
$14.49

Last recorded price

Buy on Amazon USA
  • + Price: $14.49
  • - Safety: None vs Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection
  • - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Bluetooth, Zigbee

What owners say

Owners of both Shelly modules agree the metering is accurate and that Home Assistant picks them up almost immediately. Shelly 1PM Gen4 owners use the readings to automate what they measure, power-cycling a furnace, running a dehumidifier or keeping a wall tablet's battery between two levels, and they like the Zigbee repeater role; their complaints are an unconventional, poorly drawn wiring diagram and radio switching by button presses that needs a firm touch. Shelly PM Mini Gen3 owners watch washing machines, dryers and caravan hookups and value it as a Shelly BLU gateway, while they warn that it cannot switch anything, that its terminals suit lighter cables and that Shelly's naming led some to order the wrong model.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly 1PM Gen4
  • Shelly PM Mini Gen3

Loading price history...

Frequently Asked Questions

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

The Shelly 1PM Gen4 for most buyers, because it meters and switches and adds Zigbee and Matter. The Shelly PM Mini Gen3 is the better pick only when you want measurement alone at a lower price.

Is the Shelly PM Mini Gen3 the same as a mini Shelly 1PM Gen4?

No. Both meter power, but the Shelly PM Mini Gen3 has no relay and cannot switch the circuit, while the Shelly 1PM Gen4 is a 16A relay with metering built in. Owners of the PM Mini mention that the similar names led them to order the wrong model.

Do the Shelly 1PM Gen4 and the Shelly PM Mini Gen3 work with Home Assistant?

Yes, both integrate with Home Assistant, Alexa, Google Home and SmartThings. Only the Shelly 1PM Gen4 adds Matter, Apple Home and Zigbee.

Do the Shelly 1PM Gen4 and the Shelly PM Mini Gen3 need a neutral wire?

Both need a neutral on mains power. The Shelly 1PM Gen4 can instead be powered from a 12V or 24-48V DC supply, where no neutral is needed; the Shelly PM Mini Gen3 runs on mains only.

Who should buy the Shelly 1PM Gen4?

Anyone who wants to both control and measure an appliance such as a water heater, boiler or dehumidifier, with Wi-Fi, Zigbee or Matter to choose from.

Who should buy the Shelly PM Mini Gen3?

Home Assistant users who want precise consumption readings on a circuit whose switch already works, in the smallest possible module.

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