# Shelly Pro 3EM DIN Rail Three-Phase Energy Meter

- Canonical URL: https://www.netxl.com/energy-management/shelly-pro-3em-120a-smart-switch/
- Brand: Shelly
- SKU / part number: SHELLY-PRO-3EM-120A
- EAN (GTIN-13): 3800235268100
- Category: Energy Management (https://www.netxl.com/energy-management/)

## Pricing (GBP, guest pricing — trade customers see account pricing via the API)
| Quantity | ex VAT | inc VAT |
| --- | --- | --- |
| 1+ | £125.45 | £150.54 |
| 5+ | £125.45 | £150.54 |
| 10+ | £125.45 | £150.54 |

## Availability and shipping
- Availability: 18 in stock
- Shipping: Royal Mail Tracked - Next Working Day — £7.19, 1 working day(s)

## Description

The Shelly Pro 3EM is a DIN rail mountable three-phase energy meter featuring built-in Ethernet, WiFi, and Bluetooth connectivity. Offering high-precision energy measurement with 1% accuracy, local data logging for up to 45 days, it provides comprehensive real-time power monitoring for smart energy systems.

The Shelly Pro 3EM is a professional-grade, DIN rail mountable three-phase energy meter engineered for residential, commercial, and industrial applications. Capable of measuring voltage, current, active power, and apparent power per phase in real time, this device delivers 4-quadrant measurement with Class B active energy accuracy (1%).
Featuring tri-connectivity via Ethernet, WiFi, and Bluetooth, the Pro 3EM seamlessly connects to your local network or automation server using open protocols such as MQTT, HTTP, and WebSockets. Data is securely logged on board for at least 45 days at 1-minute intervals, ensuring records remain intact even during network disruptions thanks to an integrated real-time clock.
Designed for flexibility, the meter supports both three-phase and single-phase installations using non-contact current transformer connections. External load control can be added via an optional Shelly Pro Switch Add-on module.

## Key highlights

- Three-phase energy metering
- Class B active energy accuracy (1%)
- 4 quadrant measurement
- Ethernet, WiFi and Bluetooth connectivity
- 45-day local data logging
- DIN rail mountable design
- Photovoltaic ready

## Specifications

| Specification | Value |
| --- | --- |
| WiFi | 1 |
| WiFi 4, 5, 6 or 7 | WiFi 4 |
| Colour | White |
| Purpose | Energy Monitoring |
| Bluetooth | 1 |
| Product Series | Pro |
| Power Metering Capability | 1 |
| Location | Indoor |

## Programmatic access

- This page in HTML: append a trailing slash instead of `.md`
- NetXL Customer API (real-time customer pricing, stock, ordering): https://api.netxl.com — OpenAPI at https://api.netxl.com/openapi.yaml
- MCP server for AI agents: https://mcp.netxl.com
- Machine-readable site index: https://www.netxl.com/llms.txt
- API documentation: https://www.netxl.com/api-docs.md