Shelly EM Gen3

Device identification Device name: Shelly EM Gen3 Device model: S3EM-002CXCEU Device SSID: ShellyEMG3-XXXXXXXXXXXX BLE Model ID: 0x1027 Short description Shelly EM Gen3 (the Device) is a small form factor smart energy meter using up to 2 current transformers (contactless metering), which allows energy metering the consumption of electric appliances and reporting to a mobile phone, tablet, PC, or home automation system. It can work standalone in a local Wi-Fi network, or it can also be operated through cloud home automation services. The Device has internal storage for data allowing for later retrieval. The Device has single dry contact switch for controlling external loads. Shelly EM Gen3 can be accessed, controlled, and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi access point and the Internet. Shelly EM Gen3 can be retrofitted into standard electrical wall boxes, next to electrical appliances, power sockets, or in other places with limited installation space. Shelly EM Gen3 has an embedded Web Interface which can be used to monitor, configure, and control the device. Main features Compact form factor Single phase, two channels measurement Current transformer connection Dry contact relay for contactor control Real-time clock Data logs stored on device for up to 10 days of minute data records Use cases Power Consumption Monitoring: Monitor the power consumption of connected devices in real-time. This information can be valuable for understanding energy usage patterns and making informed decisions to reduce consumption. Energy Efficiency Optimization: Identify electrical energy consumption patterns and optimize electricity usage. Appliance Health Check: Keep track of the power usage of individual appliances to assess their health and performance over time. Sudden spikes or changes in power consumption may indicate issues with the appliance. Cost Management: With the knowledge of power consumption, you can estimate the cost of running specific devices and manage your electricity expenses more effectively. Space-Efficient Retrofitting: Integrate the device into standard electrical wall boxes, behind power sockets, light switches, or other locations with limited space. Remote Monitoring: Shelly EM Gen3 supports publishing data to Shelly cloud or other cloud-based data collection and storage systems. This allows you to monitor power consumption even when you’re away from home. Local Monitoring: Like the rest of the Shelly Wi-Fi line of devices Shelly EM Gen3 allows for local only monitoring and automations. Access stored energy consumption records directly from the device UI. Automate locally with rules based on instantaneous power consumption or energy consumer for a period of time. Main applications Residential MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)… Light commercial (small office buildings, small retail/restaurant/gas station, etc.)… Industrial (factories, power plants, water processing, refineries, etc.)… Government/municipal University/college Farming Simplified internal schematics Connectivity Wi-Fi Bluetooth Protocols MQTT HTTP WebSocket RPC Safety function Internal temperature sensing and reporting Supported load types Resistive (incandescent bulbs, heating devices) Capacitive (LED light drivers, capacitor banks, electronic equipment, motor start capacitors) Inductive (transformers, fans, refrigerators, air-conditioners) User interface Inputs One (Control) button Press and hold for 5 seconds to enable Device access point and Bluetooth connection. Press and hold for 10 seconds to factory reset the Device. Outputs LED (monocolor) indication AP (Access Point) enabled and Wi-Fi disabled: 1 second ON / 1 second OFF Wi-Fi enabled, but not connected to a Wi-Fi network: 1 second ON / 3 seconds OFF Connected to a Wi-Fi network: Constantly ON Cloud is enabled, but not connected: 1 second ON /5 seconds OFF Connected to Shelly Cloud: Constantly ON OTA (Over the Air Update): ½ sec ON / ½ second OFF Button pressed and held for 5 seconds: ½ second ON / ½ second OFF Button presses and held for 10 seconds: ¼ second ON / ¼ second OFF The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one. Specifications Quantity Value Physical Size (HxWxD): 37x42x16 mm / 1.46×1.65×0.63 inch Weight: EM Gen3 – 23 g / 0.81 oz CT 50A – 50 g / 1.76 oz Screw terminals max torque: 0.4 Nm / 3.5 lbin Conductor cross section: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) Conductor stripped length: 6 to 7 mm / 0.24 to 0.28 in Mounting: Wall console, Electrical cabinet Shell material: Plastic Shell color: White Charcoal gray Connectors color: Black Environmental Ambient working temperature: -20 °C to 40 °C / -5 °F to 105 °F Humidity: 30 % to 70 % RH Max. altitude: 2000 m / 6562 ft Electrical Power supply: 110 – 240 V~ 50/60 Hz Power consumption: < 1.2 W Neutral not needed: Yes or No External protection: 2 A, tripping characteristic B or C, 6 kA interrupting rating, Energy limiting class 3 Output circuits ratings Max. switching voltage: 240 V~ Max. switching current: 2 A/240 V~ Sensors, meters Voltmeter (AC): 110-240 V~ 50/60 Hz Voltmeter accuracy: ±2% Ammeter (AC): 0 – 80A Ammeter accuracy: ±2 % (2 – 50 A), ±2 % (1 – 2 A), ±5 % (0 – 1 A) Compatible current transformers: CT 50A (included in the package) CT 80A Power and energy meters: Active and apparent power Active and apparent energy Power factor Fundamental active and fundamental reactive energy Channel-to-channel calibration minimum load: 500 W No load threshold: 30 VA per channel Measurement data storage: At least 10 days of 1 min data resolution Data export: CSV for PQ recorded values JSON format export through RPC Internal-temperature sensor: Yes Radio Wi-Fi Protocol: 802.11 b/g/n RF band: 2412 – 2472 МHz Max. RF power: < 20 dBm Range: Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) Bluetooth Protocol: 4.2 RF band: 2402 – 2480 MHz Max. RF power: < 4 dBm Range: Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) Microcontroller unit CPU: ESP-Shelly-C38F Flash: 8 MB Firmware capabilities Schedules: Yes Webhooks (URL actions): 20 with 5 URLs per hook Scripting: Yes MQTT: Yes Encryption: Yes (Transport level) Authentication: Yes (Application and transport level) Basic wiring diagrams Legend Terminals Wires O Load circuit output terminal L Live (110-240 V) wire I Load circuit input terminal N Neutral wire IA First channel current transformer input Current transformers IB Second channel current transformer input CTA First channel current transformer L Live (110-240 V) terminal CTB Second channel current transformer N Neutral terminal   Troubleshooting Check the correct installation of the CT: If negative readings on a measured circuit are read and are not expected, check the correct installation of the CT (K->L). Ensure that the device is properly powered: Check power cables, outlets, and any power indicators on the device. Inspect Connections: Verify that all connections, including cables and wiring, are secure and properly seated. Loose connections can lead to functionality issues. Review Device Settings: If applicable, check and review the device settings. Ensure that configurations are correct and match your intended use. Update Firmware/Software: Check if there are any available firmware or software updates for the device. Keeping the device up-to-date can resolve known issues and improve performance. Restart or Reboot: Sometimes, a simple restart can resolve temporary glitches. Turn off the device, wait a few seconds, and then power it back on. Check Network Connection: If the device is connected to a network, ensure that the network settings are correct. Test the network connection and consider restarting routers or switches if needed. Inspect Physical Components: Physically inspect the device for any signs of damage, overheating, or unusual behavior. Check Compatibility: Ensure that the device is compatible with other components in your system, including hardware and software. Incompatibility issues can lead to malfunctions. Monitor Environmental Factors: Consider environmental factors such as temperature and humidity. Inspect Power Supply Quality: Poor power quality, including voltage spikes or fluctuations, can affect device performance. Consider using a surge protector or voltage regulator if needed.