Error while processing template ... ZeroDivisionError: float division by zero

Hi there,

since a few weeks I have a problem I can’t get rid of… I searched a lot in the forum (you can find many things to “float division by zero”), but I could not solve my problem. I now have a template that is the most compact I could create for my needs and to make it easy to you to understand (I hope so…)

_sensor.yaml

strom_eigenverbrauchsanteil: # Ratio in Percent = Home Consumption / Home Production(Solar, Battery)*100
  friendly_name: "Eigenverbrauchsanteil"
  unit_of_measurement: "%"
  value_template: >-
    {% set ratio = ((100/((states('sensor.PV_ACPowerValue') | float(0) + states('sensor.varta_entladung_only') | float(0)) / (states('sensor.varta_beladung_only') | float(0.001) + states('sensor.strom_aktueller_verbrauch') | float(0.001) + 0.001))) | float(0) | round(0)) %}
    {% if ratio > 100 %}
      {{ 100 }}
    {% elif ratio < 0 %}
      {{ 0 }}
    {% elif ((ratio >= 0) and (ratio <= 100)) %}
      {{ ratio }}
    {% else %}
      {{ 0 }}
    {% endif %}

_{home-assistant.log}

2022-05-06 11:19:09 ERROR (MainThread) [homeassistant.helpers.event] Error while processing template: Template("{% set autarky = ((states('sensor.PV_ACPowerValue') | float(0) + (states('sensor.varta_aktuelle_leistung_kw') | float(0)) * -1) * 100 / (states('sensor.strom_aktueller_verbrauch') | float(0.001) + states('sensor.strom_einspeisung') | float(0.001))) | float(0) | round(0) %} {% if autarky > 100 %}
  {{ 100 }}
{% elif autarky < 0 %}
  {{ 0 }}
{% elif ((autarky >= 0) and (autarky <= 100)) %}
  {{ autarky }}
{% else %}
  {{ 0 }}
{% endif %}")
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 409, in async_render
    render_result = _render_with_context(self.template, compiled, **kwargs)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1859, in _render_with_context
    return template.render(**kwargs)
  File "/usr/local/lib/python3.9/site-packages/jinja2/environment.py", line 1291, in render
    self.environment.handle_exception()
  File "/usr/local/lib/python3.9/site-packages/jinja2/environment.py", line 926, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "<template>", line 1, in top-level template code
ZeroDivisionError: float division by zero

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 525, in async_render_to_info
    render_info._result = self.async_render(variables, strict=strict, **kwargs)
  File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 411, in async_render
    raise TemplateError(err) from err
homeassistant.exceptions.TemplateError: ZeroDivisionError: float division by zero
2022-05-06 11:19:09 ERROR (MainThread) [homeassistant.components.template.template_entity] TemplateError('ZeroDivisionError: float division by zero') while processing template 'Template("{% set autarky = ((states('sensor.PV_ACPowerValue') | float(0) + (states('sensor.varta_aktuelle_leistung_kw') | float(0)) * -1) * 100 / (states('sensor.strom_aktueller_verbrauch') | float(0.001) + states('sensor.strom_einspeisung') | float(0.001) + 0.001)) | float(0) | round(0) %} {% if autarky > 100 %}
  {{ 100 }}
{% elif autarky < 0 %}
  {{ 0 }}
{% elif ((autarky >= 0) and (autarky <= 100)) %}
  {{ autarky }}
{% else %}
  {{ 0 }}
{% endif %}")' for attribute '_attr_native_value' in entity 'sensor.strom_autarky'

the 0.001 ist just added to avoid “float division by zero”. I don’t get why it is still possible that my calculation tries to divide by zero. I think catch every error.

The error appears after I restart my Home-Assistant.

Home Assistant Core 2022.5.1
Home Assistant Supervisor 2022.05.0
Home Assistant OS 7.4
Kernel version 5.10.98
Agent version 1.2.1

thanks i advance!

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