Updated September 2026
Data from Amazon and official Shelly site.
2026 verdict
For a circuit you want to meter as well as switch, the Shelly 1PM Gen4 is the better relay of these two, adding power monitoring and full electrical protection to a 16A rating.
It measures instant power, voltage and total consumption, protects against overheating, overvoltage, overcurrent and overpower, and works as a Bluetooth gateway, and it is the better reviewed of the pair. The Shelly 1 Mini Gen4 answers with size and price: at 29 x 34 x 16 mm it fits boxes the 37 x 42 x 16 mm 1PM will not, it is the lower priced of the two, and it keeps the same Wi-Fi, Bluetooth, Zigbee and Matter radios with Zigbee router mode. Its limits are 8A and no metering, and like the 1PM it needs a neutral on mains power. Choose the Shelly 1PM Gen4 for appliances you want to watch, and the Shelly 1 Mini Gen4 for lights and door triggers in a tight box.
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| Feature | Shelly 1 Mini Gen4 | Shelly 1PM Gen4 | Winner |
|---|---|---|---|
| Price | $24.98 | $28.99 | Shelly 1 Mini Gen4 |
| Rating | 4.5 | 4.6 | Shelly 1PM Gen4 |
| Safety | Overheating protection | Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection | Shelly 1PM Gen4 |
| Energy Monitoring | NO | YES | Shelly 1PM Gen4 |
| Warranty | 3 years | 3 years | Tie |
| Connectivity | Bluetooth, Zigbee | Bluetooth, Zigbee | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Relay Channels | 1 | 1 | Tie |
| Dry Contact Mode | YES | YES | Tie |
| Wet Contact Mode | YES | YES | Tie |
| Zibgee Router | YES | YES | Tie |
What the differences mean
Energy monitoring
The Shelly 1PM Gen4 reports instant power, voltage and total consumption, which owners use to track appliances and trigger automations. The Shelly 1 Mini Gen4 has no energy monitoring.
Load rating
The Shelly 1PM Gen4 switches up to 16A. The Shelly 1 Mini Gen4 is rated 8A, or 2000 W resistive, enough for lights but not for a heavy appliance. Both need line and neutral on mains power.
Protection
The Shelly 1PM Gen4 protects against overheating, overvoltage, overcurrent and overpower. The Shelly 1 Mini Gen4 only has overheating protection, which is fine for lights but less reassuring on an appliance.
Size
The Shelly 1 Mini Gen4 is 29 x 34 x 16 mm and 19 g; the Shelly 1PM Gen4 is 37 x 42 x 16 mm and 27 g. In a crowded switch box, the Mini is often the only one that fits.
Which one to buy if
- you want to see how much a water heater or boiler uses
The Shelly 1PM Gen4 meters power, voltage and consumption; the Mini does not.
- the switch box is small and already full
The Shelly 1 Mini Gen4 is noticeably smaller and fits where the 1PM will not.
- you are only triggering a garage door or switching a light
The Shelly 1 Mini Gen4 does that job with the same radios and contacts at a lower price.
- + Price: $24.98
- - Rating: 4.5 vs 4.6
- - Safety: Overheating protection vs Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection
Winner
- + Rating: 4.6
- + Safety: Overheating protection, Overvoltage protection, Overcurrent protection, Overpower protection
- + Energy Monitoring: YES
- - Price: $28.99 vs $24.98
What owners say
Owners of both Gen4 relays praise the same foundations: local control with instant response, a choice of Wi-Fi, Zigbee or Matter, and quick integration with Home Assistant, Zigbee2MQTT included, and both groups say the tiny printed instructions send them online. Shelly 1PM Gen4 owners single out the power readings, watching how often a water heater runs or keeping a wall tablet's battery between two levels, and cite the 16A rating as their reason to pick it over the Mini; their complaints are a wiring diagram they call awful and radio switching by firm button presses. Shelly 1 Mini Gen4 owners focus on fitting it where nothing else goes and on garage door and pool light projects, and mention the missing UL or ETL listing and a few failed units.
Upgrading from the Shelly 1 Mini Gen4?
Moving from the Shelly 1 Mini Gen4 to the Shelly 1PM Gen4 adds power metering, a 16A rating in place of 8A, and full overvoltage, overcurrent and overpower protection. Radios, Matter, Zigbee router mode, the contacts and the need for a neutral on mains power stay the same, but the relay grows to full size. If your Shelly 1 Mini Gen4 switches a light and you have no interest in consumption data, keep it.
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 1 Mini Gen4
- Shelly 1PM Gen4
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Frequently Asked Questions
Which is better overall: Shelly 1 Mini Gen4 or Shelly 1PM Gen4?
The Shelly 1PM Gen4, for its energy monitoring, 16A rating and full electrical protection. The Shelly 1 Mini Gen4 is the smaller, lower priced relay for lights and dry-contact jobs in tight boxes.
What is the difference between the Shelly 1PM Gen4 and the Shelly 1 Mini Gen4?
The Shelly 1PM Gen4 meters power, switches 16A and protects against overvoltage, overcurrent and overpower. The Shelly 1 Mini Gen4 is smaller, switches 8A and has no metering. Both share Wi-Fi, Bluetooth, Zigbee and Matter, and both need a neutral on mains power.
Does the Shelly 1 Mini Gen4 have energy monitoring?
No. For power readings in the Gen4 line you need a PM model such as the Shelly 1PM Gen4, which reports instant power, voltage and total consumption.
Do the Shelly 1 Mini Gen4 and the Shelly 1PM Gen4 work with Zigbee?
Yes. Both can switch from Wi-Fi and Matter to Zigbee, join a network through a hub and act as Zigbee routers, and both work with Zigbee2MQTT in Home Assistant.
Who should buy the Shelly 1 Mini Gen4?
DIYers automating lights, garage doors or pool lights in crowded boxes with a neutral, who do not need consumption data.
Who should buy the Shelly 1PM Gen4?
Anyone who wants to monitor and control an appliance such as a water heater, boiler or furnace, or needs up to 16A.
Full comparison table
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