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 a complementary 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 switching loads on and off based on detected consumption. DIN rail mount.

Technical specifications:

• Compatibility: Shelly Pro 3EM (requires base module)
• Connection: Shelly proprietary bus (dedicated interface)
• Power supply: 110 – 240V AC (via 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: switches loads on/off based on 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

Use cases:

• Automatic load shedding when exceeding the contracted electrical consumption threshold
• Control of accumulators and heat pumps based on photovoltaic production
• Management of deferrable loads to optimize solar self-consumption
• Activation of contactors in industrial installations based on detected demand

Compatible with Home Assistant, Amazon Alexa, and Google Home (via the Shelly Pro 3EM).

• Connection: Shelly proprietary Bus (requires Shelly Pro 3EM)
• Communication managed by the base Shelly Pro 3EM (WiFi + Ethernet + BLE 4.2)

Resources and documentation:

• Official Knowledge Base (KB)
• This device
• All Shelly devices and services