I’ve heard a couple of stories recently about people switching to G13 energy tariff saving money on energy bills even without changing their energy usage patterns and habits. I’ve decided to check it on my own, as I already have an energy meter connected to Home Assistant. As the first step, I thought it’d be a good idea to split the counter into three categories: morning peak, afternoon peak, and off-peak. It’d allow me to compare it to the regular G11 tariff at the end of the month.
sensor:
- platform: template
sensors:
energy_tariff_name:
friendly_name: G13 Tariff Name
value_template: >
{% set month = now().strftime('%m') | int %}
{% set hour = now().strftime('%H') | int %}
{% set isSummer = (month >= 4 and month <= 9) | bool %}
{% set isWinter = (month <= 3 or month >= 10) | bool %}
{% set isWorkday = states('binary_sensor.workday_sensor') | bool %}
{% if isWorkday and hour >= 7 and hour < 13 %}
morning_peak
{% elsif isWorkday and (isSummer and hour >= 19 and hour < 22 or isWinter and hour >= 16 and hour < 21) %}
afternoon_peak
{% else %}
off_peak
{% endif %}
The hardest part of figuring out the tariff name is the workday part - G13 assumes all weekends and public holidays as off-peak hours. Fortunately, Home Assistant comes to the rescue with an easy-to-use workday sensor, defined as follows:
binary_sensor:
- platform: workday
country: PL
We’d need to list the tariffs in the utility meter section:
utility_meter:
daily_energy:
source: sensor.home_total_daily_energy
cycle: daily
tariffs:
- morning_peak
- afternoon_peak
- off_peak
monthly_energy:
source: sensor.home_total_daily_energy
cycle: monthly
tariffs:
- morning_peak
- afternoon_peak
- off_peak
The last part is the actual tariff selection. The automation runs
every hour, getting the tariff name from the template sensor defined
above, assigning it to the daily_energy and monthly_energy
entities.
- id: '1666861689467'
alias: Set G13 Tariff
description: ''
trigger:
- platform: time_pattern
minutes: '0'
condition: []
action:
- service: select.select_option
data:
option: "{{ states('sensor.energy_tariff_name') }}"
target:
entity_id: select.daily_energy
- service: select.select_option
data:
option: "{{ states('sensor.energy_tariff_name') }}"
target:
entity_id: select.monthly_energy
mode: single
I’ll try to write a follow-up post in a month or so with a comparison of G11 and G13 tariffs.