1KOMMA5GRAD Home Assistant Integration

This is a HACS integration for Home Assistant to integrate 1KOMMA5GRAD into your Home Assistant instance.

This integration is not related to 1KOMMA5GRAD and not officially supported by them.

Installation

Limited availability

This integration is for the latest 1KOMMA5GRAD Heartbeat API.

Warning: The new API is not available for all regions yet. The new API is required to use this integration with Home Assistant.

To check if you are using the latest generation of the Heartbeat API, please try login on https://app.1komma5grad.com/.

Currently supported regions for the new API are (as of December 2025):

• Austria
• Germany
• Netherlands
• Sweden
• Switzerland

You can check this also by going to https://gaia-charge.github.io/app-not-available/ and enter 6455889609 as App ID. This checks if the latest iOS App is available in your region, which also uses the new API.

If you are still using https://my.1komma5.io/ for login (or the old App), you are still using the old API and please use this https://github.com/derlangemarkus/1komma5grad_ha to integrate 1KOMMA5GRAD into Home Assistant instead.

Entities

The integration creates the following entities per system:

Sensors

Entity	Description
Electricity Price	Current electricity price (incl. grid costs and VAT). Includes forecast attributes (see below).
Grid Feed In Power	Power currently imported from the grid (W)
Grid Feed Out Power	Power currently exported to the grid (W)
Grid Feed Power	Net grid power flow (W)
Consumption Power	Total household consumption (W)
Solar Production Power	Current solar panel output (W)
EV Chargers Aggregated Power	Combined power of all EV chargers (W)
Heat Pumps Aggregated Power	Combined power of all heat pumps (W)
Battery State of Charge	Battery charge level (%)
Battery In Power	Power flowing into the battery (W)
Battery Out Power	Power flowing out of the battery (W)

Energy sensors (kWh) are also created for grid in/out, solar production, EV chargers, heat pumps, and battery in/out to enable the HA Energy Dashboard.

Switches

Entity	Description
Heartbeat Automatic Mode	Toggle the Energy Management System (EMS) automatic mode on/off

Select

Entity	Description
EV Charging Mode	Select charging mode per EV (e.g. SMART_CHARGE, SOLAR_CHARGE, QUICK_CHARGE)

Number

Entity	Description
EV Current State of Charge	Current EV battery charge level (0-100%). Can be set manually.

Electricity Price Forecast

The electricity price sensor exposes future hourly prices as extra state attributes. This allows you to build automations based on upcoming prices (e.g. run appliances during the cheapest hours).

Prices for the current day are always available. Next-day prices are typically published around 14:00 CET.

Available attributes

Attribute	Description
forecast	List of future hourly prices as {datetime, price} objects
price_today_min	Lowest price of the current day
price_today_max	Highest price of the current day
price_today_avg	Average price of the current day
cheapest_upcoming_hour	ISO datetime of the cheapest future hour
cheapest_upcoming_price	Price at the cheapest future hour
forecast_hours_available	Number of future hours available (indicates if next-day prices are published)

Template examples

You can use these in Developer Tools > Templates or in automations:

# Current price
{{ states('sensor.electricity_price_YOUR_SYSTEM_ID') }}

# Forecast list
{{ state_attr('sensor.electricity_price_YOUR_SYSTEM_ID', 'forecast') }}

# Cheapest upcoming hour
{{ state_attr('sensor.electricity_price_YOUR_SYSTEM_ID', 'cheapest_upcoming_hour') }}

# Average price today
{{ state_attr('sensor.electricity_price_YOUR_SYSTEM_ID', 'price_today_avg') }}

Automation example

Start a device when the cheapest upcoming hour begins:

alias: "Run dishwasher at cheapest hour"
trigger:
  - platform: template
    value_template: >
      {{ now().isoformat()[:13] ==
         state_attr('sensor.electricity_price_YOUR_SYSTEM_ID', 'cheapest_upcoming_hour')[:13] }}
action:
  - service: switch.turn_on
    target:
      entity_id: switch.dishwasher

Sync EV SoC to EV Charger

If your EV integration exposes a battery level sensor (e.g. Tesla, Hyundai/Kia, BMW, or any other), you can sync the EV's state of charge to the EV charger so it always has an accurate SoC for smart charging decisions. The example below uses Tesla, but simply replace the sensor entity with your EV's battery level sensor:

alias: Sync EV SoC to 1KOMMA5GRAD EV Charger
description: ""
triggers:
  - entity_id: sensor.my_tesla_battery_level
    trigger: state
conditions:
  - condition: template
    value_template: |
      {{ states('sensor.my_tesla_battery_level') | int(0) > 0 and
         states('sensor.my_tesla_battery_level') | int(0) != states('number.ev_current_state_of_charge_YOUR_SYSTEM_ID') | int(0)
      }}
actions:
  - target:
      entity_id: number.ev_current_state_of_charge_YOUR_SYSTEM_ID
    data:
      value: "{{ states('sensor.my_tesla_battery_level') | int(0) }}"
    action: number.set_value
  - delay: "00:10:00"
mode: single

Replace sensor.my_tesla_battery_level with your EV's battery level sensor entity and number.ev_current_state_of_charge_YOUR_SYSTEM_ID with your EV charger SoC entity.

Warning

This integration is fully community driven and not officially supported by 1KOMMA5GRAD. Use at your own risk. We are not responsible for any damage or issues caused by using this integration.

This integration is not affiliated with or endorsed by 1KOMMA5GRAD.

This integration is regularly tested against the following Heartbeat components:

• Chint DTSU666 (Power Meter)
• Mennekes Amtron Compact 2.0S (EV Charger)

Other components like heat pumps are not tested due to lack of hardware availability.

Contribute

If you want to contribute to this project, please have a look at the CONTRIBUTE.md file.