# Shelly 2L Gen4

*Shelly / S4SW-0A2X4EUL*

> The Shelly 2L Gen4 needs no neutral wire and comes set up for Matter, with Zigbee as the alternative. It is a two-channel in-wall relay. It suits HomeKit users, with native support through Matter over Wi-Fi. Google Home, Alexa and SmartThings users reach it through an integration (the maker's cloud). Home Assistant users reach it through an integration (local Wi-Fi control).

- Canonical page: https://smarthomecanon.com/devices/shelly-2l-gen4
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Shelly](https://smarthomecanon.com/brands/shelly) |
| Category | Relay module |
| Model numbers | S4SW-0A2X4EUL |
| Status | Current[^1][^2] |
| Generation | Gen4[^3] |
| Model code | S4SW-0A2X4EUL[^4] |
| Power measurement | Internal temperature only[^4] |
| Neutral wire | No neutral needed (Shelly Bypass included)[^4] |
| Max load | 200 W through the first output, 700 W through the second, at 240 V~[^4] |
| Mounting | In-wall[^4] |
| Radio | Wi-Fi (802.11 b/g/n), Bluetooth 4.2, Zigbee[^4] |
| Matter | Built in (default). Zigbee is the alternate profile.[^4] |
| Local API | HTTP API, MQTT and webhooks[^4][^5] |

## Integration paths

**How the Shelly 2L Gen4 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) | Matter controller[^4] | unknown | unknown |
| [Zigbee](https://smarthomecanon.com/protocols/zigbee) | Zigbee coordinator[^4] | unknown | unknown |
| [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 2L Gen4**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter / Wi-Fi | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Native[^6] |  |
| 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.control |
| Wi-Fi cloud | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^4] |  |
| Wi-Fi cloud | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^4] |  |
| Wi-Fi cloud | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Via integration[^4] |  |

## Related pages

- [Shelly relays by generation](https://smarthomecanon.com/lines/shelly-relays) (line)
- [Shelly](https://smarthomecanon.com/brands/shelly) (brand)
- [Matter over Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) (protocol)
- [Zigbee](https://smarthomecanon.com/protocols/zigbee) (protocol)
- [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)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)

## Sources

[^1]: Shelly 2L Gen4 - Shelly Europe shop. https://www.shelly.com/products/shelly-2l-gen4 (manufacturer, checked 2026-10-09)
[^2]: Shelly Europe shop catalog (Shopify product feed, pages 1-3). https://www.shelly.com/products.json?limit=250&page=1 (manufacturer, checked 2026-10-09)
[^3]: Shelly Gen4 devices - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-gen4-devices (manufacturer, checked 2026-10-09)
[^4]: Shelly 2L Gen4 - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-2l-gen4 (manufacturer, checked 2026-10-09)
[^5]: Shelly Technical Documentation. https://shelly-api-docs.shelly.cloud/ (manufacturer, checked 2026-10-09)
[^6]: Shelly Group introduces multiprotocol connectivity at CES 2025 (2025-01-06). https://www.shelly.com/blogs/media-kit/shelly-group-introduces-multiprotocol-connectivity-at-ces-2025 (manufacturer, checked 2026-10-09)