{"product_id":"shelly-pro-3em-400-din-rail-3-phase-smart-energy-meter-with-wi-fi-lan","title":"Shelly Pro 3EM-400 DIN Rail 3-Phase Smart Energy Meter with Wi-Fi \u0026 LAN","description":"\u003cdiv\u003e\n\u003ch1\u003eShelly Pro 3EM-400 DIN Rail 3-Phase Smart Energy Meter with Wi-Fi \u0026amp; LAN\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eShelly Pro 3EM-400\u003c\/strong\u003e is a professional \u003cstrong\u003eDIN rail mountable three-phase energy meter\u003c\/strong\u003e designed for advanced energy monitoring in homes, offices, and industrial installations. With \u003cstrong\u003eWi-Fi, Bluetooth, and LAN connectivity\u003c\/strong\u003e, this Gen2 device delivers real-time monitoring of voltage, current, power factor, and accumulated energy across three phases or individual circuits. Perfect for monitoring solar PV systems, business electrical circuits, appliances, and EV charging stations, the Shelly Pro 3EM-400 handles up to \u003cstrong\u003e400A per phase\u003c\/strong\u003e and features \u003cstrong\u003e1% active energy measurement accuracy\u003c\/strong\u003e (Class B compliance with IEC 62053-21). It stores up to \u003cstrong\u003e60 days of historical data\u003c\/strong\u003e with 1-minute resolution and requires no hub or subscription.\u003c\/p\u003e\n\n\u003ch2\u003eAdvanced Energy Monitoring for Professionals\u003c\/h2\u003e\n\u003cp\u003eThe Shelly Pro 3EM-400 provides \u003cstrong\u003ereal-time reporting\u003c\/strong\u003e of instantaneous voltage, current, active power, apparent power, and power factor per phase. It features \u003cstrong\u003e4-quadrant measurement\u003c\/strong\u003e, allowing it to track both energy consumption and production, making it ideal for photovoltaic (solar) installations and bi-directional energy flow monitoring. With support for \u003cstrong\u003eMODBUS TCP\u003c\/strong\u003e, the device delivers precise data sampling with updates as fast as every \u003cstrong\u003e100 milliseconds\u003c\/strong\u003e using customizable firmware.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasures up to 400A per phase\u003c\/strong\u003e: Includes 3 × 400A split-core current transformers (suitable for cables up to 35mm diameter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1% measurement accuracy\u003c\/strong\u003e: Class B active energy compliance based on IEC 62053-21 manufacturer testing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBi-directional energy monitoring\u003c\/strong\u003e: Tracks both consumption and production across three phases\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60-day data storage\u003c\/strong\u003e: On-device non-volatile memory with 1-minute interval logging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple connectivity\u003c\/strong\u003e: Wi-Fi 802.11 b\/g\/n, Bluetooth, and Ethernet (RJ-45 LAN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry-grade security\u003c\/strong\u003e: mTLS support for MQTT, HTTP, and secure outbound WebSockets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase sequence error detection\u003c\/strong\u003e: Optional monitoring to ensure correct wiring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical pulse indication\u003c\/strong\u003e: Visual feedback for energy usage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScripting support\u003c\/strong\u003e: Gen2 firmware with mJS scripting for custom automation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo hub required\u003c\/strong\u003e: Works standalone or integrates with Home Assistant, Amazon Alexa, Google Home, MQTT, and HTTP REST API\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProfessional Integration \u0026amp; Security\u003c\/h2\u003e\n\u003cp\u003eBuilt for professional integrators, the Shelly Pro 3EM-400 supports \u003cstrong\u003eindustry-grade mTLS encryption\u003c\/strong\u003e for secure cloud connectivity without the need for complex VPNs. It can operate standalone in a local LAN or Wi-Fi network, or be integrated into cloud-based home automation systems via MQTT, HTTP, and WebSocket protocols. All inbound connections support TLS encryption. The device is fully compatible with \u003cstrong\u003eHome Assistant\u003c\/strong\u003e (local control), Amazon Alexa, Google Home, and supports advanced scripting for complex automation scenarios.\u003c\/p\u003e\n\n\u003ch2\u003eSolar \u0026amp; Renewable Energy Ready\u003c\/h2\u003e\n\u003cp\u003eThe Shelly Pro 3EM-400 is \u003cstrong\u003ephotovoltaic ready\u003c\/strong\u003e, making it perfect for monitoring solar panel systems, wind turbines, and other renewable energy sources. Track real-time energy production, analyze two months of historical performance data, and link with other Shelly devices to automate energy management based on solar output. Automate heating, cooling, and EV charging with intelligent power shedding for optimized energy use.\u003c\/p\u003e\n\n\u003ch2\u003eEasy Installation \u0026amp; Flexible Configuration\u003c\/h2\u003e\n\u003cp\u003eThe device mounts easily on standard \u003cstrong\u003eDIN rails\u003c\/strong\u003e and features screw terminals for quick wiring (supports 0.5 to 2.5 mm² \/ 20 to 14 AWG conductors). It can be configured to measure a three-phase electrical system or three separate mono-phase circuits. The package includes \u003cstrong\u003e3 × 400A current transformers\u003c\/strong\u003e with snap-on, screwless mounting and 2-pin MX3.0-2x1Y connectors. An optional 4th CT can be used for neutral line monitoring (requires separate Shelly Pro Addon for contactor control).\u003c\/p\u003e\n\n\u003ch2\u003eSmart Monitoring \u0026amp; Alerts\u003c\/h2\u003e\n\u003cp\u003eMonitor your home, office, or factory in real-time and avoid unexpected expenses or voltage drops that can damage appliances and equipment. The free \u003cstrong\u003eShelly app\u003c\/strong\u003e (iOS and Android) allows you to manage spaces, monitor energy usage, track expenses, and set up automation rules. Upgrade to Shelly Cloud Premium for advanced features and extended data analytics.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShelly Pro 3EM-400 Energy Meter (DIN rail mountable)\u003c\/li\u003e\n\u003cli\u003e3 × 400A Current Transformers (CT) with 2-pin connectors\u003c\/li\u003e\n\u003cli\u003eMultilingual User and Safety Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\n\u003ch3\u003eElectrical \u0026amp; Measurement\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Type\u003c\/td\u003e\n\u003ctd\u003e3-phase energy meter (or 3 × mono-phase circuits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Measurement Range\u003c\/td\u003e\n\u003ctd\u003eUp to 400A per phase (plus neutral)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Transformers Included\u003c\/td\u003e\n\u003ctd\u003e3 × 400A split-core CT (model CT315)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCT Cable Compatibility\u003c\/td\u003e\n\u003ctd\u003eUp to 35mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e1% active energy (Class B, IEC 62053-21 compliant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Type\u003c\/td\u003e\n\u003ctd\u003e4-quadrant (capacitive and inductive loads, bi-directional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMonitored Parameters\u003c\/td\u003e\n\u003ctd\u003eVoltage, current, active power, apparent power, reactive power, power factor, accumulated energy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Update Rate\u003c\/td\u003e\n\u003ctd\u003eAs fast as 100ms (customizable via firmware)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Storage\u003c\/td\u003e\n\u003ctd\u003e60 days, 1-minute intervals, non-volatile memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Load per Channel\u003c\/td\u003e\n\u003ctd\u003e500W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eConnectivity \u0026amp; Protocols\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi Protocol\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi Range\u003c\/td\u003e\n\u003ctd\u003eUp to 30m \/ 100ft indoors, 50m \/ 160ft outdoors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet (LAN)\u003c\/td\u003e\n\u003ctd\u003eRJ-45 connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSimultaneous Connectivity\u003c\/td\u003e\n\u003ctd\u003eEthernet and Wi-Fi simultaneously supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Protocols\u003c\/td\u003e\n\u003ctd\u003eMQTT, HTTP, WebSocket (inbound\/outbound), UDP, MODBUS TCP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecurity\u003c\/td\u003e\n\u003ctd\u003emTLS for MQTT, HTTP, and secure outbound WebSockets; TLS for inbound connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCloud Integration\u003c\/td\u003e\n\u003ctd\u003eShelly Cloud (optional, no subscription required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmart Home Compatibility\u003c\/td\u003e\n\u003ctd\u003eHome Assistant (local), Amazon Alexa, Google Home\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScripting\u003c\/td\u003e\n\u003ctd\u003emJS scripting support (Gen2 firmware)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003ePhysical \u0026amp; Installation\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e94 × 19 × 69 mm (±0.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e62g (±1g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN rail (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eScrew terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Screw Torque\u003c\/td\u003e\n\u003ctd\u003e0.4 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor Cross-Section\u003c\/td\u003e\n\u003ctd\u003e0.5 to 2.5 mm² \/ 20 to 14 AWG (solid, stranded, ferrules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Stripping Length\u003c\/td\u003e\n\u003ctd\u003e6 to 7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Altitude\u003c\/td\u003e\n\u003ctd\u003eUp to 2000m \/ 6562ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Options\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Sequence Error Detection\u003c\/td\u003e\n\u003ctd\u003eYes (optional, based on zero-crossing detection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Pulse Indicator\u003c\/td\u003e\n\u003ctd\u003eYes (red LED flashes based on energy flow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReal-Time Clock\u003c\/td\u003e\n\u003ctd\u003eYes (maintains time if SNTP server connection lost)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in Relay\u003c\/td\u003e\n\u003ctd\u003eNo (requires Shelly Pro Addon for contactor control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhotovoltaic (PV) Ready\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware Generation\u003c\/td\u003e\n\u003ctd\u003eGen2 (Plus\/Pro series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eWarranty \u0026amp; Compliance\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Warranty\u003c\/td\u003e\n\u003ctd\u003e5 years (Shelly Pro series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Plus Available\u003c\/td\u003e\n\u003ctd\u003eYes (12-month replacement for any damage including improper wiring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eIEC 62053-21 (Class B), EU Declaration of Conformity, UK PSTI ACT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Certifications\u003c\/td\u003e\n\u003ctd\u003eISO 14001:2015, ISO 27001:2022, ISO 9001:2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign \u0026amp; Development\u003c\/td\u003e\n\u003ctd\u003eEU (Shelly Europe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eSpecifications are sourced from the manufacturer product page and may be updated.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Shelly","offers":[{"title":"Default Title","offer_id":44390165610574,"sku":"PA-SHELLYPRO3EM400","price":458.7,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/3134\/9838\/files\/em_20pro_20400.png?v=1790324128","url":"https:\/\/projectorsaustralia.com.au\/products\/shelly-pro-3em-400-din-rail-3-phase-smart-energy-meter-with-wi-fi-lan","provider":"Projectors Australia","version":"1.0","type":"link"}