# Shelly EM Gen3

*Shelly / S3EM-002CXCEU*

> The Shelly EM Gen3 is a single-phase energy meter with two current-transformer channels and a dry-contact relay output. A 50 A clamp comes with it, and the shop also lists EM kits with clamps. It suits Home Assistant users through an integration (local Wi-Fi control).

- Canonical page: https://smarthomecanon.com/devices/shelly-em-gen3
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Shelly](https://smarthomecanon.com/brands/shelly) |
| Category | Energy meter |
| Model numbers | S3EM-002CXCEU |
| Status | Current[^1][^2] |
| Generation | Gen3[^3] |
| Model code | S3EM-002CXCEU[^4] |
| Measurement | Single-phase, two channels, up to 80 A with current transformers[^4] |
| Current sensing | Current transformers: 50 A included, 80 A compatible[^4] |
| Relay output | Dry contact, 2 A at 240 V~[^4] |
| Mounting | Wall box or electrical cabinet[^4] |
| Radio | Wi-Fi, Bluetooth 4.2[^4] |
| Matter | unknown |
| Local API | HTTP API, MQTT and webhooks[^4][^5] |

## Integration paths

**How the Shelly EM Gen3 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Wi-Fi local](https://smarthomecanon.com/protocols/wifi-local) | withheld | withheld | unknown |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | Vendor cloud account[^4] | No[^4] | unknown |

**Platform support for the Shelly EM Gen3**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Wi-Fi local | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | Shelly |
| Wi-Fi local | [Homey](https://smarthomecanon.com/platforms/homey) | withheld | cloud.shelly |

## Related pages

- [Shelly energy meters](https://smarthomecanon.com/lines/shelly-energy-meters) (line)
- [Shelly](https://smarthomecanon.com/brands/shelly) (brand)
- [Wi-Fi with local control](https://smarthomecanon.com/protocols/wifi-local) (protocol)
- [Wi-Fi through a cloud service](https://smarthomecanon.com/protocols/wifi-cloud) (protocol)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: Shelly EM Gen3 - Shelly Europe shop. https://www.shelly.com/products/shelly-em-gen3 (manufacturer, checked 2026-10-13)
[^2]: Shelly Europe shop catalog (Shopify product feed, pages 1-4). https://www.shelly.com/products.json?limit=250&page=1 (manufacturer, checked 2026-10-13)
[^3]: Shelly Gen3 devices - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-gen3-devices (manufacturer, checked 2026-10-13)
[^4]: Shelly EM Gen3 - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-em-gen3 (manufacturer, checked 2026-10-13)
[^5]: Shelly Technical Documentation. https://shelly-api-docs.shelly.cloud/ (manufacturer, checked 2026-10-13)