Shelly Pro 4PM
Quick take
Shelly Pro 4PM is a four-channel DIN-rail smart relay designed for breaker-box installs, combining Wi-Fi plus LAN connectivity with integrated precision power meters for independent channel monitoring. It is best for buyers who want remote control and scheduling of multiple circuits, and also want energy data per output. The main caveat is install and wiring discipline, plus the need to ensure a strong Wi-Fi signal (or rely on LAN) for dependable connectivity.
Pros and cons
Pros
- Four independent relay channels with built-in power metering per channel, for monitoring and automation.
- Works with Wi-Fi and LAN, and supports common smart home platforms (including Alexa and Google Home).
- Built-in scheduling and scripting features for automations like timed control and rules.
- DIN-rail design intended for breaker-box installs, keeping the smart hardware compact (about 96 x 53 x 59 mm).
Cons
- Not a “plug-and-play” device for most buyers, because it is meant to be installed inside the breaker box with proper wiring.
- Some users flag practical wiring/connector ergonomics, which can affect ease of working with standard wire gauge.
- Wi-Fi reliability depends on signal strength, and weak reception can cause disconnects unless you optimize network settings.
- Load control limits matter, with up to 16 A per channel and up to 40 A total for the device.
What buyers think
Buyer feedback highlights two recurring strengths: ease of setup and strong integration potential with home automation platforms. Multiple users describe getting the unit running quickly with the Shelly app and then using it alongside Home Assistant for relay automation and control. The other theme is practical day-to-day usefulness, particularly for controlling multiple loads (lights, fans, and other switched equipment) and leveraging the metering/scheduling capabilities for monitoring and cost awareness.
At the same time, review evidence is limited on long-term reliability and advanced metering accuracy, but it is enough to say that setup success tends to be tied to being comfortable with wiring and being intentional about network quality. Some buyers also mention physical connector constraints that can make standard wiring less convenient.
What is shelly pro 4PM?
Shelly Pro 4PM is a single-phase, four-channel smart relay module built for DIN-rail mounting inside an electrical panel. Each channel can be controlled and monitored, thanks to integrated precision power metering. It supports local and remote control via both Wi-Fi and LAN, and it includes features for automation such as weekly scheduling and custom scripting.
Key specs that matter for buyers
- Channels: 4 independent relay outputs.
- Power monitoring: 4 integrated precision power meters, one per channel.
- Switching limits: up to 16A per channel, up to 40A total for the device.
- Power supply: AC 110 to 230V (50/60Hz).
- Connectivity: Wi-Fi and LAN (also acts as a Bluetooth gateway for smart home connectivity and automation workflows).
- Automation options: weekly schedules, sunrise/sunset timing, and custom scripts (mJs), plus HTTP/HTTPS webhooks.
- Protection: designed with temperature, overload, and overvoltage load protection for safer panel installs.
Performance and real-world use cases
Where this module tends to fit best is when you want multiple switched loads managed from one place, and you also care about seeing energy consumption rather than treating outlets as black boxes. Typical scenarios include controlling lighting circuits, attic or workshop ventilation, garage accessories, and other switched equipment where energy visibility helps refine run times or automate based on conditions.
Because it has per-channel metering, you can build automations around usage patterns (for example, monitoring which circuit is drawing more power) rather than relying only on simple on/off states. The four outputs also make it practical when you need more than a single relay but do not want separate devices for every circuit.
Pros and cons (detailed)
Pros: why buyers choose it
- Per-channel energy monitoring with switching: you can control and measure each output independently, which is useful for cost tracking and smarter schedules.
- Flexible connectivity: Wi-Fi and LAN give you options, which can be important if your panel area has spotty Wi-Fi.
- Automation features beyond basic relay control: weekly scheduling, sunrise/sunset support, and custom scripts let you tailor rules to your setup.
- Designed for breaker-box installs: DIN-rail form factor and panel-friendly protections make it suitable for home, office, store, or light industrial environments.
Cons: what to watch before buying
- Installation complexity is real: this is a DIN-mount module intended for inside the breaker box, so you need to be comfortable with proper wiring and load sizing.
- Connector ergonomics may be limiting: at least some users report that certain terminals are smaller than others, which can complicate standard wire gauge work (for example, when you want to use ferrules).
- Wi-Fi stability depends on signal strength: if you plan to rely on Wi-Fi, you should be prepared to optimize router placement, Wi-Fi channel behavior, and network settings, or consider LAN for steadier connectivity.
- Load limits determine “how much” you can control: staying within 16A per channel and 40A total matters. If your loads are higher, you may need a different approach (for example, using appropriately sized downstream control hardware).
Compatibility and ecosystem
The Shelly Pro 4PM is positioned for smart home control and commonly referenced integrations, including Alexa and Google Home. It is also described as compatible with systems such as SmartThings and Home Assistant, which is a big reason it shows up in automation-focused setups.
Price and availability
Pricing varies by retailer and timing, but it is generally positioned as a premium smart relay module due to the built-in per-channel power metering and panel-ready DIN-rail design. Check the current listing for the latest price and shipping details.
Who should buy Shelly Pro 4PM?
- You want four controlled circuits in one DIN-rail module, with remote control and automation.
- You care about energy monitoring per circuit, not just turning loads on and off.
- You are building automations in an ecosystem like Home Assistant or a similar platform where relay control is only part of the workflow.
- Your installation location can support reliable Wi-Fi, or you can use LAN for steadier connectivity.
Who should avoid it?
- If you are looking for a low-complexity plug-in device, this panel-style DIN module is likely not the right fit.
- If your planned loads regularly exceed 16A per channel or you cannot reliably stay within device-level capacity, you should reassess your setup.
- If you cannot ensure good network coverage and have no LAN option, Wi-Fi reliability could be a concern.
- If you need dry contact or normally-closed switching for your exact wiring requirements, you may want to confirm the relay type and downstream control approach first.
Verdict
Shelly Pro 4PM is a strong choice for buyers who want DIN-rail smart control with per-channel power metering, scheduling, and automation-ready features in one four-output module. It is especially compelling for energy-aware automation projects and setups that benefit from both Wi-Fi and LAN. The tradeoff is that it is designed for electrical-panel installation and network conditions matter, so it is best for buyers who plan the wiring and connectivity carefully.
FAQ
Is Shelly Pro 4PM easy to set up?
Many users report quick setup with the Shelly app and then integration into home automation platforms. Because it is a DIN-rail breaker-box module, you still need correct wiring and load sizing for the installation.
Does shelly pro 4PM work with alexa and google home?
Yes. It is designed to work with popular smart home ecosystems, including Alexa and Google Home.
How many circuits can it control?
It has four independent relay channels, intended to control up to four separate loads.
Does Shelly Pro 4PM measure power consumption?
Yes. It includes four integrated precision power meters, enabling independent monitoring for each channel.
Is Wi-Fi reliable, or should I use LAN?
It supports both Wi-Fi and LAN. Wi-Fi reliability can depend on signal strength in the installation area, so using LAN is a good option if your breaker-box location struggles with Wi-Fi reception.
What is the maximum load for Shelly Pro 4PM?
It supports up to 16A per channel and up to 40A total for the device, at 110 to 240V.
Specifications
| Product Title | Shelly Pro 4PM | Wi-Fi & LAN, 4-Channel Smart Relay with Power Metering | Home Automation | Compatible with Alexa & Google Home | iOS Android App| Remote Appliances Control and Monitoring |
|---|---|
| Category | Tools & Home Improvement > Electrical > Home Automation Devices > Modules |
| Manufacturer | Allterco Robotics LTD. |
| Item Weight | 150 Grams |
| Connector Type | Screw |
| Contact Type | Normally Open |
| Current Rating | 40 Amps |
| Mounting Type | DIN Rail Mount |
| Operation Mode | Automatic |
| Wattage | 9600 watts |
| Contact Current Rating | 16 Amps |
| Maximum Switching Current | 40 Amps |
| Upper Temperature Rating | 105 Degrees Fahrenheit |
| Smart Home Compatibility | Smart Home Compatible |
| Specification Met | CE, RoHS |
| Contact Material | Steel |
| Brand Name | Shelly |
| Part Number | 804 |
| Model | 3800235268049 |
| Unit Count | 1.0 Grams |
| Included Components | 1 x Shelly Pro 4PM, User manual |
| Global Trade Identification Number | 03800235268049 |
Available variants
Style
- PRO 2 PM
- PRO 2
- Shelly Pro 1
- Shelly Pro Dual Cover PM
- PRO 4 PM
- PRO 3
- PRO 1 PM
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