Model: 1xPro3EM-Add-On-US
from $20.69
The Shelly Pro 3EM Switch Add-On is a wired accessory designed to expand the functionality of your Shelly Pro 3EM device. This gray, DIN rail mountable add-on provides dry contacts, making it suitable for integration with systems such as solar panels and wind turbines. It comes with a 1-year warranty and is returnable within 90 days.
Hubs centralize control across protocols. Matter + Thread is the emerging cross-brand standard. Available from $20.69.
Hubs centralize control across protocols. Matter + Thread is the emerging cross-brand standard. Key decision: ecosystem lock-in (Amazon/Google/Apple) vs open standard (Home Assistant). Check Zigbee, Z-Wave, and Thread support.
Hardware lasts 5-10 years. Software support is the real constraint — proprietary hubs lose cloud support after 3-7 years. Open-source platforms have indefinite software life.
The Shelly Pro 3EM Switch Add-On, Add-On For Shelly Pro 3EM, Dry Contacts, DIN Rail Mounting, Solar Panels, Wind Turbines is available at homedepot, starting at $20.69.
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