Shelly 1 Gen4 ANZ: Everything You Need to Know Before Installing
The Shelly 1 Gen4 ANZ is one of the most flexible smart relay modules in the Shelly range. It is designed for smart control of lights, appliances, garage doors, gates, towel rails, fans, contactors, and other compatible electrical loads.
Unlike many standard smart switches, the Shelly 1 Gen4 ANZ features potential-free / dry contacts, making it suitable for applications where you need the relay output to be electrically isolated from the device power supply.
Whether you are building a simple smart lighting setup or integrating with a larger Home Assistant, Matter, Zigbee, or Shelly ecosystem, the Shelly 1 Gen4 ANZ is a compact and versatile option for Australian and New Zealand installations.
What Is the Shelly 1 Gen4 ANZ?
The Shelly 1 Gen4 ANZ is a compact smart relay switch that can be installed behind compatible wall switches, power points, or inside suitable electrical enclosures.
It allows you to control connected devices from your phone, tablet, computer, voice assistant, or smart home platform.
It can work:
- As a standalone smart relay on Wi-Fi
- Through the Shelly Smart Control app
- With supported smart home platforms
- With Matter
- With Zigbee
- With local automation systems such as Home Assistant
- Through MQTT, webhooks, schedules, and scripting
This makes it ideal for users who want both simple smart control and more advanced automation options.
Key Features
1. Dry Contact / Potential-Free Relay
One of the biggest advantages of the Shelly 1 Gen4 ANZ is its dry contact relay output.
This means the relay output does not automatically pass through the same voltage used to power the Shelly device. The input and output relay terminals are electrically isolated, which makes the device suitable for many different control applications.
Common examples include:
- Garage door control
- Gate automation
- Boiler or heating control
- Towel rail switching
- Lighting circuits
- Fan or ventilation control
- Contactor control
- Low-voltage control applications, depending on wiring design
This is one of the main reasons customers choose the Shelly 1 Gen4 instead of a standard smart switch.
2. Multi-Protocol Support
The Shelly 1 Gen4 ANZ supports multiple connectivity options, giving users flexibility depending on their smart home setup.
Supported connectivity includes:
- Wi-Fi
- Bluetooth
- Zigbee
- Matter
For many customers, this is one of the most important upgrades in the Gen4 range. You are not locked into only one ecosystem, and the device can suit different types of installations.
For example:
- Use Wi-Fi for direct Shelly app or local network control
- Use Matter for supported Matter ecosystems
- Use Zigbee for compatible Zigbee smart home systems
- Use Bluetooth for setup and Shelly BLU ecosystem support
3. Matter Compatible
Matter compatibility makes the Shelly 1 Gen4 ANZ a future-friendly choice for smart home installations.
Matter is designed to improve compatibility between different smart home ecosystems. This can be useful for users who want broader support across platforms such as Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, and other Matter-supported systems.
Please note that actual features may vary depending on the platform being used.
4. Zigbee Support and Zigbee Range Extender Function
The Shelly 1 Gen4 ANZ can also operate with Zigbee and can function as a Zigbee repeater.
This can help improve Zigbee network coverage when the device is correctly added to a compatible Zigbee network.
For customers building a Home Assistant setup, this can be useful if they are already using Zigbee devices such as sensors, buttons, or other relays.
5. Wi-Fi Range Extender for IoT Devices
The Shelly 1 Gen4 ANZ also supports Wi-Fi range extender functionality for IoT devices.
This feature may help expand connectivity for nearby Shelly or smart home devices, depending on the network environment and setup.
6. Bluetooth Gateway for Shelly BLU Devices
The device can also act as a Bluetooth gateway for Shelly BLU devices.
This means it can help receive Bluetooth signals from compatible Shelly BLU sensors and pass those signals into the wider Shelly ecosystem.
This is helpful for automations using devices such as:
- Shelly BLU Door/Window
- Shelly BLU Motion
- Shelly BLU Button
- Shelly BLU H&T
7. Local and Cloud Control
Shelly devices are popular because they can be used with both local and cloud-based control options.
The Shelly 1 Gen4 ANZ can be controlled through:
- Shelly Smart Control app
- Embedded web interface
- Local Wi-Fi network
- Shelly Cloud
- Home automation systems
- MQTT
- HTTP actions / webhooks
- Schedules and scripts
For advanced users, this means the device is not limited to basic app control.
Common Use Cases
Smart Light Control
The Shelly 1 Gen4 ANZ can be used to control compatible lighting circuits while keeping a physical wall switch in place.
Common lighting automations include:
- Turning lights on and off remotely
- Scheduling porch or outdoor lights
- Automating lights based on time of day
- Triggering lights using motion sensors
- Creating scenes with other Shelly devices
Garage Door or Gate Control
Because the Shelly 1 Gen4 ANZ has dry contacts, it is commonly used for garage door and gate control where the motor controller requires a simple contact closure.
This is one of the most popular applications for Shelly 1-style relays.
A common setup may include:
- Shelly 1 Gen4 ANZ for open/close trigger
- A compatible sensor to detect door position
- Home Assistant, Shelly app, or another smart home platform for control
Important: Always confirm the garage or gate controller input requirements before installation.
Heating, Towel Rail, or Appliance Control
The device can be used to control compatible heating appliances, towel rails, or other resistive loads, as long as the electrical load is within the rated limits and the installation is completed correctly.
For heating applications, it can be paired with a temperature sensor and automation platform to create scheduled or temperature-based control.
If you require power monitoring or energy usage tracking, consider a Shelly model with power metering, such as a Shelly 1PM-series device, instead of the Shelly 1 Gen4.
Fan and Ventilation Control
The Shelly 1 Gen4 ANZ can be used for bathroom fans, kitchen ventilation, or other compatible fan loads.
Possible automations include:
- Fan on after shower humidity rises
- Fan off after a delay
- Scheduled ventilation
- Motion-based fan control
- Manual override with a wall switch
For inductive loads such as fans or motors, additional protection such as an RC snubber may be required depending on the installation.
Contactor Control
For larger loads, the Shelly 1 Gen4 ANZ may be used to control a contactor rather than switching the main load directly.
This is useful where the load exceeds the relay’s direct switching capability or where the electrical design requires a contactor.
Always consult a licensed electrician for the correct design.
Important Specifications
Here are the key specifications customers usually ask about:
- Product: Shelly 1 Gen4 ANZ
- Type: Smart relay switch
- Relay type: Dry contact / potential-free
- Power supply: 110–240V AC
- Maximum switching voltage: 240V AC
- Maximum switching current: 16A at 240V AC
- Power consumption: Less than 1W
- Connectivity: Wi-Fi, Bluetooth, Zigbee, Matter
- Zigbee repeater: Yes
- Internal temperature sensor: Yes
- Overheating protection: Yes
- Scripting: Yes
- MQTT: Yes
- Schedules: Supported
- Webhooks: Supported
- Dimensions: 37 x 42 x 16 mm
- Neutral required: Yes
Does the Shelly 1 Gen4 ANZ Need a Neutral Wire?
Yes. The Shelly 1 Gen4 ANZ requires both active and neutral power supply connections.
If you do not have a neutral wire available at the switch location, speak with a licensed electrician to confirm installation options.
Does the Shelly 1 Gen4 ANZ measure power?
No, the Shelly 1 Gen4 ANZ is designed as a smart relay with dry contacts. It is not primarily a power-monitoring relay.
If you need power monitoring or energy usage data, you should consider a Shelly 1PM model instead.
A simple way to choose:
- Choose Shelly 1 Gen4 ANZ if you need dry contact control
- Choose Shelly 1PM Gen4 if you need power monitoring
- Choose Shelly Plus/Pro energy monitoring devices for more advanced energy tracking
Shelly 1 Gen4 ANZ vs Shelly 1PM Gen4 ANZ
Customers often compare the Shelly 1 Gen4 ANZ and Shelly 1PM Gen4 because both are compact relay modules.
The main difference is:
Shelly 1 Gen4 ANZ
- Dry contact relay
- Best for garage doors, gates, contactors, low-voltage control, and isolated switching
- Does not provide power monitoring
Shelly 1PM Gen4
- Relay with power monitoring
- Best for lights and appliances where you want to measure energy use
- Not the same as a dry contact relay
If your project requires a volt-free contact, the Shelly 1 Gen4 ANZ is usually the better choice. If your project requires energy monitoring, the Shelly 1PM Gen4 is usually the better choice.
Installation Notes
The Shelly 1 Gen4 ANZ is a mains-powered electrical device and should be installed by a licensed electrician in accordance with local electrical regulations.
Before installation, confirm:
- The load type
- The current draw
- Whether the load is resistive, capacitive, or inductive
- Whether an RC snubber is required
- Whether the device will be installed in a suitable enclosure
- Whether there is sufficient space and ventilation
- Whether a neutral wire is available
- Whether the selected wiring design matches the intended use
For inductive loads such as fans, motors, transformers, refrigerators, air-conditioners, and similar devices, additional protection may be required.
Setup and Pairing
The Shelly 1 Gen4 ANZ can be configured through different methods depending on your chosen ecosystem.
Common setup options include:
- Shelly Smart Control app
- Device web interface
- Matter pairing
- Zigbee pairing
- Home Assistant
- MQTT
- Local network configuration
The physical button on the device can be used for setup and reset functions.
Common button actions include:
- Hold for 5 seconds to enable access point and Bluetooth connection
- Hold for 10 seconds to factory reset
- Press 5 times to switch from Matter profile to Zigbee profile
- Press 3 times to restart inclusion mode if the pairing window is missed
Best Applications for Shelly 1 Gen4 ANZ
The Shelly 1 Gen4 ANZ is best suited for:
- Garage door automation
- Gate control
- Dry contact switching
- Lighting control
- Towel rail control
- Fan and ventilation control
- Contactor control
- Boiler or heating control
- Smart home retrofit projects
- Home Assistant installations
- Matter-compatible smart homes
- Zigbee smart home systems
- Shelly BLU sensor automations
When Not to Use Shelly 1 Gen4 ANZ
The Shelly 1 Gen4 ANZ may not be the best option if:
- You need energy monitoring
- You need detailed power consumption reports
- There is no neutral wire available
- The load exceeds the rated switching capacity
- You are controlling an incompatible motor or inductive load without suitable protection
- You need a dimmer rather than an on/off relay
- You need multi-channel switching in one device
In these cases, another Shelly model may be more suitable.
Frequently Asked Questions
Is Shelly 1 Gen4 ANZ suitable for Australia and New Zealand?
Yes, the ANZ version is designed for the Australian and New Zealand market. Always ensure installation is completed by a licensed electrician and complies with local electrical requirements.
Can I install Shelly 1 Gen4 ANZ myself?
If the installation involves mains voltage wiring, it must be completed by a licensed electrician. Smart relay modules are not plug-and-play devices and incorrect wiring can be dangerous.
Does it work with Home Assistant?
Yes, Shelly devices are commonly used with Home Assistant. Depending on your setup, you may be able to integrate it through Shelly integration, Matter, MQTT, or Zigbee.
Does it work with Apple Home?
The Shelly 1 Gen4 ANZ supports Matter, which may allow integration with Apple Home depending on your setup and Matter controller. Feature support may vary by platform.
Does it work with Google Home and Alexa?
Yes, Shelly devices can be integrated with popular smart home platforms such as Google and Alexa. Available features may depend on the chosen integration method.
Can it be used for a garage door?
Yes, this is one of the most common use cases because the Shelly 1 Gen4 ANZ has dry contacts. It can act as a smart trigger for many garage door controllers. Always confirm compatibility with your garage motor before installation.
Can it control a gate?
Yes, it may be suitable for gate control where the gate controller supports a dry contact input. Check the gate controller manual before installation.
Can it control a heater or towel rail?
Yes, it can control compatible resistive loads within the rated limits. However, always check the current draw and installation requirements. For energy monitoring, consider a Shelly 1PM model instead.
Can it control lights?
Yes, it can be used for compatible lighting circuits. If you require dimming, you will need a suitable Shelly dimmer product instead.
Does it support power monitoring?
No. If you need power monitoring, choose a Shelly 1PM-series product instead.
Does it need neutral?
Yes, the Shelly 1 Gen4 ANZ requires a neutral connection.
Is it Zigbee?
Yes, the Shelly 1 Gen4 ANZ supports Zigbee and can also act as a Zigbee repeater.
Is it Matter compatible?
Yes, the Shelly 1 Gen4 ANZ is Matter-compatible.
Can it be used without the Shelly Cloud?
Yes. Shelly devices can support local control options depending on how they are configured. Advanced users often use Shelly devices with Home Assistant, MQTT, HTTP actions, or local web interface control.
What is the difference between the Shelly 1 Gen4 ANZ and the Shelly 1PM Gen4 ANZ?
The Shelly 1 Gen4 ANZ has dry contacts and is best for isolated switching applications such as garage doors, gates, and contactor control.
The Shelly 1PM Gen4 includes power monitoring and is better when you need to measure energy consumption.
Can it work as a Bluetooth gateway?
Yes, it can work as a Bluetooth gateway for supported Shelly BLU devices.
Can it extend Zigbee coverage?
Yes, the Shelly 1 Gen4 ANZ supports Zigbee repeater functionality when used in a compatible Zigbee network.
What happens if I pair it in the wrong mode?
The device can be reset or placed back into inclusion mode using the physical button. You can also switch from Matter profile to Zigbee profile using the device button sequence.
Final Thoughts
The Shelly 1 Gen4 ANZ is a powerful and flexible smart relay for customers who need compact, reliable, dry contact switching with modern smart home compatibility.
Its support for Wi-Fi, Bluetooth, Zigbee, and Matter makes it suitable for a wide range of installations, from simple app-based control through to advanced Home Assistant automations.
For garage doors, gates, contactors, lighting, fans, towel rails, and other compatible loads, the Shelly 1 Gen4 ANZ is one of the most versatile relay options available.
If you need power monitoring, choose a Shelly 1PM model instead. If you need dry contact switching, the Shelly 1 Gen4 ANZ is the better option.