Relay
A relay is a wired switching module that fits behind an existing switch or fixture and turns a circuit on or off on command. It adds smart control to lights and appliances without changing the wall switch.
A relay module wires in behind a wall switch, light fixture, or appliance and switches the load electrically. Because it hides inside the back box, the existing switch keeps working while Home Assistant gains independent control of the circuit. Many relays also meter power, so the same module reports how much the connected load draws.
How Selora AI uses relays
- Retrofit smart switching for lights, fans, and appliances without replacing the wall plate or running new wires.
- Energy monitoring on metering models, useful for tracking circuits and spotting always-on loads.
- Safety and schedule recipes that cut power to a circuit when the home is set to away or on a timer.
Why relays matter for installers
A relay turns existing wiring into a controllable circuit, which is usually cheaper and less disruptive than swapping fixtures or switches. Local control means the load keeps responding to its physical switch even when the network or internet is down.
Compatible devices
1 Gen3
Shelly 1 Gen3 is a Wi-Fi relay module with a dry, potential-free contact that wires behind an existing switch to add smart on/off control to almost any light or appliance.
1 Gen4
Compact multiprotocol relay switch with a potential-free (dry contact) output for switching lights, appliances, and low-voltage circuits. No neutral required and supports Wi-Fi, Bluetooth, Zigbee, and Matter for flexible integration.
1 Mini Gen3
Ultra-compact Wi-Fi relay that fits inside a wall box to switch lights or appliances via a potential-free dry contact, rated up to 8 A. Ideal for retrofitting existing switches without rewiring.
1 Mini Gen4
A compact Gen4 relay module with a potential-free (dry) contact output for switching lights, appliances, or low-voltage circuits in tight spaces. Multiprotocol radios let it run on Wi-Fi, Bluetooth, Zigbee, or Matter to fit almost any installer's ecosystem.
1PM Gen3
Shelly 1PM Gen3 is a Wi-Fi relay module with built-in power metering that wires behind an existing switch, adding smart control and energy monitoring to a single circuit.
1PM Gen4
Shelly 1PM Gen4 is a multiprotocol relay with power metering that wires behind a switch and speaks Wi-Fi, Bluetooth, Zigbee, and Matter, so it fits almost any smart home ecosystem.
1PM Mini Gen3
Shelly 1PM Mini Gen3 is an ultra-compact Wi-Fi relay with power metering, small enough to fit inside a back box behind a fixture or switch for discreet smart control of one circuit.
1PM Mini Gen4
A compact single-channel smart relay with built-in power metering that fits inside a standard wall box. Supports Wi-Fi, Bluetooth, Zigbee, and Matter for flexible integration into any smart home.
2PM Gen3
Shelly 2PM Gen3 is a dual-channel Wi-Fi relay with power metering that controls two independent circuits or drives a single roller shutter or motorized cover with position feedback.
2PM Gen4
Dual-channel Wi-Fi relay with per-channel power metering and a roller/cover mode for motorized blinds and shutters. Multiprotocol Gen4 hardware adds Bluetooth, Zigbee, and Matter for flexible integration.
Plus 1
A compact Gen2 Wi-Fi relay with a dry (potential-free) contact for switching lights, appliances, gates, and low-voltage circuits. Works with or without a neutral and needs no power-metering hardware, making it a flexible drop-in for almost any switching job.
Plus 1PM
Wi-Fi relay switch with built-in power metering, rated for up to 16A across 110-240V AC or 24-30V DC loads. Adds accurate energy monitoring to any light, appliance, or circuit for local, app-free control.
Plus 2PM
Dual-channel Wi-Fi relay with per-channel power metering for two independent loads or a single roller shutter. Obstacle detection and a safety switch make cover control reliable for blinds, awnings, and garage doors.
Plus Uni
A compact universal Wi-Fi module with two potential-free relay outputs, digital and analog inputs, a pulse counter, and a 1-Wire bus for DS18B20 or DHT22 sensors. Ideal for integrating low-voltage devices and existing sensors into a smart system.
Pro 1
DIN-rail mountable Gen2 smart relay with a single potential-free (dry) contact channel rated to 16A. Wired LAN plus Wi-Fi connectivity gives professional installs reliable, redundant control for lights and appliances.
Pro 1PM
Shelly Pro 1PM is a DIN-rail mounted relay with power metering and wired Ethernet, built for breaker panels and professional installs that need a single switched and monitored circuit.
Pro 2
Shelly Pro 2 is a DIN-rail mounted 2-channel relay with potential-free (dry) contacts and wired Ethernet, built for breaker panels and professional installs controlling two independent loads.
Pro 2PM
Shelly Pro 2PM is a DIN-rail dual-channel relay with per-channel power metering that controls two circuits or drives a single roller shutter, with Wi-Fi, Ethernet, and Bluetooth for reliable panel connectivity.
Pro 3
DIN-rail Wi-Fi, Bluetooth, and Ethernet smart relay with three independent 16 A channels for professional installations. Wired LAN delivers rock-solid local control in panel and cabinet deployments.
Pro 4PM
DIN-rail 4-channel smart relay with per-channel power and energy metering, a color LCD display, and wired Ethernet plus Wi-Fi for rock-solid professional installs. Each output is independently controlled and monitored for precise load management.
Qubino Wave 1
Single-channel Z-Wave relay switch with a potential-free (dry) contact rated up to 16 A. Mains-powered units repeat the Z-Wave mesh to extend range across your network.
Qubino Wave 1 Mini
Shelly Qubino Wave 1 Mini is a tiny Z-Wave relay that fits behind an existing switch to add smart on/off control to a light or appliance on a Z-Wave network.
Qubino Wave 1PM
A compact Z-Wave relay module with integrated power metering for a single 16A circuit. As a mains-powered device it repeats the Z-Wave mesh, extending range and reliability for the rest of your network.
Qubino Wave 1PM Mini
Ultra-compact Z-Wave relay module that switches a single load up to 8 A and meters power, voltage, current, and energy. As a mains-powered Z-Wave device it also repeats the mesh for stronger network coverage.
Qubino Wave 2PM
A dual-channel Z-Wave 800 in-wall relay with independent per-channel power and energy metering, ideal for controlling two lighting or appliance loads from one module. As a mains-powered Z-Wave device it repeats the mesh, extending range for other nodes.
Qubino Wave Pro 2PM
DIN-rail 2-channel Z-Wave 800 relay with per-channel power and energy metering, controlling two independent loads up to 16 A each (25 A total). Mains-powered for breaker-box installs, it repeats the Z-Wave mesh to extend range and reliability.
Wall Display XL
A 10.1-inch Wi-Fi 6 touch control panel for Home Assistant and Shelly devices, with a built-in relay, motion sensor, and light sensor. Gives installers an in-wall hub to control scenes, climate, and connected devices from one premium display.
Wave Pro 1
A professional DIN-rail Z-Wave smart switch with a single potential-free (dry contact) relay rated to 16 A. Mains-powered, it repeats the Z-Wave mesh and switches lights or appliances inside the breaker box.
Wave Pro 1PM
A Z-Wave 800, single-channel DIN-rail relay rated up to 16 A with integrated power metering for monitoring connected lights or appliances. Installs in the breaker panel and, when mains-powered, repeats the Z-Wave mesh to extend range.
Wave Pro 2
Professional 2-channel DIN-rail Z-Wave smart switch with potential-free (dry) contact outputs rated up to 16 A per channel. Installs in the breaker box to control lights and appliances, and repeats the Z-Wave mesh to extend coverage.
Wave Pro 3
Z-Wave 3-channel DIN-rail relay with potential-free dry contacts rated 16 A per channel for controlling lights and appliances in the breaker box. Supports Z-Wave Long Range and, as a mains-powered device, repeats the Z-Wave mesh.
X MOD1
Compact OEM embedded wireless module (ESP-Shelly SoC) that adds 2.4 GHz Wi-Fi and Bluetooth 5 to appliances and IoT products. Exposes up to 8 configurable inputs/outputs and Shelly scripting so manufacturers can build connected, hub-free devices.