Shelly Wave 1 vs Shelly 1L Gen4: Z-Wave vs Wi-Fi Relay Comparison

When building or expanding a smart home, choosing between Z-Wave and Wi-Fi relays can be a pivotal decision. Both protocols offer reliable control of lights, appliances, and more, but they differ in network architecture, range, and ecosystem compatibility. Shelly, a leader in smart relay technology, offers two compelling options: the Shelly Wave 1, a Z-Wave relay designed for mesh networks, and the Shelly 1L Gen4, a Wi-Fi relay that integrates seamlessly with cloud and local control. This comparison will help you understand the strengths and trade-offs of each, so you can select the best relay for your specific needs.

Whether you are a seasoned smart home enthusiast or a beginner, understanding the nuances between these two relays is essential. The Shelly Wave 1 leverages the Z-Wave protocol for low-power, reliable mesh communication, while the Shelly 1L Gen4 uses Wi-Fi for direct connection to your home network. Let's dive into the key differences in connectivity, installation, features, and use cases to guide your decision.

Connectivity and Protocol: Z-Wave Mesh vs Wi-Fi Direct

The most fundamental difference between the Shelly Wave 1 and the Shelly 1L Gen4 lies in their wireless protocols. The Shelly Wave 1 is a Z-Wave relay that operates on the Z-Wave mesh network. In a mesh network, each Z-Wave device acts as a repeater, extending the range and improving reliability. This makes the Shelly Wave 1 ideal for larger homes or spaces where Wi-Fi coverage may be inconsistent. Z-Wave also operates on a dedicated frequency (typically 800-900 MHz, depending on region), which reduces interference from crowded 2.4 GHz Wi-Fi bands.

In contrast, the Shelly 1L Gen4 is a Wi-Fi relay that connects directly to your home router. It uses the 2.4 GHz Wi-Fi band, which is universally available but can suffer from interference from other Wi-Fi devices, microwaves, and Bluetooth. Wi-Fi relays are generally easier to set up for users already familiar with their home network, and they offer fast, direct communication. However, they do not form a mesh network, so range is limited by your router's signal strength. For users with a strong Wi-Fi network, the Shelly 1L Gen4 provides a straightforward and responsive experience.

• Shelly Wave 1: Z-Wave mesh network, extended range, low interference, requires Z-Wave hub.
• Shelly 1L Gen4: Wi-Fi direct, easy setup, no hub required, subject to Wi-Fi congestion.

Installation and Wiring: Neutral Wire Requirements

Both the Shelly Wave 1 and Shelly 1L Gen4 are designed for in-wall or in-box installation behind switches or outlets. However, they differ in their wiring requirements. The Shelly 1L Gen4 is specifically designed for installations where a neutral wire is not available at the switch box. This makes it a perfect choice for older homes or retrofit projects where running a neutral wire would be difficult. The Shelly 1L Gen4 uses a bypass circuit to work without a neutral, allowing it to control lights and appliances in standard single-pole setups.

The Shelly Wave 1, on the other hand, typically requires a neutral wire for operation. This is standard for most smart relays, but it can be a limitation in homes built before the 1980s where switch boxes often lack neutral. If you have neutral wires available, the Shelly Wave 1 offers a robust Z-Wave solution. For those without neutral, the Shelly 1L Gen4 is the clear winner. Always consult a qualified electrician before installation to ensure safety and compliance with local codes.

• Shelly 1L Gen4: No neutral wire required – ideal for retrofit.
• Shelly Wave 1: Requires neutral wire – standard for new constructions.

Smart Home Ecosystem and Compatibility

Ecosystem compatibility is a key factor when choosing between these two relays. The Shelly Wave 1 is a Z-Wave device, meaning it works with any Z-Wave hub or controller, such as SmartThings, Hubitat, or Home Assistant with a Z-Wave stick. This allows integration with a wide range of Z-Wave sensors, locks, and other devices. Z-Wave is known for its interoperability and security, making it a favorite among advanced users who want a local, cloud-independent system.

The Shelly 1L Gen4 uses Wi-Fi and is compatible with the Shelly Cloud app, as well as major smart home platforms like Amazon Alexa, Google Assistant, and HomeKit via Homebridge. It also supports MQTT and HTTP for local control, giving users flexibility. Wi-Fi relays are generally easier to integrate with existing smart home setups without additional hardware. However, they rely on your Wi-Fi network and cloud services for some features, which can be a concern for privacy and reliability during internet outages.

• Shelly Wave 1: Requires Z-Wave hub, excellent for local automation, strong interoperability.
• Shelly 1L Gen4: Works with Shelly Cloud, Alexa, Google, no hub needed, but cloud-dependent.

Use Cases: Which Relay Fits Your Scenario?

The choice between the Shelly Wave 1 and the Shelly 1L Gen4 ultimately depends on your specific use case. If you are building a Z-Wave smart home and need a reliable relay for lighting or appliances in areas with weak Wi-Fi, the Shelly Wave 1 is an excellent choice. Its mesh networking ensures stable control even in large homes. For example, you can pair it with Z-Wave sensors like the Shelly H&T white for temperature-based automation without burdening your Wi-Fi network.

On the other hand, if you are retrofitting an older home without neutral wires or prefer a simple Wi-Fi setup, the Shelly 1L Gen4 is ideal. It works seamlessly with the Shelly ecosystem and can be controlled via the Shelly Plus Plug IT for energy monitoring. For users who want a straightforward, no-hub solution for basic on/off control, the Shelly 1L Gen4 offers convenience and ease of use.

Both the Shelly Wave 1 and Shelly 1L Gen4 are excellent relays, but they serve different needs. The Shelly Wave 1 is perfect for Z-Wave enthusiasts seeking a robust mesh network, while the Shelly 1L Gen4 is ideal for those who need a neutral-free Wi-Fi relay. Assess your home's wiring, network, and ecosystem to make the right choice. For a reliable Wi-Fi relay that works without a neutral, explore the Shelly 1 Gen4 to see if it fits your project.