Shelly
Shelly Pro 4PM
- Native integration
- Local control
- Wi-Fi
- Bluetooth
Prices verified September 2026
See more relays & dimmer modules picks on our Amazon storefront →Our verdict
The one to reach for once you outgrow back-box modules: 4 independently metered 16A channels (40A combined) on a DIN-rail unit built for the consumer unit, not behind a switch. That makes it the practical choice for a garage door, an immersion heater, or four zones of a boiler/valve setup on one device. It ships in its own black plastic enclosure — no separate housing to source — at roughly 96×53×59mm, eating about six standard 17.5mm DIN modules of rail space. Needs a neutral at each channel and isn't works-with-HA certified (only Shelly's Z-Wave Wave range carries that badge) — but the native local Shelly integration is rock-solid.
What can Home Assistant control on the Shelly Pro 4PM?
| Control | Type | What it does |
|---|---|---|
| Switch (per channel) | Switch | Four independently addressable relay channels, each 16A rated with its own on/off state — no factory pairing into cover outputs. |
| Power (per channel) | Sensor | Per-channel active power, voltage, current, and cumulative energy, updated in near-real time from the onboard metering on each channel. |
| Input (per channel) | Binary sensor | Four dry-contact input terminals, independent of the relay channels, usable for physical switches or external contacts feeding automations. |
| Device temperature | Sensor | Internal enclosure temperature, tied to the device's overheating-protection cutoff — useful for alerting before firmware force-trips a channel under sustained high load. |
| Firmware update | Update | Supports HA-triggered OTA without going through the Shelly cloud app. |
Unlike the compact Gen3 modules, the Pro 4PM ships with a built-in Ethernet port, and the native Shelly integration will happily bind to that wired IP instead of Wi-Fi — worth forcing explicitly on a consumer-unit install, since a steel enclosure is exactly the kind of Faraday cage that produces flaky signal and phantom disconnects on Wi-Fi-only devices. It exposes four independent switch components with per-channel voltage/current/power/energy, not a paired cover profile: unlike the 2PM, there's no factory cover mode to merge two channels into a roller output, so all four stay as separate switch entities needing HA-side or script-side interlocking if you want cover-like behaviour. It also carries onboard scripting, letting you push channel-grouping or safety-interlock logic onto the device itself as a local fallback if the HA automation engine or network link goes down.
Specs
| mount | DIN rail (consumer unit / enclosure) |
|---|---|
| channels | 4 |
| enclosure | Built-in black plastic enclosure — no separate housing required |
| ip rating | Not officially published; intended for indoor consumer-unit/enclosure installation only |
| dimensions mm | 96 x 53 x 59 |
| din rail modules | ~6 (approx., based on standard 17.5mm module width) |
| max load a total | 40 |
| neutral required | true |
| power monitoring | true |
| max load a per channel | 16 |
How does the Shelly Pro 4PM compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| Shelly Pro 4PM (this product) | £84.64 | Wi-Fi, Bluetooth | Yes | Native |
| Aqara Dual Relay Module T2 | £29.74 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Single Switch Module T1 (No Neutral) | £26.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Candeo Zigbee Dimmer Module (C-ZB-DM204) | £39.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
Frequently asked questions
- Does the Shelly Pro 4PM work with Home Assistant locally?
- Yes. The Shelly Pro 4PM is controlled locally in Home Assistant through a built-in Home Assistant core integration (shelly), so it keeps working if your internet connection or the Shelly cloud goes down. Control and state updates stay on your own network.
- Which protocol does the Shelly Pro 4PM use, and do I need a hub?
- The Shelly Pro 4PM uses Wi-Fi and Bluetooth. To pair it with Home Assistant you need no hub — it joins your Wi-Fi network directly; or a Bluetooth adapter on your Home Assistant host or an ESPHome Bluetooth proxy. Shelly's own hub is not required when you integrate through a built-in Home Assistant core integration (shelly).
- How much does the Shelly Pro 4PM cost in the UK?
- The lowest price we have listed for the Shelly Pro 4PM is £84.64 at Amazon UK, with other UK retailers at up to £111.99. Prices were last checked in September 2026 and change often, so confirm on the retailer's page before buying.