# Energy measurement device Shelly EM+50A 50A with external CT transformer

**URL:** https://aio.lv/en/product--shelly-em50a--10840067
**Data updated:** 2026-05-18 20:28 (EEST)
**Category:** Smart Sensors
**Manufacturer:** Shelly
**Manufacturer code:** EM+50A
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--shelly-em50a--10840067

## 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

Shelly EM+50A is an energy measurement device designed for monitoring electrical consumption up to 50 A. The unit works with an external current transformer (CT) and provides accurate readings of energy usage for residential or small commercial installations. It is suitable for real-time monitoring, load analysis, and helps optimize energy usage and billing accuracy.

## Long description

Shelly EM + 50A Transformer Kit (Energy Consumption Measurement) — a combined system for monitoring and measuring electricity usage in residential or small commercial installations. The kit includes the Shelly EM energy monitor and a 50A external current transformer (CT) to measure currents up to 50 A and deliver accurate readings for real-time and historical analysis. The device provides day, week, month and year consumption statistics and supports local and remote control over monitored circuits.
Advantages
The Shelly EM offers two single-phase channels for energy consumption measurement, low device energy use (below 1 W), and Wi‑Fi connectivity (802.11 b/g/n) for easy integration into existing networks. The included 50A CT has 1% accuracy, a ferrite core and a 60 cm cable, enabling precise current conversion without affecting the electrical system’s operation. Built-in functions include contactor control, overheating protection, smart on/off, weekly scheduling and sunrise/sunset automation.
Suitable for (tasks / use cases)
Real-time monitoring of household or small commercial electricity consumption
Historical usage analysis (daily, weekly, monthly, yearly)
Load monitoring and distribution between circuits
Energy cost tracking and optimization
Integration into home automation systems for remote control and scheduling
Key specifications
AC power supply: 110–230 V, 50/60 Hz
Channels: 2 channels (single-phase)
Wi‑Fi: 802.11 b/g/n; range up to 30 m indoors, up to 50 m outdoors
Device power consumption: below 1 W
Operating temperature: 0 to +40 °C
Contactor control: up to 2 A
Protection: device overheating protection (no overload protection)
Dimensions (Shelly EM): 39 x 36 x 17 mm
CT primary current: 50 A; secondary current: 16.67 mA; accuracy: 1%
CT core: ferrite; inner diameter: 11 mm; cable length: 60 cm; dimensions: 23.5 x 41.5 x 26 mm
CT electrical strength: 3000 VAC 1 mA 60 s; load resistance: 20 Ω; saturation current ≥85 A
Compatibility: Shelly EM
How to use
Install the Shelly EM in an appropriate electrical enclosure and connect its AC power supply (110–230 V). Fit the 50A current transformer around the conductor to be measured and route the CT cable to the Shelly EM input following the manufacturer’s wiring diagram. Configure Wi‑Fi settings and set up channels in the Shelly app or web interface to view real‑time and historical consumption data. Use contactor control and scheduling features to automate switching where required.
Usage recommendations
Ensure installation is performed by a qualified electrician. Verify CT orientation and secure connections before powering the circuit. Do not exceed the CT primary current rating (50 A); allow for proper ventilation and keep the device within the specified operating temperature range.

## FAQ

### How much does the Shelly EM+50A energy measurement device cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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. All transactions are 100% secure and encrypted.

### 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

## Image

https://aio.lv/img/cache/product/10840067/60187336_large.webp