# Energy cost meter AC Shelly Pro 3EM-400A 400 A 50-60 Hz

**URL:** https://aio.lv/en/product--shelly-217050--10490258
**Data updated:** 2025-12-30 08:44 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Shelly
**Manufacturer code:** 217050
**EAN:** 3800235268117
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 306.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 253.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--shelly-217050--10490258

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The Shelly Pro 3EM-400A is an AC energy cost meter designed for monitoring energy consumption. It supports a maximum current of 400 A and operates within a frequency range of 50 to 60 Hz. With compact dimensions of 19 mm width, 69 mm depth, and 94 mm height, it is suitable for various installations. This meter provides accurate readings to help manage energy costs effectively.

## Long description

Shelly Pro 3EM-400 is a DIN-rail mountable three-phase energy meter with Wi‑Fi, Bluetooth and LAN connectivity. It reports accumulated active energy as well as instantaneous voltage, current and power factor per phase in real time. The device offers 1% active energy measurement accuracy, 60 days of on-device historical data with 1‑minute resolution per phase, and scripting capabilities for advanced monitoring and automation. Its compact form factor (19 mm width, 69 mm depth, 94 mm height) and 400 A maximum current rating make it suitable for residential and small commercial installations.
Advantages
The Shelly Pro 3EM-400 provides precise three-phase monitoring with 1% accuracy for active energy and real-time per-phase measurements of voltage, current and power factor. Built-in Wi‑Fi, Bluetooth and LAN connectivity enable flexible integration into local networks and professional systems. On-device historical storage for up to 60 days with 1‑minute granularity and scripting support allow detailed analysis and customized automation without immediate cloud dependency. DIN-rail form factor and compact dimensions simplify installation inside distribution boards.
Suitable for
Monitoring household energy consumption and individual appliances
Measuring electrical circuits in small businesses and offices
Integration into professional automation and energy management systems
Retrofit installations inside DIN-rail electrical panels
Key specifications
Model: Shelly Pro 3EM-400 (MPN 217050, EAN 3800235268117)
Type: Three-phase AC energy meter, DIN-rail mountable
Max current: 400 A
Frequency: 50–60 Hz
Measurement accuracy: 1% (active energy)
Connectivity: Wi‑Fi, Bluetooth, LAN
Historical data: Up to 60 days on-device, 1-minute resolution per phase
Dimensions: 19 mm (W) × 69 mm (D) × 94 mm (H)
Weight: 0.062 kg
How to use
Install the Shelly Pro 3EM-400 on a standard DIN rail inside the distribution board and connect the three-phase conductors following local electrical regulations and the product wiring diagram. Connect the device to the local network via Wi‑Fi or LAN for remote monitoring and configuration, or use Bluetooth for initial setup. Use the Shelly management interface to view real-time readings, review historical data, configure scripts and set up integrations with home automation or energy management platforms.
Usage recommendations
Follow applicable national and local electrical codes when installing and wiring the meter. Ensure connections are made by a qualified electrician and verify the device is rated for the installation's maximum current. Regularly back up any required historical data if long-term storage is needed beyond the on-device 60-day period.

## Specifications

| Feature | Value |
|---|---|
| Flash memory | 16 MB |
| Operating relative humidity (H-H) | 30 - 70 |
| Material | Plastic |
| Operating temperature (T-T) | -20 - 40 |
| Bluetooth version | 4.2 |
| Ethernet LAN | Yes |
| Wall mountable | Yes |
| Bluetooth | Yes |
| Maximum current | 400 A |
| Wi-Fi | Yes |
| Maximum power | 3 W |
| Frequency range | 50 - 60 |
| Accuracy | 1 % |
| Maximum operating altitude | 2000 m |
| Power source type | AC |
| DIN rail mounting | Yes |
| Cable section | 0.5 - 2.5 |
| Temperature sensor | Yes |
| Microcontroller model | ESP32-D0WDQ6 |
| Top Wi-Fi standard | Wi-Fi 4 (802.11n) |
| Maximum tightening torque | 0.4 N⋅m |
| Wi-Fi range | 50 m |
| Webhooks (URL actions) | Yes |
| Stripped wire length | 6 - 7 |
| Voltmeter (RMS for each phase) | 100 - 260 |
| Ammeter accuracy | 1 - 2 |

### Weight & dimensions

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

## FAQ

### How much does the Energy cost meter AC Shelly Pro 3EM-400A cost, and is it available for purchase?

The price is 306.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 683 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 01.07.2026 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 Energy cost meter AC Shelly Pro 3EM-400A 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 Shelly 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 Shelly 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/10490258/59771825_large.webp