# Shelly Pro 3EM energy cost meter AC 120 A 50-60 Hz

**URL:** https://aio.lv/en/product--oem-allshellypro3em--11241146
**Data updated:** 2026-02-20 09:15 (EET)
**Category:** Smart Sensors
**Manufacturer:** OEM
**Manufacturer code:** ALL\_SHELLY\_PRO\_3EM
**EAN:** 3800235268100
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 125.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 104.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-allshellypro3em--11241146

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Shelly Pro 3EM is an AC energy cost meter with a maximum current of 120 A and a frequency range of 50-60 Hz. Its compact size (94 mm x 19 mm x 69 mm) makes it suitable for various installations. This device allows for precise monitoring of energy consumption, helping users to manage energy costs effectively.

## Long description

Shelly Pro 3EM energy cost meter AC 120 A 50-60 Hz is a DIN-rail mountable three-phase energy meter designed for precise monitoring of electrical consumption in residential, commercial and industrial installations. The compact form factor (94 mm x 19 mm x 69 mm) houses measurement for three phases with active energy accuracy of 1% and four-quadrant capability to record both imported and exported energy. The device reports accumulated energy as well as instantaneous voltage, current and power factor per phase in real time and stores on-device historical data with 1-minute resolution for up to 60 days.
Advantages
Shelly Pro 3EM combines Wi‑Fi, LAN and Bluetooth connectivity with industry-grade security including mTLS for MQTT, HTTP and secure outbound WebSockets, enabling seamless integration with local or cloud infrastructures. Built-in MODBUS support and fast reporting intervals (configurable down to 100 ms in custom firmware) make it suitable for professional and industrial deployments. Native scripting (mjS) and webhook support allow local automation and control of other devices without relying on cloud services. The meter measures active and reactive power, supports 2-way energy accounting (production and consumption) and can monitor three separate circuits of a single-phase system.
Suitable for (tasks / use cases)
 Whole-building or panel-level energy monitoring in homes and offices
 Three-phase industrial and commercial power measurement and logging
 Monitoring solar PV or wind generation with net metering (produced vs consumed)
 Integration into building management systems using MODBUS, MQTT or WebSocket
 Local automation for load shedding, EV charging control or HVAC coordination
Key specifications
 Measurement type: three-phase AC energy meter with 4-quadrant measurement
 Maximum current: 120 A
 Frequency range: 50–60 Hz
 Accuracy class (active energy): 1% (class B)
 Connectivity: Wi‑Fi, Ethernet (LAN) and Bluetooth; simultaneous Ethernet and Wi‑Fi operation
 Protocols: MODBUS, MQTT, inbound/outbound WebSocket, UDP; mTLS support for secure connections
 Data logging: on-device historical data up to 60 days with 1-minute resolution
 Mounting: DIN rail (rail-mountable form factor)
 Local scripting: mjS scripting engine and webhook support for local automation
 Measurement outputs: instantaneous voltage, current, power, power factor and accumulated energy per phase
How to use
Install the Shelly Pro 3EM on a standard DIN rail inside your distribution board and connect the three phase conductors and corresponding current inputs according to the installation manual and local electrical codes. Connect the device to a local network via Ethernet or Wi‑Fi and configure it using Shelly's web interface or supported management tools. Use MODBUS, MQTT or WebSocket to integrate measurement data into building management systems or monitoring platforms. Configure data logging intervals, notifications and scripts to enable automated responses, energy cost tracking and historical reporting.
Usage recommendations
For accurate measurements and safe operation, ensure correct CT sizing and wiring, follow local installation standards and have a qualified electrician perform the installation. Use the device's scripting and webhook features to implement local load-shedding or PV self-consumption strategies and enable secure connections (mTLS) when integrating with external servers or cloud services.

## Specifications

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| Maximum current | 120 A |
| Wi-Fi | Yes |
| Frequency range | 50 - 60 |
| Accuracy | 1 % |
| Power source type | AC |
| AC outlet types | Hard Wire 3-wire (3PH + G) |
| Displayed energy consumption units | W, V, A |

### Features

| Feature | Value |
|---|---|
| LED indicators | LAN, Wi-Fi, Power |
| Built-in display | No |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.062 kg |
| Height | 69 mm |
| Width | 94 mm |
| Depth | 19 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 30 - 70 |
| Operating temperature (T-T) | -30 - 40 |

## FAQ

### How much does the Shelly Pro 3EM energy cost meter cost, and is it available for purchase?

The price is 125.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 200 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Shelly Pro 3EM energy cost meter be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All OEM products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized OEM service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Shelly Pro 3EM energy cost meter?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11241146/64547486_large.webp