Shelly Pro 3EM Switch Add-On

Shelly Pro 3EM Switch Add-On — Relay Module for Shelly Pro 3EM

The Shelly Pro 3EM Switch Add-On is an accessory module designed to connect directly to the Shelly Pro 3EM via Shelly's proprietary bus. It adds a 16A relay output to the three-phase meter, turning the meter into a controller capable of automatically activating and deactivating loads based on detected consumption. DIN rail mountable. No hub or additional subscriptions required.

Technical Specifications — Shelly Pro 3EM Switch Add-On

• Compatibility: Shelly Pro 3EM (requires base module)
• Connection: Shelly proprietary bus (dedicated interface)
• Power Supply: 110 – 240V AC (provided by the Shelly Pro 3EM)
• Relay Output: 1 channel, up to 16A
• Mounting: DIN rail
• Operating Temperature: -20 to +40°C
• Certifications: CE, RoHS

Key Features

• Extends the Shelly Pro 3EM with relay output for real load control
• Consumption-based automations: activates/deactivates loads according to detected power thresholds
• Control of contactors and industrial loads up to 16A
• Integrated configuration in the base Shelly Pro 3EM interface
• DIN rail installation next to the meter, without complex additional wiring

Compatible with

• Home Assistant (via Shelly Pro 3EM)
• Amazon Alexa
• Google Home
• MQTT, HTTP REST API (via Shelly Pro 3EM)

Use Cases

• Automatic load shedding when exceeding the contracted electricity consumption threshold
• Control of storage heaters and heat pumps according to photovoltaic production
• Management of deferrable loads (dishwasher, washing machine) to optimize self-consumption
• Activation of contactors in industrial installations according to detected demand

Official Shelly distribution. Shipping from Spain. Official Shelly warranty.