Buderus Logamatic HMC 20

← Heating

For heatpumps with Luxtronik 2.1 controller. Uses Modbus TCP. Requires software v3.90.3 or later. Enable via SERVICE, Systemsteuerung, Konnektivität, Smart-Home-Interface.

Supported features

Dimmable: Power consumption can be reduced (e.g. §14a EnWG). See External Control.

Parameters

Name	Description	Value	Level
`id`	Modbus ID Default: `1`	int	required
`host`	IP address or hostname Example: `192.0.2.2`		required
`port`	Port Default: `502`	int	required
`timeout`	Timeout Default: `10s` Example: `10s`		optional
`heatoffset` [K]	Heating temperature boost Default: `0.0` Example: `2.0`		optional
`wwoffset` [K]	Hot water temperature boost Temperature boost offset for hot water. Possibly increases wear on compressor. Default: `0.0` Example: `8.5`		advanced

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: luxtronik

      # Modbus TCP
      modbus: tcpip
      id: 1
      host:  # Hostname
      port: 502 # Port
      timeout: 10s # Timeout, optional
      heatoffset: 0.0 # Heating temperature boost (K), optional
      wwoffset: 0.0 # Hot water temperature boost (K), Temperature boost offset for hot water. Possibly increases wear on compressor. (optional)