SOFAR Inverter + LSW-3

Small utility to read data from SOFAR K-TLX inverters through the Solarman (LSW-3) datalogger. Tested with logger S/N 17xxxxxxx and 21xxxxxxx (protocol V5). Requires python3 to run.

REMARK: To make it work with other inverter brand/model connected via LSW-3 you need to alter the .xml file accordingly and change pini and pfin values in the InverterData.py to point the register's position start/end.

Thanks to @jlopez77 https://github.com/jlopez77 for a big part of the code.

Configuration

Edit the config.cfg and enter the following data:

[SofarInverter]
inverter_ip=X.X.X.X             # data logger IP
inverter_port=8899              # data logger port
inverter_sn=XXXXXXXXXX          # data logger S/N
mqtt=1                          # set to 1 for MQTT output, 0 for JSON output.
mqtt_server=192.168.X.X
mqtt_port=1883
mqtt_topic=XXXXXXXXXXXX
mqtt_username=
mqtt_passwd=
lang=                           # Output language (available: PL,EN)
prometheus=0                    # set to 1 to export data in Prometheus metrics format
prometheus_file=/xx/xx/metrics/index.html  # Path to Prometheus metrics file served by web server
influxdb=0                      # set to 1 to export data to InfluxDB
influxdb_host=                  # InfluxDB host (i.e. 127.0.0.1)
influxdb_port=8086              # InfluxDB port
influxdb_user=                  # InfluxDB user with permisions to read/write from/to dbname
influxdb_password=              # User password
influxdb_dbname=                # Database name 
verbose=0                       # Set to 1 for additional info to be presented (registers, binary packets etc.)

File SOFARMap.xml contains MODBUS inverter's registers mapping for Sofar Solar K-TLX product line
and Prometheus metrics configuration.
Edit i.e. to get different language, other Prometheus/InfluxDB metrics names or
if Your inverter has different register's numbers.
SOFARMap.xml structure and fields definition:
"directory": "solar",               # Id
    "items": [
      {
        "titleEN": "PV1 Power",     # English JSON output name 
        "titlePL": "Moc PV1",       # Polish JSON output name
        "registers": ["0x000A"],    # Inverter's register address
        "parserRule": 1,            # Currently unused
        "optionRanges": [],         # For numeric value to text label mappings
        "ratio": 10,                # Value ratio
        "unit": "W",                # Value unit
        "graph": 1,                 # Set to 1, to export value to Prometheus/InfluxDB
        "metric_type": "gauge",     # Prometheus metric type
        "metric_name": "SolarPower",# Prometheus/InfluxDB name
        "label_name": "Power",      # Prometheus/InfluxDB label name
        "label_value": "PV1"        # Prometheus/InfluxDB value name
      }

Run

bash:/python3 InverterData.py  (or ./InverterData.py)
{
    "Inverter status": "Normal",
    "Fault 1": 0,
    "Fault 2": 0,
    "Fault 3": 0,
    "Fault 4": 0,
    "Fault 5": 0,
    "PV1 Voltage (V)": 403.7,
    "PV1 Current (A)": 0.14,
    "PV2 Voltage (V)": 78.9,
    "PV2 Current (A)": 0.0,
    "PV1 Power (W)": 50,
    "PV2 Power (W)": 0,
    "Output active power (W)": 20,
    "Output reactive power (kVar)": -0.65,
    "Grid frequency (Hz)": 49.98,
    "L1 Voltage (V)": 241.8,
    "L1 Current (A)": 0.93,
    "L2 Voltage (V)": 240.4,
    "L2 Current (A)": 0.91,
    "L3 Voltage (V)": 240.4,
    "L3 Current (A)": 0.93,
    "Total production (kWh)": 297,
    "Total generation time (h)": 249,
    "Today production (kWh)": 14010.0,
    "Today generation time (min)": 679,
    "Inverter module temperature (ºC)": 29,
    "Inverter inner termperature (ºC)": 45,
    "Inverter bus voltage (V)": 655.8,
    "PV1 voltage sample by slave CPU (V)": 402.6,
    "PV1 current sample by slave CPU (A)": 79.1,
    "Countdown time (s)": 60,
    "Inverter alert message": 0,
    "Input mode": 1,
    "Communication Board inner message": 0,
    "Insulation of PV1+ to ground": 1379,
    "Insulation of PV2+ to ground": 2387,
    "Insulation of PV- to ground": 1917,
    "Country": "Poland",
    "String 1 voltage (V)": 9.3,
    "String 1 current (A)": 24.04,
    "String 2 voltage (V)": 9.1,
    "String 2 current (A)": 24.04,
    "String 3 voltage (V)": 9.3,
    "String 3 current (A)": 0.0,
    "String 4 voltage (V)": 29.7,
    "String 4 current (A)": 0.0,
    "String 5 voltage (V)": 24.9,
    "String 5 current (A)": 14.01,
    "String 6 voltage (V)": 67.9,
    "String 6 current (A)": 0.29,
    "String 7 voltage (V)": 4.5,
    "String 7 current (A)": 65.58,
    "String 8 voltage (V)": 402.6,
    "String 8 current (A)": 7.91
}

Known Issues

You tell me :)

Contrib

Feel free to suggest, rewrite or add whatever you feel is necessary.

Home Assistant support (by jlopez77)

MQTT support into Home Assistant:

  - platform: mqtt
    name: "SofarInverter"
    state_topic: "mqtt_topic"
    unit_of_measurement: "W"
    json_attributes_topic: "mqtt_topic/attributes"

Prometheus+Grafana support

Steps to run Prometheus+Grafana support:
    1. Configure prometheus options in config.cfg
    2. Serve prometheus metrics file using any web server (name it index.html to be the default page in configured path)
    3. Configure prometheus target to access the file 
    4. Add Prometheus datasource in Grafana
    5. Import grafana_en/pl.json file (Dashboards->Manage->Import).
    Enjoy :)

InfluxDB+Grafana support

Steps to run InfluxDB+Grafana support:
    1. Configure InfluxDB options in config.cfg
    2. Create database to store inverter data in InfluxDB (i.e. create database Data)
    3. Add InfluxDB datasource in Grafana (name it InfluxDB)
    4. Import grafana_iflux_en/pl.json file (Dashboards->Manage->Import).
    Enjoy :)