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docs(community-examples): update Germany section for feed-in compensation details
Revise the Germany section to focus on feed-in compensation for exported PV energy and provide detailed steps for creating input number helpers and template sensors. Impact: Users can better understand and implement feed-in compensation calculations in their Home Assistant setups.
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Julian Pawlowski
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1 changed files with 113 additions and 22 deletions
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@ -244,44 +244,135 @@ entities:
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---
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## 🇩🇪 Germany: Price Composition
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## 🇩🇪 Germany: Feed-In Compensation
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### Background
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In Germany, the electricity price includes numerous components bundled into `tax`:
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In Germany, private households usually get a **fixed feed-in compensation** (Einspeisevergütung) for exported PV energy, while consumption uses the dynamic end-user price from your tariff.
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| Component | German Name | Description |
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|-----------|-----------|-------------|
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| Spot price | Börsenstrompreis | Variable in ct/kWh (= `energy_price` attribute, divide by 100 for €/kWh) |
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| Grid fees | Netzentgelte | Varies by grid operator |
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| Electricity tax | Stromsteuer | Fixed per kWh |
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| Concession fee | Konzessionsabgabe | Varies by municipality |
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| Surcharges | Umlagen (§19, Offshore, KWKG) | Various regulatory surcharges |
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| VAT | Mehrwertsteuer | 19% |
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That means the practical question is often:
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### Template: Spot Price Share
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- consume/store energy locally now, or
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- export now at your fixed feed-in rate
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A simple template sensor showing what percentage of your total price is the actual energy cost:
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### Step 1: Create Input Number Helper for Feed-In Compensation
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Create one helper for your current contractual feed-in rate in `€/kWh`.
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**Settings → Devices & Services → Helpers → Create Helper → Number**
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| Helper | Entity ID | Min | Max | Step | Unit | Example Value |
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|--------|-----------|-----|-----|------|------|---------------|
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| Einspeisevergütung | `input_number.einspeiseverguetung` | 0 | 1 | 0.0001 | €/kWh | 0.0778 |
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:::note Keep this value up to date
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Use the exact value from your contract or network operator statement. Typical values differ by commissioning date and plant setup (partial vs full feed-in).
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:::
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<details>
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<summary>Show YAML: Spot Price Share</summary>
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<summary>Show YAML: Input Number Helper</summary>
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```yaml
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input_number:
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einspeiseverguetung:
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name: Einspeisevergütung
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min: 0
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max: 1
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step: 0.0001
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unit_of_measurement: "€/kWh"
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icon: mdi:transmission-tower-export
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```
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</details>
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### Step 2: Template Sensors for Feed-In Decision Support
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These sensors normalize your current price to `€/kWh`, compare it with your fixed feed-in compensation, and expose a clean binary signal for automations.
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:::note Display-mode safe
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`current_electricity_price` can be in `ct/kWh` or `€/kWh` depending on display mode. The template below normalizes automatically to `€/kWh`.
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:::
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<details>
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<summary>Show YAML: Feed-In Decision Sensors</summary>
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```yaml
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template:
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- sensor:
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- name: "Spot Price Share"
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unique_id: spot_price_share
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unit_of_measurement: "%"
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- name: "Current Electricity Price (EUR normalized)"
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unique_id: current_electricity_price_eur_normalized
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unit_of_measurement: "€/kWh"
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device_class: monetary
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state: >
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{% set energy_ct = state_attr('sensor.<home_name>_current_electricity_price', 'energy_price') %}
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{% set total = states('sensor.<home_name>_current_electricity_price') | float %}
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{% if energy_ct is not none and total > 0 %}
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{% set energy = energy_ct / 100 %}
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{{ ((energy / total) * 100) | round(1) }}
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{% set price_entity = 'sensor.<home_name>_current_electricity_price' %}
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{% set total_raw = states(price_entity) | float(none) %}
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{% set price_unit = state_attr(price_entity, 'unit_of_measurement') %}
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{% set unit_factor = 100 if price_unit == 'ct/kWh' else 1 %}
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{% if total_raw is not none %}
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{{ (total_raw / unit_factor) | round(4) }}
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{% else %}
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unavailable
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{% endif %}
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icon: mdi:chart-pie
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icon: mdi:currency-eur
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- name: "Self-Consumption Advantage"
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unique_id: self_consumption_advantage
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unit_of_measurement: "€/kWh"
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device_class: monetary
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state: >
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{% set import_price = states('sensor.current_electricity_price_eur_normalized') | float(none) %}
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{% set feed_in = states('input_number.einspeiseverguetung') | float(none) %}
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{% if import_price is not none and feed_in is not none %}
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{{ (import_price - feed_in) | round(4) }}
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{% else %}
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unavailable
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{% endif %}
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icon: mdi:scale-balance
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- binary_sensor:
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- name: "Prefer Self-Consumption"
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unique_id: prefer_self_consumption
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state: >
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{% set advantage = states('sensor.self_consumption_advantage') | float(none) %}
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{{ advantage is not none and advantage > 0 }}
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icon: mdi:home-lightning-bolt
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```
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</details>
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### Step 3: Use in Automations
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Use the binary sensor to switch behavior between export-oriented and self-consumption-oriented operation.
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<details>
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<summary>Show YAML: Example Automation (Battery Charging Strategy)</summary>
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```yaml
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automation:
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- alias: "Battery: Prefer self-consumption when import price is higher than feed-in"
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trigger:
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- platform: state
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entity_id: binary_sensor.prefer_self_consumption
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action:
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- choose:
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- conditions:
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- condition: state
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entity_id: binary_sensor.prefer_self_consumption
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state: "on"
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sequence:
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# Example: keep energy locally (charge battery / reduce export)
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- service: switch.turn_on
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target:
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entity_id: switch.battery_charging
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- conditions:
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- condition: state
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entity_id: binary_sensor.prefer_self_consumption
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state: "off"
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sequence:
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# Example: allow more export to grid
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- service: switch.turn_off
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target:
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entity_id: switch.battery_charging
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```
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</details>
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