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feat: add EnergyCharts feed-in tariff provider (#1165)
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The `FeedInTariffEnergyCharts` provider uses the raw Energy-Charts day-ahead market price as the
feed-in tariff. It stores prices in `feed_in_tariff_wh` without adding electricity import charges
or VAT. The data is loaded from the Energy-Charts `/price` endpoint for the configured bidding
zone. The native Energy-Charts resolution, including quarter-hour data, is retained.

Energy-Charts usually supplies prices only for the published day-ahead period. If that data does
not cover the complete configured prediction horizon, the provider extends it as follows:

- With more than 800 hours of history, an ETS (Holt-Winters exponential smoothing) forecast with
  weekly seasonality is used.
- With more than 168 hours of history, an ETS forecast with daily seasonality is used.
- With less history, the median of the available values is used as a constant fallback.

The seasonal periods are adjusted to the source resolution. For example, quarter-hour data uses
four values per hour. Values already supplied by Energy-Charts are kept unchanged; only missing
future slots after the last published price are forecast. Consequently, a 15-minute optimization
uses four forecast values per hour without converting them to hourly averages.

Signed-off-by: Andreas Schmitz <akkudoktor.net>
Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>
This commit is contained in:
Bobby Noelte
2026-07-23 15:48:29 +02:00
committed by GitHub
parent 6093d8d348
commit ed61918fe0
15 changed files with 697 additions and 24 deletions
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docs/akkudoktoreos/prediction.md
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@@ -217,13 +217,49 @@ Configuration options:
- `provider`: Feed in tariff provider id of provider to be used.
- `FeedInTariffEnergyCharts`: Retrieves Energy-Charts day-ahead market prices and extends
them to the configured prediction horizon when necessary.
- `FeedInTariffFixed`: Provides fixed feed in tariff values.
- `FeedInTariffImport`: Imports from a file or JSON string or by endpoint data provision.
- `energycharts.bidding_zone`: Bidding zone Energy Charts shall provide feed-in tariff for.
- `feedintarifffixed.feed_in_tariff_kwh`: Fixed feed in tariff (€/kWh).
- `feedintariffimport.import_file_path`: Path to the file to import feed in tariff forecast data from.
- `feedintariffimport.import_json`: JSON string, dictionary of feed in tariff value lists.
### FeedInTariffEnergyCharts Provider
The `FeedInTariffEnergyCharts` provider uses the raw Energy-Charts day-ahead market price as the
feed-in tariff. It stores prices in `feed_in_tariff_wh` without adding electricity import charges
or VAT. The data is loaded from the Energy-Charts `/price` endpoint for the configured bidding
zone. The native Energy-Charts resolution, including quarter-hour data, is retained.
Energy-Charts usually supplies prices only for the published day-ahead period. If that data does
not cover the complete configured prediction horizon, the provider extends it as follows:
- With more than 800 hours of history, an ETS (Holt-Winters exponential smoothing) forecast with
weekly seasonality is used.
- With more than 168 hours of history, an ETS forecast with daily seasonality is used.
- With less history, the median of the available values is used as a constant fallback.
The seasonal periods are adjusted to the source resolution. For example, quarter-hour data uses
four values per hour. Values already supplied by Energy-Charts are kept unchanged; only missing
future slots after the last published price are forecast. Consequently, a 15-minute optimization
uses four forecast values per hour without converting them to hourly averages.
Example configuration:
```json
{
"feedintariff": {
"provider": "FeedInTariffEnergyCharts",
"energycharts": {
"bidding_zone": "DE-LU"
}
}
}
```
### FeedInTariffImport Provider
The `FeedInTariffImport` provider is designed to import feed in tariff prices from: