Poland, Tauron

[KrzysztofHajdamowicz]

1. Configure EUR-PLN exchange rate sensor:

sensors:
- platform: rest
  unique_id: nbp_api-eurpln
  device_class: monetary
  name: EUR to PLN Exchange Rate
  resource: https://api.nbp.pl/api/exchangerates/rates/A/EUR/?format=json
  method: GET
  headers:
    Accept: application/json
  value_template: "{{ value_json.rates[0].mid }}"
  unit_of_measurement: "PLN"
  scan_interval: 86400 # Update once a day

2. Create input_numbers for peak and off-peak distribution rates (For example, Tauron in G12W
   uses: 0,36898 PLN/kWh as peak and 0,09028 PLN/kWh off-peak during 2024H2)
3. Create input_number for comission that Tauron takes for access for dynamic tariffs (~0,11 PLN/kWh if I remember correctly)
4. Use this price modifyer template:

{% set s = {
    "exchange_rate": states('sensor.eur_to_pln_exchange_rate')|float,
    "VAT": 1.23,
    "peak_distribution_rate": states('input_number.dystrybucja_g12w_szczyt')|float,
    "offpeak_distribution_rate": states('input_number.dystrybucja_g12w_pozaszczyt')|float,
    "market_access_fee": states('input_number.tauron_taryfa_dynamiczna_prowizja')|float
} %}

{# Define peak periods for G12W tariff as a list of tuples (start_hour, stop_hour) #}
{% set peaks = [(6, 13), (15, 22)] %}

{# Determine if it's a weekend (offpeak all day) #}
{% set is_weekend = now().weekday() >= 5 %}

{# Check if the current time falls within any peak period #}
{% set is_peak = False %}
{% if not is_weekend %}
    {% for peak in peaks %}
        {% if now().hour >= peak[0] and now().hour < peak[1] %}
            {% set is_peak = True %}
        {% endif %}
    {% endfor %}
{% endif %}

{# Set distribution rate based on peak or offpeak time #}
{% set distribution_rate = s.peak_distribution_rate if is_peak else s.offpeak_distribution_rate %}

{# Final price calculation: convert current_price to PLN, add distribution rate, market access fee, and apply VAT #}
{{ ((current_price * s.exchange_rate) + distribution_rate + s.market_access_fee) * s.VAT | float }}

[Krzysztonek]

I believe, that according to G12W tariff, the above code should also consider bank holidays in Poland regardless current week day, when is_peak should be also FALSE the whole day.
@KrzysztofHajdamowicz , would you please be so kind modifying your code accordingly?
It would fully reflect the truth of G12W tariff rates.

You've also mentioned that:

Tauron in G12W uses: 0,36898 PLN/kWh as peak and 0,09028 PLN/kWh off-peak during 2024H2

Can you provide an exact URL where this current data can be scraped online, instead of hardcoding?