SolarEdge Modbus TCP Poller (and MQTT publisher)

A Modbus poller for SolarEdge PV Solar Inverters.

Application flow

1. Poll data via Modbus TCP at regular interval (MODBUS_POLLINTERVAL)
2. Mapp the SunSpec data into a more user-friendly PVSolarReading structure.
3. Publish mapped data to the provided MQTT broker (MQTT_URI) & topic (MQTT_TOPIC).

Usage

Environment variables available:

MODBUS_HOSTNAME=192.168.0.100
MODBUS_PORT=1502
MODBUS_SLAVEID=1
MODBUS_POLLINTERVAL=5000
LOG_LEVEL=INFO
MQTT_URI=tcp://iot.eclipse.org:1883
MQTT_USERNAME=modbuspublisher
MQTT_PASSWORD=h4ck3rPassw0rd
MQTT_TOPIC=pvsolar/7E16A12F
MQTT_QOS=1

Sample MQTT data

{
    "MeterId": "7E16A12F",
    "AC_Voltage_L1_N": 229,
    "AC_Voltage_L2_N": 238.2,
    "AC_Voltage_L3_N": 238,
    "AC_Power": 8482,
    "AC_Frequency": 50.07,
    "AC_VA": 8493,
    "AC_VAR": -516.27,
    "AC_PF": -99.809,
    "AC_Energy_WH": 15445719,
    "DC_Current": 11.08,
    "DC_Voltage": 776.53,
    "DC_Power": 8614,
    "Temp_Sink": 52.29,
    "InverterStatus": 5,
    "time": 1621811112386
}

LaunchDaemons example (macOS)

# cat /Library/LaunchDaemons/com.stefannilssonconsulting.solaredgedc-A1B2C3D4.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>KeepAlive</key>
    <true/>
    <key>Label</key>
    <string>com.stefannilssonconsulting.solaredgedc</string>
<key>EnvironmentVariables</key>
<dict>
<key>MODBUS_HOSTNAME</key><string>192.168.0.5</string>
<key>MODBUS_PORT</key><string>1502</string>
<key>MODBUS_SLAVEID</key><string>1</string>
<key>MODBUS_POLLINTERVAL</key><string>5000</string>
<key>LOG_LEVEL</key><string>INFO</string>
<key>MQTT_URI</key><string>tcp://my.mqtt.endpoint:1883</string>
<key>MQTT_USERNAME</key><string>myuser</string>
<key>MQTT_PASSWORD</key><string>mypassword</string>
<key>MQTT_TOPIC</key><string>sensors/energy/solar/A1B2C3D4</string>
<key>MQTT_QOS</key><string>1</string>
</dict>
    <key>ProgramArguments</key>
    <array>
    <string>/path/to/binary/solaredgedc</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
    <key>StandardOutPath</key>
    <string>/Library/Logs/solaredge_out.log</string>
    <key>StandardErrorPath</key>
    <string>/Library/Logs/solaredge_err.log</string>
</dict>
</plist>

License

MIT