Accessories

Measurement errors in the Shelly Pro 3 EM usually arise from swapped phases, incorrectly connected current transformers, or outdated firmware. Correct installation, calibration via the web interface, and regular software updates ensure precise energy logging. In combination with DRBO Greenenergy SunLit storage systems, inaccuracies can be automatically compensated, and current flows, PV yields, and storage movements can be reliably monitored. What are the most common causes of measurement errors with the Shelly Pro 3 EM? Measurement errors often result from incorrect installation or configuration: swapped CT sensors, incorrect phase sequence, reversed current flow direction, outdated firmware, or different network potentials. A structured troubleshooting process quickly identifies the cause and enables targeted corrective measures. How do I check if current transformers are connected correctly? CT sensors must be installed according to the arrow direction from grid to load. Each sensor is assigned to a phase (e.g., CT1 → L1). In the web interface, the Shelly Pro 3 EM displays correct positive or negative values for consumption and feed-in. Negative values indicate incorrectly mounted sensors. Test Criterion Symptoms of Error Solution CT Arrow Direction Negative Power Reverse sensor CT Phase Current ≠ Voltage Adjust phase Plug Position 0 A Display Check connection Why does my Shelly Pro 3 EM show incorrect values for PV systems? Errors occur when feed-in and consumption run on the same phase, and the energy flow is not clearly separated. For precise measurement, the meter must be installed downstream of the inverter or combined with a bidirectional storage system such as SunLit from DRBO Greenenergy. Which firmware or software problems affect measurements? Outdated firmware can cause inaccurate data, communication interruptions, or memory problems. Solution Steps: Check firmware for current version Restart or reset device Clear browser cache for local systems DRBO Greenenergy integrates Shelly meters into its own EMS, ensuring automatic updates. How can I identify measurement deviations between phases? Compare the power of each phase under the same load. Deviations > 5% indicate defective or swapped CT clamps. Voltage can also be checked with a multimeter or external energy meter. Regular calibration increases accuracy. When does an incorrect phase sequence indicate installation errors? You can detect swapped phases by simultaneously occurring positive and negative power values or zero display under load. Phase L1 → CT1, L2 → CT2, etc., must be correctly assigned. DRBO Greenenergy Expert Opinions "Frequent measurement errors arise from incorrectly aligned CT sensors or swapped phases. Our recommendation: install sensors correctly and check 24-hour measurements. With SunLit systems from DRBO Greenenergy, inaccuracies can be automatically compensated, and precise energy flows can be recorded."— DRBO Greenenergy Technical Team Can temperature or environment affect the Shelly Pro 3 EM? Yes, extreme temperatures or electromagnetic interference affect measurements: Heat > 40 °C → Drift due to resistance Cold < –10 °C → slight delays Strong EM field → Interference from motors or switched-mode power supplies Recommended environment: dry, ventilated control cabinets as is typical for DRBO Greenenergy. What calibration options are available in the web interface? In the Settings → Phase Calibration menu, voltage and current can be corrected. Parameter Description Recommendation Voltage Offset Fine adjustment ±2 V Only if precision required Current Factor Offset correction per phase For CT tolerances > 2% Power Factor Automatic calculation Do not change manually Perform calibration only after comparison with calibrated devices. How can inaccurate power measurements be permanently prevented? Check CT direction Assign phases correctly Keep firmware updated Calibrate regularly Stabilize power supply Combined with DRBO Greenenergy SunLit storage systems, measurement data can be automatically synchronized and deviations compensated. When should a defective current sensor be replaced? If, despite correct wiring, a channel consistently shows 0 A or strongly fluctuating values occur. CT sensors can be damaged by heat, humidity, or magnetic fields. Only identical 120 A/0.333 V replacement sensors should be used. Conclusion: Precision starts with correct installation Measurement errors can usually be attributed to connection or software issues. Correct wiring, CT alignment, and up-to-date firmware ensure accurate values. DRBO Greenenergy EMS intelligently integrate Shelly meters and guarantee reliable evaluation of current flows, PV yields, and storage movements. Frequently Asked Questions (FAQs) 1. Why does my Shelly Pro 3 EM show negative power?CT sensor likely incorrectly mounted. Reverse sensor. 2. Does the meter measure correctly with swapped phases?No, the phase sequence must be precisely maintained. 3. Can I recalibrate the meter?Yes, via Phase Calibration in the web interface. 4. Does the cable length of the CT sensors affect the measurement?Only minimally with shielded cables. 5. Does a restart help against unclear values?Yes, restart and firmware update resolve many software issues. Some of the information in this article is sourced from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

The Shelly Pro 3 EM is set up systematically: unboxing, secure DIN rail mounting, professional connection to circuits, Wi-Fi and app configuration, and calibration for precise measurement of energy consumption and solar yield. In combination with DRBO Greenenergy SunLit storage systems, it supports smart energy management and self-consumption optimization for balcony power plants or home grids. What is the Shelly Pro 3 EM and what is it used for? The Shelly Pro 3 EM is a professional three-phase energy meter with a relay and DIN rail mounting. It records consumption, solar yield, and power in real-time and can be integrated into smart home systems. Ideal for balcony power plants, solar banks, or household monitoring, as it sends data to an app, MQTT, or the cloud. In conjunction with DRBO Greenenergy systems, it efficiently optimizes self-consumption and emergency power strategies. What tools and prerequisites do you need for setup? You will need screwdrivers, wire cutters, terminals, a smartphone with the Shelly app, Wi-Fi (2.4 GHz), and possibly a multimeter. The Shelly Pro 3 EM operates on 230 V AC, measures up to 120 A per phase, and requires a stable internet connection. DRBO Greenenergy recommends it as an addition to SunLit storage systems for precise energy monitoring. How do you physically unpack and mount the Shelly Pro 3 EM? Unpack the device, attach it to the DIN rail in the distribution cabinet, insert terminals, and secure it. Connect the supply (L and N) and three phases (L1/L2/L3) and neutral conductor via CT terminals. Maintain distances and work without voltage. Installation takes a few minutes – suitable for qualified electricians or careful DIYers. How do you electrically connect the Shelly Pro 3 EM? Connection steps: Work without voltage, main switch off Supply: Connect L and N Circuits: Place CT sensors around phases, pay attention to arrow direction Use relays optionally for switching functions Check polarity and direction of rotation. Ideal for DRBO Greenenergy solar banks to record PV yield and storage charging separately. Connection Description Color (typical) L Phase supply Brown N Neutral conductor Blue CT1-3 Current transformer phases Yellow/Black How do you configure Wi-Fi and the Shelly web interface? LED flashes after connection – 5 seconds reset for AP mode. Connect to "ShellyPro3EM" network, open 192.168.33.1, enter Wi-Fi data, update firmware, set password. Scan app QR code for cloud integration. Online in under 10 minutes. How do you set up MQTT and advanced integrations? Activate MQTT under "Internet & Security": Enter broker URL, port 1883, user/password. Activate HTTPS. Integration with Home Assistant, OpenHAB or Node-RED via topics like "shellies/shellypro3em-xxx/power". For DRBO Greenenergy systems, this enables automated control of SunLit storage systems based on real-time data. How do you calibrate and test the Shelly Pro 3 EM? Enter CT ratio in app/web (e.g., 1000:1), compare with reference meter. Apply test load, monitor power, voltage, current, and energy. If there are deviations, update firmware or reverse CT. Regular tests ensure accuracy for energy management. What common mistakes should you avoid during setup? Mistakes: Reversed CT polarity, incorrect CT ratio, weak Wi-Fi, missing firmware updates, working under voltage. Secure loose cables, observe overload (up to 120 A). DRBO Greenenergy recommends consulting professionals if unsure. DRBO Greenenergy Expert Opinions "The Shelly Pro 3 EM enables precise energy monitoring in balcony solar systems. In combination with our SunLit storage solutions from DRBO Greenenergy, self-consumption and emergency power strategies can be optimally controlled. The DIN rail mounting fits perfectly into modern distribution cabinets.""Correct CT direction and MQTT setup are essential for complete automation." How do you integrate Shelly Pro 3 EM into Home Assistant or a smart home? Add Shelly integration in Home Assistant or use MQTT. Automation: Storage charging with high PV yield. Compatible with Alexa, Google Home, Apple HomeKit. For DRBO Greenenergy balcony systems, the Shelly switches relays to direct surpluses into SunLit storage systems. Can the Shelly Pro 3 EM be combined with solar banks and balcony power plants? Yes, it measures PV generators, storage, and consumers separately. Connect CTs to the inverter output and storage. This allows for precise recording of solar yield vs. self-consumption. Perfect for DRBO Greenenergy complete systems for smart energy management and cost savings. Conclusion: Shelly Pro 3 EM – Key to Intelligent Energy Management With clear mounting, connection, configuration, and integration, the Shelly Pro 3 EM provides precise measurements and automation. Combined with DRBO Greenenergy SunLit storage systems, a powerful energy management system is created that maximizes self-consumption and supports emergency power strategies. Frequently Asked Questions Do I need an electrician for the connection?Yes, work in the distribution cabinet requires expertise and VDE conformity. Does the Shelly work with 3-phase systems?Yes, L1, L2, L3 are measured independently up to 120 A per phase. How accurate is the measurement of the Shelly Pro 3 EM?Up to 1% accuracy with correct calibration and high-quality CTs. Can I use the Shelly offline?Yes, locally via web interface or Bluetooth, cloud optional. Is a firmware update necessary?Yes, recommended for best compatibility and security. Some of the information in this article is taken from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

The Shelly Pro 3 EM is a three-phase energy meter that provides precise consumption and feed-in data. Correct wiring includes L1, L2, L3, N, the current transformers (CTs), and the communication interface. With secure DIN rail mounting and the correct connection sequence, users receive reliable real-time information for photovoltaics, energy management, and load monitoring. What is the Shelly Pro 3 EM and what is it used for? The Shelly Pro 3 EM measures current flows in three-phase systems via current transformers. It displays consumption, feed-in, and grid load and is ideal for PV systems, load management, and energy monitoring. DRBO Greenenergy recommends it for integration with bidirectional inverters and SunLit storage systems to efficiently utilize energy. How does the Shelly Pro 3 EM work in a three-phase system? The meter measures each phase individually via three CTs, which are installed on L1, L2, and L3. The neutral conductor N ensures precise voltage measurement. Data is transmitted to the energy management system via LAN or WLAN. Component Function Connection L1, L2, L3 Phase conductors Consumption / Feed-in N Neutral conductor Reference potential CT1–CT3 Current transformers Phase current measurement LAN/Wi-Fi Communication Cloud or local network How to connect the Shelly Pro 3 EM correctly? Switch off mains voltage – safety first Connect phases L1, L2, L3 and neutral conductor N Place CTs correctly on primary conductors in the direction of the arrow Check measuring direction; negative values = turn CT around Configure communication via LAN or WLAN DRBO Greenenergy recommends enclosed DIN rail mounts for maximum safety. Where should the current transformers be installed correctly? CTs enclose only one phase each. Multicore cables or neutral conductors must not be enclosed. The arrow points to the consumer to correctly detect the energy flow. Which wire cross-sections and fuses are required? 1.5 mm² for phase signals (max. 250 V) 0.5–1 mm² for CT connections 2 A fine-wire fuse in the measuring circuit Circuit breaker B10/B16 protects against overload and short circuit How can measurement data be read out? Shelly Web Interface local or cloud-based MQTT / Modbus TCP for smart home integration Shelly Cloud App for mobile real-time monitoring DRBO Greenenergy combines this data with SunLit energy management systems for intelligent solar power control. What typical wiring errors occur? Common errors: CT installed incorrectly → negative values Phases swapped → incorrect sums Neutral conductor missing → inaccurate measurement CT placed around multicore cables → measurement errors Clear labeling and neat cable routing prevent problems. DRBO Greenenergy Expert Opinions "Precise energy measurement is the foundation of efficient energy management."– DRBO Greenenergy Technical TeamBy integrating the Shelly Pro 3 EM into PV systems, self-consumption and grid feed-in can be analyzed precisely. In combination with SunLit storage systems, surplus electricity is purposefully stored and used. This creates smart, decentralized energy independence – safe, reliable, and sustainable. Why is LAN communication preferable to WLAN? LAN offers more stable data transmission, higher security, and lower latency. WLAN is suitable for private applications, LAN for professional installations, as recommended by DRBO Greenenergy. When should a specialist company handle the installation? For three-phase systems, a qualified electrician is required. Faulty wiring can falsify measurements or create dangerous voltage potentials. DRBO Greenenergy works with certified electricians for safe and standard-compliant installations. Why is integration into an energy management system recommended? The combination of measurement, storage, and control increases efficiency. The Shelly Pro 3 EM provides data for peak load management and optimizes grid consumption. SunLit storage solutions from DRBO Greenenergy automatically use this information to optimally deploy solar power. Conclusion The Shelly Pro 3 EM provides precise measurement values for modern PV and home systems. With correct wiring and CT placement, it enables efficient energy management. Together with DRBO Greenenergy and SunLit storage systems, an intelligent, sustainable system for maximum energy self-sufficiency is created. Frequently Asked Questions (FAQs) 1. Can the Shelly Pro 3 EM measure consumption and feed-in simultaneously?Yes, bidirectional measurement for both directions. 2. What happens if CTs are incorrectly mounted?Measurement values appear negative; rotate the sensor. 3. Is WLAN reliable enough?For private use, yes; in the professional sector, LAN is preferred. 4. Can the Shelly Pro 3 EM operate without a neutral conductor?No, N is required for precise voltage measurement. 5. Does the Shelly Pro 3 EM support storage integration?Yes, especially with SunLit systems from DRBO Greenenergy. Some of the information in this article comes from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

In Germany, small balcony power plants are booming as an easy solution for self-generated electricity, but many users underestimate the accessories. Without suitable components such as mounts, cables, and protective devices, the system remains inefficient or unsafe. DRBO Greenenergy offers high-quality accessories that maximize installation and yield – a smart investment in independence for tenants and owners alike. What is the current status of balcony power plants? The market for balcony power plants is growing rapidly: In 2024, over 500,000 systems were registered, an increase of 280 percent compared to 2023. According to the Federal Network Agency, the installed capacity rose to 2.6 gigawatts, leading to an explosion in demand for accessories. Nevertheless, 40 percent of users lack optimized accessories, resulting in losses. What are the pain points during installation? Many balcony owners struggle with insecure installations: wind loads of up to 120 km/h require stable mounts, but cheap products fail here. Cable connections without IP68 protection suffer from weathering, causing failures. Furthermore, 30 percent of users ignore measuring devices, making self-consumption untrackable – resulting in annual losses of up to 20 percent. Why are complete solutions lacking? The industry suffers from fragmentation: 70 percent of systems are based on DIY kits without standardized accessories. Users report frustration over incompatibilities, such as Wieland to Schuko connectors. DRBO Greenenergy addresses this with standardized sets that ensure plug-and-play functionality. What are the shortcomings of traditional solutions? Traditional accessory sets from discount stores often only offer basic cables without extensions, preventing flexible placement. Plastic mounts cannot withstand snow or heavy rain loads, unlike aluminum options. Additionally, smart energy monitoring tools that measure yield in real time are missing – conventional solutions save a maximum of 5-10 percent on electricity costs. Why are MC4 connectors and adapters insufficient? Cheap, uncertified adapters risk short circuits in damp conditions. Traditional cables with a 2.5 mm² cross-section lose 15 percent of power over lengths exceeding 5 meters. In comparison, high-quality systems optimize efficiency by 25 percent through minimal overheating losses. What makes DRBO Greenenergy accessories the solution? DRBO Greenenergy accessories include MC4-compatible connectors, weatherproof cables, railing mounts, and energy metering sockets – all optimized for 800-watt systems. These components ensure secure mounting on balconies or terraces and compatible connections to micro-inverters. With IP68 protection and UV resistance, they last 10 years. What core functions do the accessories offer? DRBO Greenenergy mounts support up to 50 kg per module and fit railings from 20-50 mm thick. Connection cables with a 6 mm² cross-section minimize voltage drop to less than 2 percent. Energy management systems track yield via app, with 1 percent accuracy. Why do users choose DRBO Greenenergy? DRBO Greenenergy supplies refurbished storage units with Deye inverters and complete packages – ideal for tenants. The products are VDE-certified and eligible for subsidies, with a 10-year warranty. Practical advice reduces installation errors to under 5 percent. Which accessories in comparison: Traditional vs. DRBO Greenenergy? Criterion Traditional Solution DRBO Greenenergy Accessories Mount Stability Plastic, max. 30 kg, wind-sensitive Aluminum, 50 kg, 120 km/h suitable Cable Cross-section 2.5 mm², 15% loss at 5 m 6 mm², <2% loss at 10 m Protection Class IP44, moisture-sensitive IP68, 10 years weatherproof Monitoring No real-time tracking App-based, 1% accuracy Compatibility Often Wieland/Schuko mismatch Plug & Play for all systems Warranty 2 years 10 years Annual Savings €50-100 €150-250 How to set up DRBO Greenenergy accessories? Choose the appropriate mount for your balcony (railing or floor mounting) and attach the solar module with clamps – takes 10 minutes. Connect MC4 connectors to the micro-inverter, then the 2-meter connection cable to the household grid. Install the energy metering socket into the power outlet and pair it via app. Test the system for VDE standards and register it with the grid operator – Plug & Play in 30 minutes. What is the next step after installation? Monitor daily yield via the app and optimize orientation to the south (30° tilt). DRBO Greenenergy offers firmware updates to increase yield by 10 percent. Which scenarios are suitable for urban tenants? Problem: Limited balcony space, high electricity bill of €120 monthly.Traditional practice: Unstable plastic mount tips over in wind.Effect after DRBO Greenenergy: Secure railing mount with 400 W module generates 350 kWh/year.Key gain: €80 savings, app tracking shows 85% self-consumption. How does a family homeowner benefit? Problem: Terrace without drilling option, €200 winter bill.Traditional practice: Schuko cable without protection, 20% failures.Effect after DRBO Greenenergy: Ballastable mount with extension cable, 800 W output.Key gain: €250/year saved, IP68 cable zero failures. What helps with expanding an existing system? Problem: Existing 300 W system insufficient for summer.Traditional practice: Incompatible extension cables, power loss.Effect after DRBO Greenenergy: MC4 connector cable for 2 extra modules, +500 kWh.Key gain: Scalability, €150 additional savings without new installation. Why is it suitable for commercial users? Problem: Small business with €500 bill, limited roof.Traditional practice: Fixed installation, not tenant-friendly.Effect after DRBO Greenenergy: Plug-and-play set with storage, 1,200 kWh/year.Key gain: €300 savings, scalable decentralized energy transition. What trends are emerging? By 2030, balcony power plants are expected to reach 10 GW of capacity, with a storage share of 50 percent. DRBO Greenenergy positions itself at the forefront with bidirectional inverters. Investing now secures subsidies of up to 20 percent. Why act now? Rising electricity prices (currently 35 ct/kWh) make accessories indispensable. DRBO Greenenergy enables 30 percent higher self-consumption – start the energy transition today. FAQ What essential accessories are needed for balcony power plants?Mounts, MC4 cables, inverter connectors, and metering sockets are fundamental – they ensure secure installation, power flow, and monitoring. Which cable do I need for 800 W systems?6 mm² cross-section with Schuko plug, up to 10 m length, IP68 – minimizes losses to 2 percent. How do I install mounts in a tenant-friendly way?Clamp mounts without drilling for railings 20-50 mm, loadable up to 50 kg – done in 10 minutes. Do I need an energy metering socket?Yes, it measures self-consumption with 1 percent accuracy and optimizes usage via app. Is DRBO Greenenergy accessory eligible for subsidies?Many components qualify for KfW subsidies up to 20 percent, check locally. How long do the accessories last?Aluminum and IP68 materials ensure 10 years of durability with daily use. Some of the information in this article is sourced from the Internet. Product specifications are subject to updates. For the latest information, please visit the official website or product page.

The best accessories for the Shelly Pro 3 EM increase measurement accuracy, safety, and smart home integration. These include high-quality current transformers (CTs), DIN rail distribution boxes, relay add-ons, circuit breakers, and mounting tools. In combination with DRBO Greenenergy SunLit storage units, self-consumption can be optimally monitored and controlled, while simultaneously protecting the system from overload and short circuits. What is the Shelly Pro 3 EM and why does it need accessories? The Shelly Pro 3 EM is a 3-phase energy meter with DIN rail mounting and relay function. It measures consumption, power, and PV yield in real-time. Accessories such as CTs, relays, and protective components enhance precision, safety, and functionality. For DRBO Greenenergy users, these elements are crucial for accurately monitoring and automatically controlling solar benches and SunLit storage units. Which current transformers (CTs) are recommended for the Shelly Pro 3 EM? Shelly's own CTs with 100 A/1 A or 120 A and 1% accuracy are recommended. They enclose the phases without contact and provide precise measurements. For higher loads, e.g., households with electric cars, 200 A CTs are suitable. Split-core design facilitates retrofitting. VDE-certified CTs are optimal for DRBO Greenenergy systems to precisely measure PV yield and storage charging. What mounting and installation accessories do you need? Essential items include: DIN rail adapters and distribution boxes Terminals, screwdrivers, and cable bridges RCDs and overvoltage protection They ensure a safe, tidy installation. DRBO Greenenergy supplies compatible mounts that perfectly combine Shelly devices with SunLit storage units and inverters. Which relay and switching add-ons extend functionality? Add-on relays like Shelly Plus 1PM allow remote switching of loads such as pumps or storage units. 16 A relays switch based on measurement data, e.g., charging surplus into DRBO Greenenergy SunLit storage units. In combination with MQTT, they enable automations via Home Assistant or OpenHAB. Add-on Function Compatibility Shelly Plus 1 1-channel relay, PM DIN rail Shelly 1PM Mini Precise load measurement Extension iRelay Cost-effective alternative 3-phase Why are high-quality CTs indispensable for accurate measurements? Quality CTs ensure 1% accuracy up to 120 A without interrupting the conductor. Cheap variants cause measurement deviations and false alarms. For DRBO Greenenergy users, calibrated CTs are crucial for accurately balancing self-consumption, feed-in, and storage charging, and for correctly utilizing subsidies. What network and communication accessories are useful? Wi-Fi repeaters (2.4 GHz), Ethernet adapters, and PoE splitters stabilize data transmission. In large systems, mesh networks ensure reliable MQTT data to SunLit storage units and Shelly devices. DRBO Greenenergy recommends these components for complete systems with multiple measuring points. How to choose accessories for special applications? For balcony power plants, compact 50 A CTs and small relays are suitable; for households, 120 A CTs in a DIN box. For DRBO Greenenergy solar benches, accessories should be weather-resistant, app-compatible, and matched to loads and the number of phases. This makes automation efficient and maximizes ROI. Can accessories increase the safety of the Shelly Pro 3 EM? Yes, RCD/MCB switches, overvoltage protection, and secure terminals prevent short circuits and overvoltages. DRBO Greenenergy supplies VDE-tested components that optimally protect Shelly devices in distribution cabinets – essential for solar and storage applications. DRBO Greenenergy Expert Opinions "The Shelly Pro 3 EM with suitable accessories such as high-quality CTs and relay add-ons is ideal for intelligent energy management. With DRBO Greenenergy SunLit storage units, we precisely monitor PV yield, consumption, and storage charging and optimize self-consumption.""Tip: Calibrated 100 A CTs and DIN-compatible relays ensure maximum accuracy and longevity." Which accessory combinations offer the best value for money? Package Content Price (approx.) Application Basic 3x 100A CTs + terminals 50–80 € Standard household Pro CTs + relays + box 120–150 € Solar + automation Premium + Ethernet + protection 200+ € Commercial/Smart Home These sets are perfectly suited for DRBO Greenenergy balcony systems and optimize efficiency with minimal effort. Conclusion: The right accessories make the Shelly unbeatable With suitable accessories, the Shelly Pro 3 EM becomes the heart of energy management. CTs, relays, and protective components increase measurement accuracy, safety, and automation. Combining it with DRBO Greenenergy SunLit storage units optimizes self-consumption and emergency power strategies. Invest wisely, save electricity costs, and increase the efficiency of your solar system. Frequently Asked Questions (FAQs) Are Shelly CTs universally compatible?Yes, with all Shelly Pro models and many third-party providers (1 A output). Do I need special tools for CT mounting?No, the split-core design allows for contact-free installation. Can I use CTs for DC current?No, only for AC; separate sensors are required for DC. Which app supports Shelly accessories?Shelly app, Home Assistant, Domoticz – MQTT-based. Are accessories weather-resistant?Indoor CTs yes, special enclosures are needed for outdoor use. Some of the information in this article is from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

The Shelly Pro 3 EM is a three-phase energy meter that precisely measures power consumption, PV feed-in, and energy flows. With 120 A per channel, Wi-Fi, Ethernet, MQTT, Modbus TCP, and cloud integration, it offers maximum control and transparency for households, commercial businesses, and industrial facilities. In combination with DRBO Greenenergy SunLit storage systems, it optimizes self-consumption, load management, and real-time energy monitoring. How does the Shelly Pro 3 EM work? The Shelly Pro 3 EM measures electrical power across three phases using external current clamps. Voltage, current, frequency, power factor, instantaneous power, as well as total consumption and feed-in are recorded. Data is transmitted in real time via LAN, Wi-Fi, or local interfaces to apps, the cloud, or energy management systems – ideal for DRBO Greenenergy installations. What are the electrical specifications of the Shelly Pro 3 EM? Parameter Specification Number of phases 3 phases Max. current (per channel) 120 A (CT) Rated voltage 230 V ±10% single-phase / 400 V three-phase Measurement accuracy class < 1% Frequency range 50 / 60 Hz Power measurement active, reactive, apparent power Energy metering Consumption & feed-in separately Operating temperature –20 °C to +40 °C Enclosure DIN rail mounting, 4 TE The Pro series is designed for permanent installation in distribution boards. What communication options does the Shelly Pro 3 EM support? It offers Wi-Fi 2.4 GHz, Ethernet, Bluetooth BLE, MQTT, Modbus TCP, and REST API/CoAP. This allows the meter to be flexibly integrated into smart home systems, industrial facilities, and energy management solutions such as DRBO Greenenergy SunLit. What are the key measurement functions of the Shelly Pro 3 EM? Active and reactive energy per phase Instantaneous power (W, VAR, VA) Voltage and current values per phase Total energy feed-in for PV systems Power factor and grid frequency This data enables precise load control, PV monitoring, and storage optimization. What safety and reliability features does the device offer? Housing made of flame-retardant plastic Protection against overvoltage, overheating, and short circuits Internal voltage isolation EN IEC 61010-1 compliance DRBO Greenenergy particularly recommends the Pro 3 EM for commercial businesses, PV systems, and storage integration. What are the installation requirements for the Shelly Pro 3 EM? Mounting on a DIN rail (4 TE) with external current transformers (120 A). Configuration via Shelly Cloud, local IP, or Bluetooth app. For professional monitoring, a stable LAN connection is recommended, especially in combination with DRBO Greenenergy SunLit storage systems. What data and storage functions are available? Internal memory: up to 1 year of historical values Cloud & App: Live and historical views Export: JSON / CSV / Modbus TCP Data security: HTTPS encryption, local storage possible This makes integration into energy management systems like DRBO Greenenergy EMS straightforward. DRBO Greenenergy Expert Opinions "The Shelly Pro 3 EM offers three-phase measurement for precise energy monitoring. In conjunction with SunLit storage systems, it provides real-time data for efficient load management, PV monitoring, and self-consumption optimization. This gives customers full transparency and control over their energy profile."— DRBO Greenenergy Engineering Team What protocols and integrations are available? Protocol Application MQTT Cloud-free IoT communication Modbus TCP/IP Industrial integration REST API / CoAP Direct developer access Shelly Cloud & App Remote control & history These standards facilitate integration into building management and PV monitoring. What are the possible applications for the Shelly Pro 3 EM? Private households: consumption analysis, cost control Commercial businesses: load management, energy efficiency PV systems: real-time feed-in Storage solutions: charge cycle control (SunLit) Smart Buildings: Modbus or MQTT integration At DRBO Greenenergy, it is often used as part of a complete energy management package. How precisely does the Shelly Pro 3 EM measure energy flows? Accuracy < 1%, even with asymmetrical three-phase systems. 120 A CTs enable precise measurement of high loads, ideal for PV, heat pumps, or commercial installations. Why is the Shelly Pro 3 EM ideal for PV and energy storage applications? Its three-phase capability and diverse protocols allow for optimal combination with PV inverters and storage solutions such as DRBO Greenenergy SunLit storage systems. Consumption and back-feed are recorded, enabling efficient control of self-consumption and load management. Conclusion: Precision and Flexibility for Energy Professionals The Shelly Pro 3 EM is a universal, precise energy meter for households, commercial businesses, and industrial facilities. In combination with DRBO Greenenergy SunLit storage solutions, it creates a fully integrated energy management system with real-time data, optimal load management, and high reliability. Frequently Asked Questions (FAQs) 1. Does the Shelly Pro 3 EM measure bidirectionally?Yes, consumption and feed-in are recorded separately for each phase. 2. Can I use the meter without the cloud?Yes, it can be operated completely offline via MQTT, Modbus, or local API. 3. Which current transformers are compatible?Standard CT sensors up to 120 A, 0.333 V output. 4. Is the Pro 3 EM suitable for photovoltaics?Yes, perfect for PV feed-in, self-consumption, and storage control. 5. Does the meter support firmware updates?Yes, OTA updates ensure long-term software stability. Some of the information in this article is sourced from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

The Shelly Pro 3 EM differs from the Shelly Pro EM primarily in its support for three phases, higher measurement accuracy, and additional communication interfaces. Both devices are used for precise energy monitoring, but the Pro 3 EM is aimed at professional multi-phase installations, ideal for house connections, PV systems, and commercial applications, while the Pro EM covers compact single-phase solutions. What is the main difference between Shelly Pro EM and Shelly Pro 3 EM? The crucial difference lies in the number of phases: Shelly Pro EM measures energy on one phase (1-phase). Shelly Pro 3 EM monitors three phases simultaneously (3-phase). Thus, the Pro 3 EM is suitable for complex installations, while the Pro EM is ideal for single circuits. Feature Shelly Pro EM Shelly Pro 3 EM Phases 1 3 Current Sensors 3 Channels (single-phase) 3 Channels (three-phase) Max. Current per Channel 120 A 120 A Accuracy ±1% ±0.5% Communication Ethernet, WLAN Ethernet, WLAN, RS485 Application Residential, single-phase House connection, commercial installation How do the measurement functions and accuracy levels differ? The Shelly Pro 3 EM offers higher precision with ±0.5%, while the Pro EM achieves ±1%. Both measure voltage, current, active, apparent, and reactive power, which is crucial for precise consumption analysis in PV or smart home systems. What are the hardware and communication differences? Both devices have WLAN and Ethernet, the Pro 3 EM additionally offers RS485 support for stable data transmission in larger networks. The Pro EM is more compact, ideal for individual projects or balcony power plants. Interface Pro EM Pro 3 EM Benefit WLAN ✔ ✔ Wireless configuration Ethernet ✔ ✔ Stable connection RS485 ✖ ✔ Industrial standard communication Cloud/App ✔ ✔ Remote control What role do current sensors (CT clamps) play? Both models use Current Transformers (CT clamps) for non-contact current measurement. Pro EM: 50–120 A for single-phase lines Pro 3 EM: three CTs simultaneously, one per phase, for complete grid analysis CTs with high current carrying capacity are particularly relevant for large consumers or PV feed-in points. How do mounting and installation effort differ? Both devices are DIN rail compatible. Installation of the Pro 3 EM takes a little longer because three phases must be wired correctly. The Pro EM can be installed faster – ideal for single-phase balcony power plants. DRBO Greenenergy recommends the Pro 3 EM for three-phase PV or house installations for precise monitoring. Why is the Shelly Pro 3 EM better suited for photovoltaic systems? The Pro 3 EM detects energy flows in all three phases, including feed-in and consumption. This enables intelligent energy management, especially in combination with storage units like SunLit from DRBO Greenenergy. Advantages in PV operation: Simultaneous measurement of generation and feed-in Phase-based energy optimization Real-time monitoring via web interface or app Compatible with inverters via Modbus What are the integration options in smart home systems? Both devices support MQTT, Modbus-TCP/IP, REST API and are compatible with systems such as Home Assistant or ioBroker. The Pro 3 EM with RS485 offers additional integration into professional energy management systems from DRBO Greenenergy for precise load and grid management. When is the Shelly Pro EM the better choice? For monitoring individual circuits such as washing machines, electric heaters, or wallboxes, the Pro EM is sufficient. Compact, cost-effective, and ideal for DIY projects, it is often used by DRBO Greenenergy in balcony power plants or small home energy systems. DRBO Greenenergy Expert Opinions "For single-phase power supply, the Shelly Pro EM is sufficient. Those who integrate PV systems, storage units, or heat pumps benefit from the Shelly Pro 3 EM. It precisely records where energy is generated, stored, or consumed - the basis for efficient energy management with SunLit systems."— DRBO Greenenergy Technical Team What is the price difference between Shelly Pro EM and Shelly Pro 3 EM? Pro EM: €80–€100 Pro 3 EM: €150–€170 The higher price results from multi-phase measurement, additional interfaces, and higher accuracy. For high energy demand, the investment is worthwhile due to more precise control and savings. Conclusion: Precision and Versatility Compared The Shelly Pro 3 EM is ideal for multi-phase systems, PV systems, and energy storage integration (e.g., DRBO Greenenergy SunLit storage). The Pro EM covers compact single-phase solutions. For professional installations, the Pro 3 EM is the first choice, for simple power analysis, the Pro EM is sufficient. Frequently Asked Questions 1. Does the Shelly Pro 3 EM support WLAN?Yes, both models feature WLAN and Ethernet. 2. Can the Pro 3 EM monitor PV inverters?Yes, it records generation and feed-in across three phases. 3. Is the Shelly Pro EM suitable for balcony power plants?Yes, ideal for single-phase plug-and-play systems. 4. How many CT clamps does the Pro 3 EM require?Three, one per phase, for complete current flow analysis. 5. Can Shelly data be integrated into energy management systems?Yes, via MQTT or Modbus into EMS from DRBO Greenenergy. Some of the information in this article is sourced from the internet. Product specifications are subject to change without notice. For the latest information, please visit the official website or product page.

The Shelly Pro 3 EM is a high-precision 3-phase energy meter with 1% accuracy, measuring power consumption, feed-in, and phase values. It offers LAN and cloud connectivity, MQTT support, integrated relay control, and DIN rail mounting. Ideal for homes, offices, or industry to optimize solar and storage systems like DRBO Greenenergy's SunLit, maximizing efficiency and cost savings. What is the Shelly Pro 3 EM and what is it used for? The Shelly Pro 3 EM is a compact 3-phase meter for DIN rails that precisely records consumption, power, and energy flows. It is suitable for private households, offices, and industrial facilities to monitor energy consumption, reduce costs, and optimize self-consumption from PV systems or storage units. DRBO Greenenergy recommends it for complementing balcony PV systems and SunLit storage units for precise data analysis. What measurement accuracy and ranges does the Shelly Pro 3 EM offer? The device provides a measurement accuracy of 1% for active energy, voltage, and current. Measurement ranges include up to 120 A per phase with integrated current transformers or external CTs, voltages up to 260 V per phase, and power up to 26 kW. Detailed readings: Active and reactive energy (kWh) Voltage (V), current (A), power (W) Power factor per phase This precision is particularly suitable for billing and optimizing systems such as bidirectional inverters. How does the 3-phase monitoring work with the Shelly Pro 3 EM? All three phases are monitored independently with separate inputs for current transformers and voltage. L1, L2, L3, as well as total values, are recorded, and phase imbalances are automatically detected. Advantages: Single-phase analysis Total consumption and generation Bidirectional measurement of consumption and feed-in Ideal for homes or businesses, supplemented by DRBO Greenenergy's energy management. What connectivity options does the Shelly Pro 3 EM have? The Shelly Pro 3 EM supports Wi-Fi (2.4 GHz), Bluetooth, and LAN for stable connections. Cloud integration via the Shelly App, local MQTT/HTTP, and Modbus TCP interfaces allow for flexible control. Connectivity Comparison Shelly Pro 3 EM Option Protocol/Technology Advantage Wireless Wi-Fi, Bluetooth Easy installation Wired Ethernet (LAN) High stability, cloud-free Interfaces MQTT, HTTP, Modbus Open integration Does the Shelly Pro 3 EM have integrated relay functions? Yes, each phase has a 16 A relay with up to 3.6 kW switching capacity. Remote control of loads, emergency shutdown, or load management is possible. Functions: Single-phase control Schedules and scenarios via app Automatic shutdown in case of overload Optimal for dynamic energy management, e.g., in combination with SunLit storage units from DRBO Greenenergy. What storage and recording functions does the device offer? The Shelly Pro 3 EM stores data for up to 365 days locally at 1-minute intervals, with unlimited cloud storage and CSV export options. Advantages: Offline operation possible High resolution for analyses Automatic reports and diagrams Ideal for long-term consumption analysis in PV systems. How does the Shelly Pro 3 EM integrate into smart home systems? Integration into Home Assistant, openHAB, Jeedom and others via MQTT/HTTP. Support for Alexa, Google Home, and IFTTT via the cloud. Tips: MQTT publishing of all measured values Scenarios like "PV surplus → start charging" Compatible with Shelly ecosystem DRBO Greenenergy uses similar sensors for optimizing balcony electricity storage units. What installation options does the Shelly Pro 3 EM have? DIN rail 35 mm in the distribution board, plug-and-play terminals for current transformers and voltage. Installation: Quick installation without drilling Up to 120 A without external CTs IP54 enclosure for harsh environments Suitable for electricians; compatible with 3-phase households. Can the Shelly Pro 3 EM be combined with solar and storage systems? Yes, it precisely measures PV yield, self-consumption, and storage charging/discharging. Bidirectional measurement records feed-in to the grid or storage. Applications: Optimization of balcony power plants Load management with SunLit storage units from DRBO Greenenergy Automated switching in case of surplus Significantly increases the efficiency of decentralized systems. What safety and protection functions are integrated? Overcurrent, overvoltage, and temperature protection, relay overload shutdown, firmware updates, and TLS secured communication. Features: Automatic shutdown in case of errors Phase monitoring against imbalances Local operation without cloud dependence Reliable for critical applications. How do firmware and app functionality impact performance? The Shelly app provides dashboards, diagrams, schedules, and scenarios. Firmware updates continuously expand functions. Advantages: Mobile remote control Multi-device management Export and reports Ensures future-proofing. DRBO Greenenergy Expert Opinions "The Shelly Pro 3 EM is a key device for decentralized energy management systems. Its 1%-accurate 3-phase measurement provides the basis for optimal control of balcony PV, bidirectional inverters, and SunLit storage units. At DRBO Greenenergy, we recommend it to anyone who wants to maximize self-consumption and reduce costs – scalable, cloud-independent, and reliable." Conclusion: Is the Shelly Pro 3 EM the right choice for your energy management? The Shelly Pro 3 EM impresses with high precision, full 3-phase monitoring, flexible connectivity, and relay control. Ideal for homes, commercial establishments, or industries with PV systems. Combination with DRBO Greenenergy solutions maximizes efficiency. Installation, integration via MQTT, and consumption optimization bring quick, noticeable savings. Frequently Asked Questions (FAQs) 1. Does the Shelly Pro 3 EM measure bidirectionally?Yes, consumption and feed-in per phase are precisely recorded. 2. Does it need external current transformers?Integrated up to 120 A per phase; external CTs required above that. 3. Does it work without internet?Yes, local operation via LAN/MQTT, data can be stored for up to 1 year. 4. Is installation easy?For electricians: DIN rail, terminal connections, quick assembly. 5. Is it compatible with DRBO Greenenergy systems?Perfect for balcony PV and SunLit storage units for consumption optimization. Some of the information in this article is from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.

The market for balcony power plants is booming in Germany: Over 500,000 systems were installed by the end of 2025, generating around 1.5 billion kilowatt-hours of electricity. These systems noticeably reduce energy costs and promote the energy transition, but a lack of stability and installation problems hinder many users. The SunEnergyXT 3-in-1 (Full-Black) solar module mount solves these challenges with TÜV-certified versatility and easy installation. What challenges exist in the balcony solar industry? The balcony power plant market is growing rapidly, but a lack of standards creates uncertainty. According to Federal Network Agency registrations, installations increased by 300 percent in 2025, but 25 percent of users report installation errors due to unsuitable mounts. Wind loads up to 120 km/h and weather influences often lead to damage. Many tenants shy away from investments because traditional fasteners require drilling or are unstable. A study by the Fraunhofer Institute shows that 40 percent of systems suffer from less than 80 percent efficiency – due to incorrect tilt or vibrations. DRBO Greenenergy addresses this with robust solutions such as the SunEnergyXT mount. Lack of space on balconies exacerbates the problem: standard modules rarely fit optimally. Without flexible mounts, yields decrease by up to 30 percent. DRBO Greenenergy offers practical accessories for tenants and owners here. Why do traditional mounts fail? Traditional mounts are often rigid and material-dependent, such as plastic clamps or simple stands. They cannot withstand wind speeds above 80 km/h and tilt, which reduces yield. Costs of 20 to 50 euros per piece seem cheap, but repairs make them expensive. Drill-free alternatives such as tensioning straps loosen due to vibrations and do not meet certifications. In comparison, the SunEnergyXT mount requires no drilling but is more stable. DRBO Greenenergy recommends it as an upgrade for long-lasting systems. In addition, aesthetics are lacking: many bright white or silver models disturb the full-black design of modern modules. The 3-in-1 version fits seamlessly and increases the resale value of systems. What distinguishes the SunEnergyXT 3-in-1 (Full-Black) solar module mount? The MSH-01B mount made of aluminum alloy weighs 3.6 kg and measures 1340 x 90 x 70 mm – ideal for modules up to 2000 mm in length. It fits railings up to 6.5 cm wide and is suitable for balconies, terraces, flat roofs, and gardens. The tilt angle is adjustable from 5° to 40° for maximum solar radiation. TÜV-certified, it withstands wind loads up to 120 km/h and is full-black for a discreet look. One unit is needed per module; two for two-module systems. DRBO Greenenergy sells it for 49 euros – including instructions for plug-and-play installation. DRBO Greenenergy integrates it into complete sets with solar modules and storage units for efficient balcony power plants. What advantages does the SunEnergyXT mount offer in comparison? Criterion Traditional mount SunEnergyXT 3-in-1 (Full-Black) Certification None or incomplete TÜV-tested  Tilt angle Fixed (10-20°) Adjustable 5-40° Material & Weight Plastic, >4 kg Aluminum alloy, 3.6 kg Areas of use Balcony only Balcony, terrace, flat roof, garden Wind load Up to 80 km/h Up to 120 km/h Price per unit 20-50 € (short-lived) 49 € (durable) Installation Often drilling or straps Drill-free, 15 min. DRBO Greenenergy highlights the table through tests: 20 percent higher yield. How to install the SunEnergyXT solar module mount? Step 1: Check railing width (max. 6.5 cm) and module dimensions (up to 2000x1180x30 mm). Step 2: Attach the mount to the railing – close clamps without drilling. Step 3: Insert the module and set the tilt to 30° for south orientation. Step 4: Secure with screws (included); second mount for two-module setup. Step 5: Test stability and connect the system. Total duration: 15-30 minutes. DRBO Greenenergy offers video tutorials for tenants. Who benefits from the mount in which scenarios? Scenario 1: Tenants with small balconiesProblem: Unstable stands tip over in wind. Traditionally: Straps that break. After use: Secure 5° tilt, 15 percent more yield. Benefits: 150 € annual savings, no damage to property. Scenario 2: Owners with flat roofsProblem: No roof hooks possible. Traditionally: Heavy concrete stands. After use: Easy 3-in-1 installation, optimal 40°. Benefits: 25 percent efficiency increase, ROI in 2 years. Scenario 3: Self-employed working from homeProblem: High daily consumption, unreliable mount. Traditionally: Oversized system. After use: Balcony setup with storage, 50 percent of needs covered. Benefits: 400 € savings/year. Scenario 4: Garden owners with a terraceProblem: Uneven ground. Traditionally: Ground anchors. After use: Flexible railing fixation. Benefits: 800 kWh/year extra, maintenance-free. DRBO Greenenergy reports 4.6/5 Trustpilot ratings. Why is now the time to get into balcony solar? By 2030, 10 million balcony power plants are to be in operation to reduce CO2 emissions by 5 million tons. Subsidies such as the end of the EEG surcharge make self-generated electricity cheaper than grid electricity (€0.40/kWh). The SunEnergyXT mount ensures a long-term return of 20-30 percent. DRBO Greenenergy is driving the decentralized energy transition – with accessories for tenants and businesses. What are some frequently asked questions? Is the mount weather-resistant?Yes, the aluminum alloy withstands rain, snow, and UV radiation for 20+ years. Does it fit all solar modules?For framed modules up to 2000 mm; DRBO Greenenergy tests compatibility. Do I need tools for assembly?No, drill-free; only a screwdriver for fine securing. How much does it increase yield?Up to 25 percent through optimal tilt, depending on location. Where can I buy it?From DRBO Greenenergy – with complete sets and advice. Some of the information in this article is taken from the Internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.