LG Therma V R290 Monobloc (SG Ready)

← Heating

Modbus connection to LG Therma V heat pump. Uses SG Ready energy states for intelligent control. Set the indoor unit in the installer settings > "Connectivity" > "Energy state" > "ESS use type" > to "Modbus". Since the internal power measurement shows too high values, an external power measurement is suggested. Factory setting Modbus (HEX) = 21 (33). Modbus registers can be found within the installation manual (address without the leading number and -1). Information on the energy state can be found within the installation manual. Energy states 6 and 7 can be adapted at the indoor unit in the installer settings > "Connectivity" > "Energy state" >"Energy state definition". If the internal power measurement does not work (not all models support this register), please set energy metering to "false".

Parameters

Modbus

Name	Description	Value	Level
`id`	Modbus ID Default: `1`	int	required
`device`	Device name USB-RS485 adapter Example: `/dev/ttyUSB0`		required
`baudrate`	Baudrate Default: `9600`		required
`comset`	ComSet Communication parameter for the adapter Default: `8N1`		required
`host`	IP address or hostname Example: `192.0.2.2`		required
`port`	Port Default: `502`	int	required
`tempsource`	DHW warm water tank or inlet flow temperature Default: `water_tank`		optional
`energystate`	SGReady states or modifyable energy state 6 and 7 Default: `SGReady`		optional
`haspower`	Internal energy metering Default: `true`		optional

Configuration example for evcc.yaml

If you don't want to configure via the UI, you can alternatively use this YAML block.

chargers:
    - name: my_heating
      type: template
      template: lg-therma

      # RS485 via adapter (Modbus RTU)
      modbus: rs485serial
      id: 33
      device: /dev/ttyUSB0 # USB-RS485 Adapter Adresse
      baudrate: 9600 # Prüfe die Geräteeinstellungen, typische Werte sind 9600, 19200, 38400, 57600, 115200
      comset: "8N1" # Kommunikationsparameter für den Adapter

      # RS485 via TCP/IP (Modbus RTU)
      modbus: rs485tcpip
      id: 33
      host:  # Hostname
      port: 502 # Port
      tempsource: water_tank # DHW warm water tank or inlet flow temperature, [water_tank, water_inlet]
      energystate: SGReady # SGReady states or modifyable energy state 6 and 7, [SGReady, IndividualEnergystate]
      haspower: true # Internal energy metering