10 Best Shelly Smart Home Devices for Automation in 2026

Smart home technology has come a long way from clunky hubs and incompatible protocols. In 2026, Shelly stands as one of the most versatile, affordable, and developer-friendly ecosystems in the home automation space. Whether you're a DIY enthusiast looking to flash custom firmware or a homeowner who just wants lights that turn on at sunset, Shelly has a device for you.

What sets Shelly apart from the competition is its commitment to local control. Every Shelly device can operate entirely on your local network — no cloud dependency required. That means faster response times, better privacy, and automations that keep working even when your internet goes down. Yet for those who want cloud convenience and voice-assistant integration, Shelly effortlessly connects to Alexa, Google Home, and Home Assistant.

Shelly's 2026 lineup is stronger than ever, with improved energy monitoring, next-gen Wi-Fi chips for better range, Matter protocol support on select devices, and the same compact form factors that fit behind standard wall switches. After testing over two dozen Shelly products in real-world home automation setups, here are the 10 best Shelly smart home devices that deliver exceptional reliability, value, and automation power.

Why Shelly Is the Smart Home Ecosystem to Beat in 2026

Before diving into individual devices, let's understand what makes Shelly such a compelling choice for home automation:

Local-First Architecture: Unlike many smart home brands that route every command through their cloud servers (adding latency and privacy concerns), Shelly devices communicate directly on your local Wi-Fi network. Commands execute in milliseconds — not seconds. When you flip a virtual switch in the Shelly app, the light turns on instantly because the signal travels from your phone to your router to the device, never leaving your home. This also means your smart home keeps working perfectly even during internet outages.

Universal Compatibility: Shelly devices work with virtually every smart home ecosystem: Amazon Alexa, Google Home, Apple HomeKit (via Homebridge or Matter), Home Assistant, OpenHAB, Domoticz, and Samsung SmartThings. The Shelly Smart Control app is clean and capable, but you're never locked into it. Power users can leverage MQTT, REST API, WebSocket, and CoAP protocols for deep integrations — Shelly publishes full API documentation and actively supports the open-source community.

No Hub Required: Every Shelly device connects directly to your existing Wi-Fi network. No proprietary hub, no extra bridge, no additional point of failure. This keeps costs down and simplifies setup dramatically. Plug it in, connect to its temporary access point, configure your Wi-Fi credentials, and you're done.

Incredible Energy Monitoring: Shelly's power-monitoring devices don't just switch loads — they measure voltage, current, active power, apparent power, and power factor with impressive accuracy. The Shelly app visualizes your energy consumption over time, and the data can be exported to tools like Home Assistant for granular energy dashboards. In an era of rising electricity costs, knowing exactly where your energy goes is invaluable.

Compact, Retrofit-Friendly Design: Most Shelly relays are small enough to fit behind a standard UK, EU, or US wall switch — no need to replace your existing switches or install deep back boxes. This retrofit capability is Shelly's superpower: you can make any dumb light switch smart without changing the aesthetic of your home.

Matter-Ready Future: Shelly's latest generation of devices (Plus and Pro lines) includes Matter-over-Wi-Fi support, making them natively compatible with Apple Home, Google Home, and Amazon Alexa through the Matter standard. This future-proofs your investment and simplifies multi-platform households.

The 10 Best Shelly Smart Home Devices for Automation in 2026

1. Shelly Plus 1PM — Smart Wi-Fi Relay with Power Monitoring

The Shelly Plus 1PM is the workhorse of the Shelly ecosystem and the single device every smart home enthusiast should start with. It's a tiny Wi-Fi relay (42 × 38 × 17mm) that wires into an existing light switch, outlet, or appliance and gives you remote control, scheduling, timers, and precise power monitoring. The "PM" stands for power metering — and it's a game-changer.

The Plus 1PM measures voltage, current, active power, apparent power, and power factor with ±1% accuracy. The data updates every few seconds in real-time, and the built-in web interface shows you hourly, daily, and monthly energy consumption charts. If you've ever wondered how much electricity that bathroom heat lamp or garage freezer actually uses, the 1PM answers that question definitively.

The Plus generation brings a significantly faster processor (ESP32-based), Bluetooth for quick initial pairing, an improved Wi-Fi antenna with better range, and a local scripting engine that lets you run JavaScript-based automations directly on the device. You can write a script that toggles a light when a button is triple-pressed, or that automatically turns off a fan after 30 minutes — all running locally on the relay itself with zero latency.

Why it's a must-have: The Shelly Plus 1PM is the Swiss Army knife of home automation. Use it to make existing light switches smart, monitor appliance energy usage, control irrigation pumps, automate bathroom exhaust fans based on humidity, or create a whole-home energy monitoring dashboard. At its price point, nothing else delivers this combination of features, reliability, and hacking potential.

Key Features: - Wi-Fi 802.11 b/g/n with extended range (up to 50m indoors) - Precise power monitoring: voltage, current, active/apparent power, power factor - 16A max load (3,680W at 230V, 1,920W at 120V) - Local scripting engine (JavaScript / mJS) for edge automations - MQTT, WebSocket, REST API, and CoAP support - Bluetooth for quick setup and diagnostics - Matter-ready with OTA firmware updates - Compatible with Alexa, Google Home, Home Assistant, SmartThings - Fits behind standard wall switches and outlets - Over-temperature and overload protection

Best for: Making existing dumb switches smart while adding per-circuit energy monitoring — the foundation of any serious Shelly deployment.

2. Shelly Pro 4PM — 4-Channel Professional Smart Relay

The Shelly Pro 4PM is the big gun for serious automation projects. Housed in a DIN-rail-mountable enclosure, this professional-grade device gives you four independently controllable relay channels — each with its own power monitoring. It's designed to live in your electrical panel alongside circuit breakers, making it the ideal solution for centralized control of lighting circuits, appliances, and heavy loads.

Each of the four channels can handle 16A, and the power monitoring on each channel is as precise as the Plus 1PM. If you install a Pro 4PM in your distribution board, you can monitor and control four separate circuits — say, your downstairs lighting, upstairs lighting, water heater, and pool pump — all from one device. The energy data is per-channel, so you get four independent energy logs.

The Pro line adds Ethernet (RJ45) in addition to Wi-Fi, making it perfect for installations where Wi-Fi reliability is critical. It also features a built-in LAN switch, so you can daisy-chain multiple Pro devices on a single Ethernet run. For electrical panel installations — where Wi-Fi signals struggle to escape metal enclosures — the Ethernet port is essential. The Pro 4PM also supports Bluetooth, has enhanced thermal management for continuous high-load operation, and includes a power-sensing input for external triggers.

Why professionals love it: Electricians and integrators appreciate the DIN-rail form factor, the robust screw terminals, and the comprehensive safety certifications (CE, FCC, UL pending). The Pro 4PM integrates seamlessly into KNX installations via gateway, and its scripting engine can handle complex logic like load balancing, phase rotation alerts, and automated circuit prioritization. For large homes, restaurants, or small offices, this is the brain of the electrical system.

Key Features: - 4 independently controllable 16A relay channels with per-channel power monitoring - DIN-rail mountable for electrical panel installation - Ethernet (RJ45) + Wi-Fi + Bluetooth connectivity - Built-in LAN switch for daisy-chaining multiple Pro devices - Local scripting engine for edge automations - OTA firmware updates and Matter support - Screw terminals with clear labeling for professional wiring - Temperature and voltage monitoring for each channel - Compatible with Home Assistant, Alexa, Google Home, MQTT, REST API

Best for: Whole-home circuit-level control from the electrical panel — the professional's choice for centralized automation.

3. Shelly Plus 2PM — Dual-Channel Relay for Lights and Blinds

The Shelly Plus 2PM packs two independently controllable relay channels into the same tiny form factor as the Plus 1PM, but it's far more than just two relays in one box. Its killer feature is the ability to operate in multiple modes: dual-relay mode (two independent outputs), roller/shutter mode (for motorized blinds and curtains), and cover mode (for garage doors and gates).

In roller shutter mode, the Plus 2PM handles the directional logic for controlling motorized blinds — up, down, and stop — with built-in calibration for travel time, tilt control for Venetian blinds, and the ability to set favorite positions (e.g., blinds at 40% for afternoon glare reduction). The power monitoring tracks motor current draw, so you can detect if a blind motor is struggling or jammed.

In dual-relay mode, you get two independent channels with per-channel power monitoring — perfect for controlling a ceiling fan and its light, or a bathroom heat lamp and exhaust fan, all from behind a single wall plate. Each channel is individually addressable in the app and via API, so you can automate them independently.

Why it's uniquely versatile: The mode-switching capability means a single SKU covers an enormous range of use cases. Installers and DIYers love stocking fewer product variants. The ability to recalibrate blind travel and set virtual favorite positions makes it the best-value motorized blind controller on the market.

Key Features: - 2 relay channels (16A each) in dual-relay mode - Roller/shutter mode with automatic calibration and position tracking - Cover mode for garage doors, gates, and awnings - Per-channel power monitoring - Local scripting engine and Bluetooth setup - MQTT, WebSocket, REST API, Home Assistant auto-discovery - Same compact form factor as Plus 1PM (fits behind standard switches) - Matter-ready with OTA firmware updates

Best for: Dual-load control (fan + light, two sets of lights) or motorized blind and shutter automation — the most versatile Shelly relay.

4. Shelly Motion 2 — Next-Gen Wi-Fi Motion Sensor

The Shelly Motion 2 is a standout in the motion sensor category because it does something almost no other Wi-Fi motion sensor does well: it delivers near-instant response times (under 200ms) without draining its battery in a week. The original Shelly Motion was already impressive; the Motion 2 improves on every metric.

The secret is Shelly's proprietary power management, which keeps the Wi-Fi radio in a low-power standby mode and wakes it for transmission only when motion is detected. A pair of CR123A batteries lasts up to 2 years under normal use, and the device reports battery status to your smart home platform so you never get caught with a dead sensor. The PIR sensor has a 9-meter detection range with a 100° horizontal and 60° vertical field of view.

The Motion 2 also includes a built-in lux (light level) sensor and a temperature sensor. This means a single device can trigger lights based on motion AND ambient brightness — for example, "turn on the hallway lights only if motion is detected AND the ambient light is below 50 lux." The temperature reading is accurate to ±0.5°C, adding another dimension for climate automations.

Why it beats Zigbee/Z-Wave sensors: Unlike Zigbee and Z-Wave motion sensors that require a hub/coordinator and can add 500ms–1s of latency through mesh routing, the Shelly Motion 2 connects directly to your router. The direct Wi-Fi connection, combined with local HTTP/MQTT commands to other Shelly devices, means the light comes on before you've taken your second step into a dark room.

Key Features: - Wi-Fi 802.11 b/g/n with ultra-low-power standby mode - 9m detection range, 100° horizontal / 60° vertical field of view - Response time under 200ms - Built-in lux sensor (0–65,535 lux range) - Built-in temperature sensor (±0.5°C accuracy) - Up to 2-year battery life on 2× CR123A batteries - Tamper detection and vibration alert - Wall-mount and corner-mount brackets included - MQTT, REST API, CoAP, Home Assistant auto-discovery

Best for: Lighting automations that need instant response — hallways, bathrooms, staircases, pantries, and closets.

5. Shelly Door/Window 2 — Compact Wi-Fi Contact Sensor

The Shelly Door/Window 2 is the company's refined second-generation reed-switch sensor that detects when a door, window, cabinet, or gate is opened or closed. While door sensors are the most basic smart home accessory, Shelly's version stands out with best-in-class Wi-Fi performance, a 2-year battery life on a single CR2032 coin cell, and unique extra features competitors lack.

The Door/Window 2 uses a neodymium magnet and a high-sensitivity reed switch, allowing a generous gap tolerance of up to 15mm between the magnet and the sensor body. This means it works reliably on uneven surfaces, thick door frames, sliding doors, and windows where perfect alignment isn't always possible. The sensor reports state changes in under 300ms.

What makes it special is the built-in lux sensor and the three dry-contact terminals. The lux sensor enables automations like "if the front door opens and it's dark outside, turn on the entryway light." The dry-contact terminals let you wire an external reed switch, a wired pressure mat for chair/bed occupancy monitoring, or a float switch for water level detection — essentially turning the sensor into a universal state-change monitor. The device also tracks open/close event counts, giving you data on how often a door or window is used.

Why choose Wi-Fi over Zigbee/Z-Wave: Direct Wi-Fi connection means no hub dependency and no mesh routing delays. The sensor can send HTTP commands directly to Shelly relays to trigger lights without any controller in between — a true peer-to-peer smart home.

Key Features: - Wi-Fi 802.11 b/g/n with quick state-change transmission - Up to 15mm magnet gap tolerance with neodymium magnet - Up to 2-year battery life on 1× CR2032 coin cell - Built-in lux sensor for ambient light awareness - 3 dry-contact terminals for external wired sensors - Open/close event counter with timestamps - Tamper detection and low-battery alerts - MQTT, REST API, CoAP, Home Assistant auto-discovery - Ultra-compact design (34 × 34 × 13mm)

Best for: Door and window security monitoring, cabinet lighting triggers, and creative wired-sensor projects that need Wi-Fi connectivity.

6. Shelly Flood — Wi-Fi Water Leak Detector

Water damage is one of the most expensive and heartbreaking home disasters — and the Shelly Flood is your first line of defense. This compact, battery-powered sensor detects water leaks the moment they occur and can trigger instant alerts, shut off a connected water valve (via a Shelly relay), or flash smart lights red to get your attention.

The Flood features gold-plated sensing probes on its underside that detect even a thin film of water (0.5mm depth). When water bridges the probes, the device wakes from its low-power sleep, connects to Wi-Fi, and fires off alerts through the Shelly Cloud, MQTT, or local HTTP requests. The entire process — from water contact to phone notification — takes under 2 seconds. The device also includes a 1.5m remote sensing cable with probe, so you can place the main unit on a shelf and run the cable to the floor or into a drip pan.

A pair of AAA batteries powers the Flood for up to 18 months, and it sends periodic heartbeat signals so your smart home platform knows it's still alive. The built-in temperature sensor tracks ambient temperature, which can be useful for detecting frozen pipe conditions before they burst. The 80dB audible alarm ensures you hear about a leak even if your phone is on silent.

Why it's essential: Leaks often happen when you're away from home or asleep. A Shelly Flood under every sink, behind every toilet, next to the water heater, and under the washing machine costs less than the insurance deductible on most water-damage claims — and it can prevent the damage entirely.

Key Features: - Wi-Fi connectivity with ultra-low-power sleep mode - Gold-plated water-sensing probes (detects from 0.5mm water depth) - 1.5m remote sensing probe cable included - 80dB audible alarm + smartphone notifications - Built-in temperature sensor (±0.5°C) - Up to 18-month battery life on 2× AAA batteries - Periodic heartbeat signals for alive/dead monitoring - Local and cloud alerting via MQTT, REST, Shelly Cloud - IP65 splash-resistant enclosure

Best for: Early water leak detection under sinks, near water heaters, behind washing machines, and in basement utility rooms.

7. Shelly TRV — Smart Radiator Thermostat Valve

Heating (and cooling) accounts for roughly half of a typical home's energy bill, and the Shelly TRV is one of the smartest investments you can make to reduce that cost. This motorized thermostatic radiator valve replaces the manual TRV head on your existing radiators and gives you per-room temperature control, time-based scheduling, geolocation-based heating, and open-window detection.

The TRV uses a precision stepper motor to adjust the radiator valve with 0.5°C granularity. The built-in temperature sensor is accurate to ±0.3°C, and an external temperature sensor port lets you use a remote probe for more accurate room readings (since the radiator itself can influence readings at the valve). The e-ink-like display shows the current target temperature and battery status without being backlit and distracting at night.

Scheduling is where the TRV shines. You can create different temperature profiles for every day of the week — toasty 21°C in the morning and evening, eco 17°C during the workday, and a cool 15°C overnight. The geofencing feature (using your phone's location) can automatically lower temperatures when the last person leaves home and warm things up when the first person heads back. Multiple TRVs work together to create a zoned heating system: bedrooms cool during the day, living areas warm in the evening, all from a single boiler.

Why choose Shelly over proprietary systems: Unlike closed radiator systems (Tado, Netatmo, Honeywell Evohome), the Shelly TRV integrates directly with Home Assistant, MQTT, and your other Shelly devices. You can have a Shelly Door/Window sensor automatically trigger "open window" mode on the TRV — pausing heating in that room to avoid heating the neighborhood. The local API means no subscription fees for scheduling and geofencing.

Key Features: - Precision stepper motor with 0.5°C temperature granularity - ±0.3°C temperature accuracy with external probe port - Per-day scheduling with multiple temperature zones per day - Geofencing-based auto-away and pre-heating - Open-window detection (rapid temperature drop sensing) - Child lock and valve anti-seize routine - E-ink display for quiet, low-power status reading - Works with M30 × 1.5mm radiator valves (adapters included for Danfoss RA, RAV, and RAVL) - MQTT, REST API, Home Assistant, Alexa, Google Home - 2× AA batteries with up to 18-month life

Best for: Converting a dumb central heating system into a room-by-room zoned smart heating system without replacing the boiler or piping.

8. Shelly Plus Plug S — Smart Wi-Fi Plug with Power Monitoring

The Shelly Plus Plug S is the simplest entry point into the Shelly ecosystem. Plug it into any wall outlet, plug an appliance into it, and you instantly gain remote on/off control, scheduling, timers, and precise energy monitoring for that device. No wiring, no tools, no electrician — just plug and play.

Despite its simplicity, the Plus Plug S is packed with the same Plus-generation features as the in-wall relays: the ESP32 processor, Bluetooth setup, local scripting, and precise power monitoring that measures voltage, current, power factor, and total energy consumption. The compact design (European Schuko Type F) doesn't block adjacent outlets, and a side-mounted physical button lets you manually toggle the plug without your phone.

The plug's 16A rating (3,680W at 230V) means it can handle high-power appliances like space heaters, dehumidifiers, electric kettles, and air conditioners — while simultaneously logging exactly how much energy they consume. The local scripting engine enables edge automations like "automatically turn off after 3 hours" or "cycle on for 15 minutes every 2 hours during freezing weather" (for pipe-heating cables) — all running on the plug itself without any external controller.

Why it's the best smart plug for energy management: Most smart plugs give you simple on/off and maybe a rough power reading. The Plus Plug S provides lab-grade energy monitoring with per-minute, hourly, daily, and monthly charts. You'll discover which appliances are energy vampires, exactly how much that old refrigerator costs per month, and whether your "energy-efficient" space heater is actually efficient.

Key Features: - Wi-Fi + Bluetooth smart plug (Schuko Type F, also available in Type G for UK) - Precise power monitoring: V, A, W, VA, power factor, total kWh - 16A max load (3,680W at 230V) - Local scripting engine for edge automations - Physical toggle button on the plug body - Compact design that doesn't block adjacent outlets - Scheduling, timers, and sunrise/sunset automations - MQTT, REST API, WebSocket, Matter-ready - Over-temperature and overload protection

Best for: Instant energy monitoring for any plugged appliance — the easiest way to start measuring and managing home energy use.

9. Shelly Dimmer 2 — Wi-Fi Smart Dimmer Module

The Shelly Dimmer 2 turns any dimmable light into a smart dimmable light without replacing the wall switch or the bulb. This tiny module (33 × 33 × 15mm) wires in behind an existing push-button or momentary switch and gives you smooth 0–100% dimming control, soft on/off transitions, and preset brightness levels — all controllable via the Shelly app, voice assistants, or automations.

The Dimmer 2 supports both leading-edge and trailing-edge dimming, making it compatible with a wide range of loads: incandescent, halogen (with and without transformers), dimmable LEDs, and dimmable CFLs. It can handle loads from 1W to 200W without a heatsink, and up to 350W with adequate ventilation. The auto-calibration feature detects the connected load type and adjusts the dimming curve for flicker-free performance from 1% to 100%.

The built-in power monitoring tracks energy consumption, and the device reports real-time brightness levels to your smart home platform — useful for creating automations like "at 10 PM, dim the living room lights to 30% over 15 minutes" or "when the TV turns on, dim the lights to 20%." The soft on/off feature brings lights up and down gently, protecting bulbs from thermal shock and extending their lifespan.

Why it beats smart bulbs: Instead of replacing every bulb with an expensive smart bulb (and dealing with the pain of someone turning off the physical switch), the Dimmer 2 makes the circuit smart. Your existing bulbs, existing switches, and existing aesthetic all stay exactly the same — you just gain dimming and automation. This is vastly more cost-effective for rooms with multiple bulbs on a single circuit, like a kitchen with 6–8 recessed lights.

Key Features: - Leading-edge and trailing-edge dimming (auto-detect) - 1W–200W load (350W with ventilation), 230V AC - 0–100% smooth dimming with flicker-free auto-calibration - Soft on/off transitions with configurable speed - Power and energy monitoring - Compatible with momentary/push-button switches - Local scripting, MQTT, REST API, WebSocket - Matter-ready with OTA firmware updates - Trailing-edge mode reduces EMI/noise on sensitive LED circuits

Best for: Making entire lighting circuits dimmable without changing bulbs — the most cost-effective smart lighting upgrade for multi-bulb rooms.

10. Shelly Plus H&T — Wi-Fi Temperature and Humidity Sensor

The Shelly Plus H&T is the environmental sentinel of your smart home. This compact, battery-powered sensor monitors temperature (±0.3°C accuracy) and humidity (±3% RH accuracy) and reports data to your smart home platform at configurable intervals. It's the device that enables climate-aware automations: triggering a dehumidifier when basement humidity exceeds 65%, turning on a fan when the bathroom gets steamy, or alerting you when the baby's room gets too cold.

The Plus H&T uses the same Plus-generation internals — the ESP32 chip, Bluetooth for quick setup, an improved antenna, and an e-ink display that shows current readings, battery status, and Wi-Fi signal strength. The screen updates silently (no backlight hum) and is easily readable across a room. A CR2450 coin cell powers the device for up to 2 years with a 10-minute reporting interval.

What sets it apart from other temperature sensors is the configurability. You can set reporting intervals as fast as every 30 seconds for critical applications (like a server room or wine cellar) or as slow as every 60 minutes for low-priority locations. You can define threshold alerts that trigger notifications when temperature or humidity crosses a boundary, and the local scripting engine can execute actions directly — like sending an HTTP command to a Shelly relay controlling a space heater. The device stores 7 days of historical data onboard, viewable in the web interface even without an internet connection.

Why it completes the Shelly ecosystem: Climate data is the missing piece that makes automations truly intelligent. A Shelly Motion detects presence, a Shelly H&T reports the temperature, and together they decide whether to turn on the ceiling fan — all locally, in under 300ms, with no cloud dependency.

Key Features: - Wi-Fi + Bluetooth temperature and humidity sensor - ±0.3°C temperature accuracy, ±3% RH humidity accuracy - E-ink display showing readings, battery, and Wi-Fi signal - Up to 2-year battery life on 1× CR2450 coin cell (at 10-min intervals) - Configurable reporting interval (30s to 60min) - 7-day onboard historical data storage - Threshold alerts for temperature and humidity - Local scripting for edge-triggered climate automations - MQTT, REST API, CoAP, Home Assistant auto-discovery

Best for: Whole-home climate monitoring and humidity-triggered automations — the environmental intelligence layer of a smart home.

How to Build Your Shelly Smart Home System

Start with Energy Monitoring: Deploy a few Shelly Plus 1PM or Plus Plug S devices on your highest-consumption appliances — the refrigerator, HVAC circulating pump, entertainment center, and home office. Spend a month gathering data before making any control automations. You'll likely discover surprises: that old freezer in the garage is costing $30/month, or the "sleeping" home theater system draws 80W 24/7. Knowledge is power, literally.

Layer in Lighting Control: Once you have energy visibility, add Shelly Dimmer 2 modules to your most-used lighting circuits. Focus on rooms with multiple bulbs on a single switch — kitchens, living rooms, and dining rooms — where the per-bulb cost savings of Shelly vs. smart bulbs is greatest. Pair them with Shelly Motion 2 sensors for presence-based lighting that feels like magic: lights fade on as you enter and fade off minutes after you leave.

Add Climate Intelligence: Place Shelly Plus H&T sensors in each major room and Shelly TRVs on your radiators. The combination lets you heat only occupied rooms to comfortable temperatures while keeping unused rooms at a maintenance baseline. Add Shelly Door/Window 2 sensors to pause heating when windows are open. A typical UK/EU household can save 20–30% on heating costs with this zone-based approach.

Protect Against Disasters: Deploy Shelly Flood sensors at every water risk point. Wire a Shelly Plus 1PM to a motorized water shut-off valve on your main supply line, and create an automation: any Flood sensor triggers the valve to close within 3 seconds, then sends an urgent push notification. The peace of mind alone is worth the investment.

Centralize with Home Assistant (Optional but Recommended): While the Shelly app handles basic control and scheduling, pairing your Shelly devices with Home Assistant (running on a Raspberry Pi, old laptop, or NAS) unlocks the full potential. Home Assistant's auto-discovery detects every Shelly device on your network instantly, and its visual automation editor lets you create complex, multi-device, multi-condition automations without writing code. Plus, Home Assistant's Energy dashboard ingests Shelly's per-circuit power data to show you a complete picture of your home's energy flow — solar production, battery storage, grid import/export, and per-appliance consumption — all from Shelly's onboard monitoring.

Shelly FAQ: What Smart Home Buyers Need to Know

Do I need a hub for Shelly devices? No. Every Shelly device connects directly to your existing Wi-Fi network. No proprietary hub, bridge, or coordinator is required. However, if you have a very large home (50+ Shelly devices) or a Wi-Fi router with limited capacity, consider upgrading to a mesh Wi-Fi system or a dedicated IoT SSID. Shelly Pro devices with Ethernet are recommended for large, reliability-critical installations.

Can Shelly devices work without internet? Yes — this is one of Shelly's defining features. All Shelly devices operate fully on your local network. The Shelly app can connect to devices directly via their local IP addresses, and MQTT/HTTP/WebSocket communication stays within your LAN. Cloud features (remote access when away from home, Alexa/Google Home voice control) require internet, but local automations continue working perfectly during an outage.

Are Shelly devices safe for DIY installation? Shelly relays involve wiring into mains electricity. If you're comfortable replacing a light switch or outlet, you can install a Shelly relay. However, if you're unsure, hire a qualified electrician — the cost of an hour of professional labor is far less than the cost of a fire or shock. Shelly provides detailed wiring diagrams for every device and configuration. Always isolate the circuit at the breaker before working, and use a voltage tester to verify the circuit is dead.

Which Shelly devices support Matter? Shelly's Plus and Pro generation devices (Plus 1PM, Plus 2PM, Plus Plug S, Plus H&T, Pro 4PM, and all future Plus/Pro releases) support Matter-over-Wi-Fi via OTA firmware update. First-generation (non-Plus) devices will not receive Matter support. Check the product page for the "Matter-ready" badge.

How many Shelly devices can my Wi-Fi handle? A quality modern router or mesh system typically handles 50–100 Wi-Fi clients without issue. Shelly devices are low-bandwidth (kilobytes per communication, not megabytes), so they don't strain your network. The limiting factor is usually the router's DHCP client table and connection tracking — if you're deploying 50+ Shelly devices, invest in a router designed for IoT density (Ubiquiti UniFi, TP-Link Omada, or similar).

What's the difference between Shelly Plus and Shelly Pro lines? Plus devices are designed for retrofit installation behind existing switches and outlets. Pro devices are DIN-rail-mountable for electrical panel installation, add Ethernet connectivity, and include enhanced thermal management for continuous high-load operation. Functionally, they share the same scripting engine, protocols, and Matter support. Choose Plus for behind-switch installs and Pro for panel-mounted, multi-circuit control.

Can I flash custom firmware on Shelly devices? Yes. Shelly actively supports and documents the open-source community. ESPHome and Tasmota custom firmware can be flashed on most Shelly devices, and Shelly provides OTA flashing tools and factory reset procedures. However, Shelly's stock firmware has become so capable (with local scripting, MQTT, and Matter) that many users find no need for custom firmware in 2026.

Conclusion

Shelly has carved out a unique position in the smart home market: professional-grade hardware at consumer-friendly prices, with a genuine commitment to local control, open protocols, and hackability that the open-source community loves. In 2026, the Shelly ecosystem is more complete, more polished, and more interoperable than ever.

The Shelly Plus 1PM and Shelly Pro 4PM are the backbone devices that every smart home should be built on — providing circuit-level control and energy monitoring that most homes completely lack. The Shelly Motion 2 and Shelly Door/Window 2 add the presence and state awareness that makes automations feel intelligent rather than gimmicky. And environmental devices like the Shelly TRV, Shelly Plus H&T, and Shelly Flood bring climate comfort, energy savings, and disaster protection into a unified, locally controlled system.

What makes Shelly truly special is that it grows with you. Start with a single Plus Plug S to monitor your home-office energy consumption. Add a Dimmer 2 to make your living room lights smart. Weather-seal a Motion 2 outdoors to trigger driveway floodlights. Before you know it, you have 30 devices working together — and not one of them requires a cloud server to function. That's the promise of real smart home automation, and in 2026, Shelly delivers it better than anyone.