Description
Shelly PM Mini Gen3 Compact Wi-Fi Power Meter for Real-Time Energy Monitoring
Take control of your energy data with the Shelly PM Mini Gen3, an ultra-compact Wi-Fi power meter and energy monitoring module designed to measure electrical consumption without switching or interrupting the connected load.
Unlike a smart relay such as the Shelly 1PM, the PM Mini Gen3 is dedicated entirely to power measurement. There is no relay to turn equipment on or off. Instead, it continuously monitors the electrical parameters of the connected circuit and provides detailed information that can be used for energy management, troubleshooting and smart home automation.
With support for loads up to 16A / 3840W at 240V AC, the Shelly PM Mini Gen3 is ideal for monitoring individual appliances, lighting circuits, heaters, pumps and other compatible electrical loads.
Its exceptionally small 29 × 34 × 16 mm enclosure makes it easy to install in compact electrical boxes, behind switches and sockets, or inside suitable equipment.
⚡ Accurate Real-Time Power Monitoring
The Shelly PM Mini Gen3 provides detailed electrical measurements so you can see exactly what your connected equipment is consuming.
Monitor:
- Voltage (V)
- Current (A)
- Power (W)
- Energy consumption
This makes it easy to identify energy-intensive appliances and understand how different devices contribute to your electricity usage.
For example, you could use it to monitor:
A geyser
See when the element switches on and how much power it consumes during heating.
A pool pump
Track daily operating consumption and identify unexpected changes.
A refrigerator
Monitor its normal operating pattern and detect unusual behaviour.
A server or network rack
Track the power consumption of always-on equipment.
A lighting circuit
Measure the actual electricity usage of a group of lights.
🔌 Monitoring Without Switching
One of the most important differences between the Shelly PM Mini Gen3 and a smart relay is that the PM Mini Gen3 does not switch the connected load.
There is no relay.
This makes it particularly useful when you want to add energy monitoring to a circuit while leaving the existing switching or control equipment completely unchanged.
Choose the PM Mini Gen3 when you want:
- Accurate energy measurement
- No relay switching
- No interruption to existing control systems
- Compact installation
- Wi-Fi connectivity
- Local access to energy data
Choose a Shelly 1PM when you also need:
- Remote ON/OFF control
- Relay switching
- Automated load control
This makes the PM Mini Gen3 an excellent monitoring-only solution.
📊 Understand Where Your Electricity Is Going
Energy monitoring becomes much more useful when you can measure individual circuits or appliances.
The PM Mini Gen3 can help you identify:
- High-energy appliances
- Unexpected standby consumption
- Changes in appliance behaviour
- Excessive running times
- Energy-intensive heating cycles
- Equipment that may require maintenance
Instead of relying on estimated consumption, you can use actual electrical measurements to understand your home’s energy usage.
🏠 Perfect for Home Assistant
The Shelly PM Mini Gen3 is an excellent addition to a Home Assistant installation.
Feed real-time electrical data into your smart home and use it to build energy dashboards, notifications and automations.
For example:
Geyser Monitoring
Track when the geyser is heating and how much electricity each heating cycle uses.
Appliance Monitoring
Create individual energy sensors for important appliances.
Energy Dashboards
Combine multiple Shelly meters to build a detailed view of household electricity consumption.
Smart Notifications
Receive an alert when an appliance consumes more power than expected.
Fault Detection
Use unusual power consumption patterns as an indication that equipment may not be operating normally.
📡 Wi-Fi – No Dedicated Hub Required
The Shelly PM Mini Gen3 connects directly to your 2.4 GHz Wi-Fi network, so no dedicated gateway is required for standard Wi-Fi operation.
Access measurements through the Shelly Smart Control app, local web interface and compatible smart home platforms.
This makes it easy to add energy monitoring to an existing installation without deploying another proprietary hub.
🌐 Powerful Local Connectivity
The PM Mini Gen3 is designed with local smart home integration in mind.
It supports technologies and protocols including:
- MQTT
- Webhooks
- mJS scripting
- HTTPS
- UDP
- TLS
- Local web interface
This gives advanced users considerable flexibility when integrating the meter into custom automation systems and platforms such as Home Assistant.
📶 Bluetooth Gateway & Wi-Fi Features
In addition to Wi-Fi connectivity, the PM Mini Gen3 includes Bluetooth functionality.
It can act as a Bluetooth gateway for compatible Shelly devices, providing another way to integrate Shelly BLU devices into your smart home.
The device also supports Wi-Fi range-extending functionality, helping make it more than just a simple energy meter.
📐 Extremely Compact Design
The PM Mini Gen3 is designed for installations where space is limited.
At only:
29 × 34 × 16 mm
it can fit into many locations where larger energy monitors simply won’t.
Ideal installation locations can include suitable:
- Wall boxes
- Distribution enclosures
- Electrical cabinets
- Appliance enclosures
- Switch boxes
- Socket boxes
Its small footprint makes it particularly attractive for retrofit energy monitoring projects.
🔎 Ideal Applications
The Shelly PM Mini Gen3 can be used for a wide range of energy monitoring applications.
🚿 Geyser & Water Heater Monitoring
Monitor heating cycles and electricity consumption.
🏊 Pool Pumps
Measure operating power and daily energy usage.
❄️ Air Conditioning
Track how much electricity an air conditioner consumes.
🔥 Heaters
Monitor high-energy heating equipment.
💡 Lighting
Measure consumption from individual lighting circuits.
🖥️ IT & Networking
Monitor servers, network racks, NAS systems and other always-on equipment.
🍳 Kitchen Appliances
Track ovens, refrigerators, dishwashers and other appliances.
☀️ Solar & Energy Management
Use accurate load measurements as part of a broader solar or energy-management system.
🧠 Small Device, Powerful Data
The Shelly PM Mini Gen3 is particularly useful when you don’t need another smart switch—you simply need accurate information.
Install it behind an existing installation and keep your current switches, timers, contactors or controllers exactly as they are while adding detailed energy monitoring.
This makes it a useful tool for both smart home automation and electrical energy analysis.
Shelly PM Mini Gen3 vs Shelly 1PM Gen3
If customers are unsure which product they need, this comparison can be useful:
| Feature | Shelly PM Mini Gen3 | Shelly 1PM Gen3 |
|---|---|---|
| Power Monitoring | ✓ | ✓ |
| Voltage Measurement | ✓ | ✓ |
| Current Measurement | ✓ | ✓ |
| Energy Measurement | ✓ | ✓ |
| Relay | No | Yes |
| Remote ON/OFF | — | ✓ |
| Automated Switching | — | ✓ |
| Maximum Measurement | 16A | 8A |
| Wi-Fi | ✓ | ✓ |
| Bluetooth | ✓ | ✓ |
| Home Assistant | ✓ | ✓ |
| Best For | Monitoring | Monitoring + Control |
In short: the PM Mini Gen3 measures; the 1PM Gen3 measures and switches.
Technical Specifications
| Specification | Details |
|---|---|
| Product | Shelly PM Mini Gen3 |
| Model | S3PM-001PCEU16 |
| Type | Wi-Fi power meter / energy monitor |
| Relay | None – metering only |
| Maximum Measurement | 16A |
| Maximum Power | 3840W @ 240V AC |
| Power Supply | 110–240V AC |
| Measurements | Voltage, current, power & energy |
| Wi-Fi | 802.11 b/g/n, 2.4 GHz |
| Bluetooth | Bluetooth 4.2 |
| Cloud | Shelly Smart Control |
| Local Control | Yes |
| MQTT | Supported |
| Webhooks | Supported |
| Scripting | mJS |
| Dimensions | 29 × 34 × 16 mm |
| Weight | Approx. 13 g |
| Colour | Light Grey / White |
Why Choose the Shelly PM Mini Gen3?
The Shelly PM Mini Gen3 is one of the simplest ways to add detailed electrical monitoring to an existing installation.
Its combination of 16A measurement capability, Wi-Fi connectivity, local integration, Bluetooth functionality and an ultra-compact design makes it ideal for homeowners, installers and smart home enthusiasts who want better visibility into their electricity consumption.
Whether you’re monitoring a geyser, pool pump, appliance, heater, lighting circuit or IT equipment, the PM Mini Gen3 provides the data you need to understand and optimise energy usage.
If you don’t need to switch the load and simply want accurate, connected energy monitoring, the Shelly PM Mini Gen3 is the right tool for the job.
Installation & Safety
The Shelly PM Mini Gen3 connects directly to electrical wiring and should be installed by a qualified electrician in accordance with applicable local electrical regulations.
Neutral connection is required. External 16A protection is recommended.
The PM Mini Gen3 is a metering-only device and does not provide ON/OFF switching. Always ensure the connected circuit is within the specified electrical limits before installation.
