Determine a recommended FoxESS work mode to shift battery charging to a later point in the day. This is good for the battery life as well as it assists power providers by taking away feed-in during peak times.

foxess_work_mode.ninja2

{% set options = state_attr('select.h3_work_mode', "options") %}
{% set opt_self_use = options[0] %}
{% set opt_feed_in = options[1] %}

 {# default to self-use #}
{% set recommended_work_mode = opt_self_use %}

{% set pv_power = states('sensor.pv_power_h3') | float(0) %}
{% set pv_energy_expected = states('sensor.solcast_pv_forecast_prognose_verbleibende_leistung_heute') | float(0) %} 
{# require at least some current and expected PV power #}
{# TODO - enhance to select backup during night based on forecast #}
{% if pv_power|round(1) >= 0.5 and pv_energy_expected > 20 %}
 {% if pv_energy_expected > 30 %}
  {% set safe_soc_percent = 40 %}
 {% elif pv_energy_expected > 25 %}
  {% set safe_soc_percent = 60 %}
 {% else %}
  {% set safe_soc_percent = 80 %}
 {% endif %}
 {% set soc = states('sensor.h3_battery_soc') | float(default=0) %}
 {% if soc < safe_soc_percent %}
  {# always ensure a 40% charge #}
  {% set recommended_work_mode = opt_self_use %}
 {% else %}
  {# fetch relevant times and convert to comparable numbers #}
  {% set peak_time = as_timestamp(states('sensor.solcast_pv_forecast_zeitpunkt_spitzenleistung_heute')) %}
  {% set current_time = as_timestamp(utcnow()) %}
  {% set peak_time_reached = current_time > peak_time %}
  {# estimate energy needed to charge battery including a ~ 20 % charging loss #}
  {% set bat_charging_capacity = states('sensor.bat_charging_capacity') | float(0) %}
  {% set total_energy_required = min(bat_charging_capacity * 1.25, bat_charging_capacity + 2.0) %}
  {# estimate remaining energy including a ~ 20 % safety margin #}
  {% set pv_energy_expected_net = pv_energy_expected * 0.8 %} 
  {% set sufficient_energy_left = total_energy_required < pv_energy_expected_net %}
  {% if peak_time_reached or not sufficient_energy_left %}
   {% set recommended_work_mode = opt_self_use %}
  {% else %}
   {% set recommended_work_mode = opt_feed_in %}
  {% endif %}
 {% endif %}
{% endif %}

{{recommended_work_mode}}