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The Shelly 2.5! A small diamond brought together the best experience and engineering. Completely re-engineered. Extremely small: just 39 x 36 x 17mm. Shelly 2.5 fit everywhere, under the existing wall console even if there are a lot of cables. It's 30% smaller than Shelly 2 and 5% smaller than Shelly 1. Shelly 2.5 maximum load is 2x 2300W or 2x 10A without any issue. Independent dual power metering for each channel overload and temperature protection. Shelly 2.5 is a double relay switch and roller shutter.


  • Double Relay Switch & Roller Shutter functionality - Shelly 2.5 is multifunctional. You can easily switch between these 2 modes and control 2 independent electric circuits or a 3-wire motor.
  • Embedded Web Server - You can control any electrical equipment up to 10A per channel. Thus you can control a wide range of home appliances and office equipment.
  • Power Supply - 110-230V ± 10, 50 / 60Hz AC and 24-60V DC Shelly 2.5 is compatible with all major international voltage standards
  • Wireless 802.11 b / g / n (2.4 GHz) - Shelly 2.5 can connect directly to any Wi-Fi network, no HUB required or can operate as an Access Point.
  • Maximum load per output - 10A / 230V 50 / 60Hz. You can control a wide range of home appliances and office equipment.
  • Dual Power Metering - Shelly 2.5 has two integrated precise power meters. You can measure the consumption for each channel separately.
  • Overheating Protection - Internal temperature sensor for overheating protection
  • Shelly Mobile App Control - Turn devices on / off directly from your smartphone or tablet. You can control lightning, heating and any other connected electrical appliance in your house.
  • Sunrise / Sunset Schedule - Shelly 2.5 can automatically turn on / off based on the sunrise and sunset hours
  • Weekly Schedules - Choose a time and create custom daily schedules for your devices.

Wiring schemes

Protected like never before

No more wiring issues. You can revert AC or External switch poles whenever you need.

Warning! Both relay inputs are interconnected and should be on the same pole. Internal temperature sensor for overheating protection. If the PCB temperature goes at danger level for any reason, the device will switch off.


Shelly 2.5 comes with a programming / debug header which can be used to flash alternative firmware on the device. It has an ESP8266 inside, with a 2MB flash chip. A USB-to-UART adapter is needed as well as a reliable 3.3V with at least 350 mA drive capability.

Grade! To flash your Shelly with new firmware, you can use the CP2102 USB to UART converter!

Supported Home Automation Software & Protocols

  • MQTT
  • ioBroker
  • Home Assistant
  • openHAB
  • Domoticz
  • REST


Shelly RGBW2 is compatible with Alexa, Google Home, Android, and iOS. With the voice assistants, you can give commands to Shelly with your voice while you are sitting on the couch. And also, you can manage Shelly RGBW2 through your mobile phone while you are at the store.

  • Amazon Alexa
  • Google Home
  • Android
  • iOS

Guarantee case

For warranty inquiries about Shelly products, you can open a case as a ticket directly with the manufacturer and describe the problem. If the manufacturer has agreed to an exchange, we ask you to send us a copy of the confirmation by email.

Shelly warranty request

Support - be sure to note!