Shelly Pro 4PM -- 4-Channel DIN Rail Smart Switch with Power Metering and Colour Display (WiFi + LAN + Bluetooth)
Four independent circuits. One DIN rail device. The Shelly Pro 4PM is a professional 4-channel smart relay with per-channel power metering, a 1.8-inch colour display, and triple connectivity. Each channel supports up to 16A with a total device capacity of 40A. Monitor and control four separate circuits from a single DIN rail module -- lights, fans, pumps, heaters -- each with independent energy tracking. The built-in colour screen shows real-time status and power readings at the panel without needing a phone. Supports KNXnet/IP for commercial building management. WiFi + Ethernet + Bluetooth. No hub or subscription required. Made in Bulgaria.
Key Features
- 4 Independent Channels, 16A Each -- switch four separate circuits with a total device capacity of 40A (4 x 3,680W at 230V); each channel operates independently
- Per-Channel Power Metering -- real-time voltage, current, active power, and accumulated kWh for each of the four channels separately
- 1.8-Inch Colour Display -- built-in screen shows channel status, power readings, and network info directly at the DB board; no phone required for quick checks
- 4 Switch/Button Inputs -- connect up to 4 existing wall switches or push buttons (S1-S4) for physical control of each channel
- Triple Connectivity -- WiFi 802.11 b/g/n, Ethernet RJ45, and Bluetooth 4.2; Ethernet provides reliable wired connectivity inside metal panels
- KNXnet/IP Support -- integrates with KNX building management systems for commercial installations
- Overpower and Overvoltage Protection -- configurable thresholds per channel protect loads and the device
- Smart Scheduling -- up to 20 schedules per device including sunrise/sunset-based automation
- Scripting (mJS) -- custom on-device JavaScript automations for complex logic, load sequencing, or conditional switching
- Home Assistant Native -- auto-discovered; each channel appears as a separate switch with energy entities for the HA Energy Dashboard
- MQTT, HTTP, WebSocket -- full API access for custom integrations, dashboards, and building management
- Voice Control -- Amazon Alexa, Google Home, Samsung SmartThings
- No Hub or Subscription Required -- fully standalone operation
Perfect For
Multi-Zone Lighting
Control 4 lighting zones from one DIN module. Monitor energy per zone. Schedule each independently. One device replaces four separate relays.
Commercial Buildings
KNXnet/IP integration for professional BMS. Per-channel metering for tenant billing. Ethernet for reliable panel connectivity. Colour display for maintenance staff.
Whole-House Automation
Geyser on channel 1, pool pump on 2, garage on 3, outdoor lights on 4. Each with independent scheduling and energy tracking. View everything on one colour display.
Solar Load Management
Use scripting to prioritise loads based on available solar. Shed non-critical circuits first. Monitor each load's consumption independently.
Technical Specifications
| Product | Shelly Pro 4PM |
| Model | SPSW-104PE16EU |
| Type | 4-Channel DIN Rail Smart Switch with Power Metering |
| Channels | 4 (independent) |
| Max Current per Channel | 16A |
| Total Device Capacity | 40A |
| Max Switching Voltage | 240V AC |
| Power Supply | 110-240V AC, 50/60 Hz |
| Power Consumption | Less than 4W |
| Metering | Voltage, current, active power, accumulated energy (kWh) per channel |
| Display | 1.8-inch colour screen with navigation keys |
| Switch Inputs | 4 (S1-S4) -- switch or push-button |
| Relay Outputs | 4 (O1-O4) |
| WiFi | 802.11 b/g/n (2.4 GHz) |
| Ethernet | RJ45 (LAN) |
| Bluetooth | 4.2 |
| CPU / Flash | ESP32-D0WDQ6 / 8 MB |
| Schedules | 20 |
| Scripting | mJS (on-device) |
| Protocols | MQTT, HTTP, WebSocket, Webhooks, KNXnet/IP, TLS |
| Mounting | DIN rail (4 modules wide) |
| Dimensions (H x W x D) | 96 x 53 x 59 mm |
| Colour | Black |
| Shell Material | Plastic |
| Operating Temperature | -20 to 40 degrees C |
| Humidity | 30-70% RH |
| Works With | Home Assistant, Alexa, Google Home, Samsung SmartThings, KNX |
| Hub Required | No |
| Made In | Bulgaria |
What is in the Box
1 x Shelly Pro 4PM
1 x Installation Guide
Frequently Asked Questions
Can each channel be controlled independently?
What does the colour display show?
Can it handle 40A total?
Does it work with Home Assistant?
How wide is it on the DIN rail?
Need Help? We are Here for You!
Visit Us
8 Wildebraam Street
Weltevreden Park, Roodepoort
Gauteng, 1709
Four Circuits. One Device. Complete Control.
4-channel relay with per-channel metering, colour display, Ethernet, and KNX support.
