APsystems ECU-R: High-Performance ZigBee Gateway for Residential Monitoring The APsystems ECU-R is the information backbone of your solar array. As the primary communication hub for APsystems microinverters, the ECU-R collects individual module performance data and transmits it to the EMA (Energy Monitoring & Analysis) platform in real time. This allows you to track the exact energy production of every single panel on your roof from any web-connected device. Engineered for stability, the ECU-R uses 2.4GHz ZigBee wireless communication to talk to your microinverters. Unlike standard WiFi-based MLPE, ZigBee provides a more robust, encrypted link that easily penetrates roofing materials, ensuring you never lose data even in complex residential layouts. With its compact design and integrated WiFi, the ECU-R offers the most flexible network integration on the market. Search Summary: ZigBee 2.4GHz Communication | Supports up to 100 Microinverters | Compatible with DS3, QS1, YC600, and YC1000 | Built-in WiFi & Ethernet | Real-Time EMA App Monitoring | Small Form Factor. Key Features & System Advantages: Module-Level Monitoring: View the precise AC output and historical performance of every individual PV module for proactive maintenance and troubleshooting. Wide Compatibility: Fully supports the latest DS3-S, DS3-L, and DS3 dual-microinverters, as well as legacy QS1 and YC600 units. Stable ZigBee Mesh: Provides superior range and reliability compared to Powerline (PLC) or standard WiFi communication methods. Easy Commissioning: Use the ECU App on your smartphone to scan microinverter IDs and complete system setup in minutes via a local wireless hotspot. No Power Limit Functionality: As the "R" (Residential) model, it is optimized for standard grid-tie systems that do not require complex export limiting or CT clamps. Technical Specifications: Communication to Inverter ZigBee 2.4 GHz (Encrypted) Max. Inverters Supported Up to 100 Units Network Connectivity WiFi 802.11g/n or RJ45 Ethernet Power Consumption 1.7 Watts (Ultra-Efficient) Operating Temp -20°C to +65°C