Comparison of Shelly Gen1, Gen2, Gen3 and Gen4 Devices

Shelly smart home devices have significantly evolved over four generations, with each bringing improvements in performance, connectivity, and features. Here's a brief overview of the key differences between Shelly Gen 1, Gen 2, Gen 3 and GEN 4 devices.

1. Shelly Gen 1:

• Wi-Fi connectivity (2.4 GHz)
• Basic processing power and memory
• Basic energy monitoring in select models
• Support for MQTT, CoAP, and HTTP webhooks

2. Shelly Gen 2 (Plus Series, Mini, Pro Series):

• Wi-Fi connectivity
• More powerful processors and larger memory (up to 4MB Flash, 8MB Flash for PRO devices)
• Bluetooth support for easier setup
• Bluetooth Gateway support for BLU devices (except Shelly BLU TRV, Shelly BLU Gateway Gen 3 required)
• Scripting capabilities for advanced automation
• Enhanced energy monitoring in some devices
• Support for MQTTS and HTTP/HTTPS webhooks
• Improved hardware compared to Gen 1
• Simultaneous MQTT and Cloud support
• KVS (Key-Value Store) for extended functionality
• Timer loop (Auto ON / Auto OFF at the same time)
• Range Extender
• Simultaneous AP (Access Point) and Wi-Fi connection
• Virtual components support (Pro only)
• BTHome support (Pro only)
• Ethernet (Pro only)

3. Shelly Gen 3:

• Shelly chip for optimal performance
• Largest memory capacity (8MB Flash, 256KB RAM)
• Bluetooth support for easy setups
• Bluetooth Gateway support for BLU devices (except Shelly BLU TRV, Shelly BLU Gateway Gen 3 required)
• Enhanced scripting capabilities for advanced automation
• Advanced energy monitoring, safety features, and Matter protocol support in some models ( Shelly Plug S Gen 3 OCT 2024 YTD )
• Best suited for complex automation and future-proof setups
• Support for virtual components
• KNXnet/IP support in specific devices
• Support for HTTP/HTTPS webhooks and MQTTS
• Improved hardware compared to Gen 2
• Simultaneous MQTT and Cloud support
• KVS
• Timer loop (Auto ON / Auto OFF at the same time)
• BTHome support
• Range Extender
• Simultaneous AP and Wi-Fi connection

4. Shelly Gen 4 (Latest Generation)

• Wi-Fi Connectivity: 2.4 GHz Wi-Fi (WiFi 6 supported)

• Processing Power: Most powerful to date, optimized for high-performance automation

• Memory: More RAM than Gen 3 - 512KB

• Bluetooth Support for easy setups

• Bluetooth Gateway support for BLU devices

• Scripting Capabilities: Advanced scripting and automation capabilities

• Energy Monitoring: Advanced energy monitoring, safety features

• Supports MQTTS, HTTP/HTTPS webhooks, Simultaneous MQTT & Cloud support

• Virtual Components: Supported

• KNXnet/IP  Support: Available in specific devices

• KVS (Key-Value Store): Yes

• Timer Loop: Auto ON / Auto OFF at the same time

• BTHome support

• Range Extender: Yes (Wi-Fi and Zigbee range extender capabilities)

• Simultaneous AP & Wi-Fi: Yes

• Multi-Communication Protocol Support:

  • Wi-Fi

  • Matter

  • Bluetooth: BLE support for seamless pairing and gateway support for BLU Devices (except BLU TRV). 

  • Zigbee: Zigbee hub required and HomeAssistant integration.

• Best Use Case: Cutting-edge automation, ideal for both residential and commercial use, multi-protocol support for maximum flexibility