n8n-nodes-huaweisolar

N8N community nodes for reading data from Huawei SmartLogger 3000 and SUN2000 inverters via Modbus TCP protocol.

Features

• 🔌 Direct Modbus TCP communication with Huawei SmartLogger 3000
• ⚡ Fast parallel device discovery with configurable timeouts
• 📊 Comprehensive data reading including power, environmental, system, and alarm data
• 🔧 Critical Huawei-specific fixes applied (little-endian byte order, correct unit IDs)
• 🚀 Optimized performance with connection management and retry logic

Installation

Install this node in your N8N instance:

npm install n8n-nodes-huaweisolar

Or if using the N8N desktop app, install through the Community Nodes section.

Available Nodes

SmartLogger

Reads data from Huawei SmartLogger 3000 devices.

Operations

1. Read Data - Read selected data categories (system, power, environmental, alarms)
2. Discover Devices - Scan for all connected devices on the Modbus network

SUN2000 Inverter

Reads data from individual Huawei SUN2000 inverters.

Operations

1. Read Inverter Data - Read data from manually specified inverter addresses
2. Read From Discovery - Read data from inverters discovered by SmartLogger node

SmartLogger Configuration

• Host: IP address of the SmartLogger (e.g., 192.168.1.10)
• Port: Modbus TCP port (default: 502)
• Unit ID: SmartLogger Modbus unit ID (default: 3 - not 0 as documented!)
• Connection Timeout: Timeout in milliseconds (default: 5000)
• Retry Attempts: Number of retry attempts on failure (default: 3)

SmartLogger Discovery Options

• Discovery Range: Unit IDs to scan (default: 1-247)
• Discovery Timeout: Shorter timeout for discovery operations (default: 2000ms)
• Parallel Scan Count: Number of simultaneous scans (default: 10)

SUN2000 Configuration

• Data Categories: Select power, status, and/or fault data
• Discovery Input Source: Use SmartLogger discovery output or manual configuration
• Filter Inverters Only: Whether to only read SUN2000 devices from discovery
• Inverter Addresses: Manual list of inverter addresses (when not using discovery)

Example Output

SmartLogger Power Data

{
  "power": {
    "dcCurrentTotal": 125.6,
    "inputPowerTotal": 87.3,
    "co2Reduction": 45234.5,
    "activePowerTotal": 85.2,
    "reactivePowerTotal": 12.5,
    "powerFactor": 0.985,
    "plantStatus": "Unlimited",
    "totalEnergy": 524312.5,
    "dailyEnergy": 312.7
  }
}

SmartLogger Device Discovery

{
  "allDevices": [
    {
      "unitId": 3,
      "deviceName": "SmartLogger 3000A",
      "connectionStatus": "Online",
      "portNumber": 1,
      "deviceAddress": 3
    },
    {
      "unitId": 12,
      "deviceName": "100KTL-M2(COM3-12)",
      "connectionStatus": "Online",
      "portNumber": 3,
      "deviceAddress": 12
    }
  ]
}

SUN2000 Inverter Data

{
  "inverters": [
    {
      "unitId": 12,
      "deviceName": "100KTL-M2(COM3-12)",
      "activePower": 85.2,
      "reactivePower": 12.1,
      "dcCurrent": 125.6,
      "inputPower": 87.3,
      "powerFactor": 0.985,
      "status": 49152,
      "connectionStatus": "Status: 0xC000",
      "cabinetTemperature": 45.2,
      "insulationResistance": 1250.5
    }
  ]
}

Important Notes

Critical Huawei-Specific Fixes Applied

1. Little-Endian Byte Order: Despite documentation claiming big-endian, Huawei devices use little-endian
2. SmartLogger Unit ID: Use unit ID 3 (not 0 as documented)
3. Gain Factors: All proper gain factors are applied automatically

Known Compatible Devices

• Huawei SmartLogger 3000/3000A
• Huawei SUN2000 series inverters (100KTL-M2, etc.)
• Environmental monitoring devices connected to SmartLogger

Troubleshooting

Discovery Taking Too Long?

• Reduce the discovery range (e.g., 3,12-15 instead of 1-247)
• Increase parallel scan count (try 20 for faster scanning)
• Decrease discovery timeout (try 1000ms if network is reliable)

Getting Wrong Device Names?

• Update to version 0.0.3 or later which fixes unit ID conflicts
• Ensure only one N8N instance is accessing the device at a time

Connection Failed?

• Verify SmartLogger IP address is correct
• Check firewall allows port 502
• Try unit ID 3 (not 0 or 1)
• Increase connection timeout if network is slow

Version History

• 0.0.5 - Added SUN2000 Inverter node with discovery integration
• 0.0.4 - Simplified SmartLogger UI with checkbox data selection, added CO2 reduction and Xinjiang status
• 0.0.3 - Fixed parallel discovery unit ID conflicts
• 0.0.2 - Added parallel discovery, removed redundant inverter section
• 0.0.1 - Initial release with SmartLogger node

Contributing

Issues and pull requests are welcome on GitHub.

License

MIT

Credits

Based on working Python implementation with critical fixes for Huawei's non-standard Modbus implementation.