Peak and off-peak energy tariffs

Powercalc does not yet have native fields for separate fixed peak and offpeak prices. You can provide the same behavior with a Home Assistant template sensor that reports the price for the tariff which is currently active. Powercalc then uses that template sensor as its dynamic energy price.

Price based on a weekly schedule

First create a Schedule helper named Peak tariff under Settings > Devices & services > Helpers. Add time blocks for all periods in which the peak price applies. The resulting schedule.peak_tariff entity is on during those blocks and off outside them.

Next, add this template sensor to configuration.yaml, replacing the example prices and currency with your own:

template:
  - sensor:
      - name: Current energy price
        unique_id: current_energy_price
        unit_of_measurement: "EUR/kWh"
        state: >
          {{ 0.25043 if is_state('schedule.peak_tariff', 'on') else 0.24828 }}

The template sensor updates automatically when the schedule changes state; no automation is needed. After reloading the Template integration or restarting Home Assistant, configure the new sensor as Powercalc's price sensor:

powercalc:
  energy_price_sensor: sensor.current_energy_price
  create_cost_sensors: true

When using the GUI, select sensor.current_energy_price under Cost options > Energy price sensor instead.

Price based on an existing tariff indicator

Some meters or integrations already expose the currently active tariff. When you also have separate price sensors for both tariffs, combine them into one current-price sensor. For example, if state 2 means peak tariff:

template:
  - sensor:
      - name: Current energy price
        unique_id: current_energy_price
        unit_of_measurement: "EUR/kWh"
        availability: >
          {{ is_number(states('sensor.peak_energy_price'))
             and is_number(states('sensor.offpeak_energy_price')) }}
        state: >
          {% if is_state('sensor.current_tariff', '2') %}
            {{ states('sensor.peak_energy_price') }}
          {% else %}
            {{ states('sensor.offpeak_energy_price') }}
          {% endif %}

Replace the entity ids and tariff state with those used by your integration, then configure sensor.current_energy_price in Powercalc as shown above.

Whenever the template sensor changes price, Powercalc first charges the energy consumed up to that moment at the previous price. Energy consumed afterwards is charged at the new price, so the accumulated cost remains correct across tariff changes.