The SMA Sunny Island Communication Unit SI-COMSMA-NR is an RS485 communication interface expansion kit for Sunny Island off-grid inverters, enabling integration with SMA Data Manager, Sunny Portal, and other monitoring systems. Product Description This retrofit communication module adds RS485 connectivity to Sunny Island inverters (3.0M to 8.0H series), allowing connection to external monitoring devices and cloud platforms. It supports Modbus RTU protocol for system status, performance data, and remote control functions. Key Features RS485 interface: Modbus RTU communication for third-party integration. Retrofit installation: Simple plug-in installation into Sunny Island inverters. Cloud connectivity: Enables data logging to Sunny Portal via Data Manager. Multi-device support: Daisy-chain multiple inverters and devices on RS485 bus. Robust design: Industrial-grade interface for harsh environments. Technical Details Communication protocol: Modbus RTU over RS485. Baud rates: 9600, 19200, 38400 bps (configurable). Bus topology: Half-duplex, up to 32 devices per segment. Termination: Built-in switchable termination resistor. Power supply: Powered from Sunny Island inverter. Connector: RJ45 for easy cabling. Physical Specifications Dimensions: Compact module fitting Sunny Island expansion slot. Mounting: Internal installation within inverter enclosure. Operating temperature: −25°C to +70°C (inverter-rated). Humidity: 5–95% non-condensing. LED indicators: Communication status and error codes. System & Application Notes Compatibility: Sunny Island 3.0M, 4.4M, 6.0H, 8.0H series inverters. Applications: Off-grid systems, hybrid PV-storage, multicluster configurations requiring monitoring. Integration: Connects to SMA Data Manager M, Sunny Home Manager, or third-party Modbus systems. Installation: Requires inverter firmware compatibility; professional installation recommended. Warranty: Covered by Sunny Island inverter warranty terms.
