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add configurable VAT rate for electricity price calculations (#680)

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* add configurable VAT rate for electricity price calculations

* add VAT rate configuration for electricity price calculations in docs

* added vat_rate

* fix: Format VAT rate field definition according to ruff formatting standards

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Co-authored-by: Börni <kontakt@bernhardhientz.com>
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boerni
2025-09-14 23:53:41 +02:00
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parent d362aa7298
commit a4cce85ebd
5 changed files with 4912 additions and 4882 deletions
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docs/akkudoktoreos/prediction.md
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@@ -123,6 +123,7 @@ Configuration options:
- `ElecPriceImport`: Imports from a file or JSON string.
- `charges_kwh`: Electricity price charges (€/kWh).
- `vat_rate`: VAT rate factor applied to electricity price when charges are used (default: 1.19).
- `provider_settings.import_file_path`: Path to the file to import electricity price forecast data from.
- `provider_settings.import_json`: JSON string, dictionary of electricity price forecast value lists.
@@ -147,7 +148,7 @@ real-time market data with historical price trends.
Charges and VAT
- If `charges_kwh` configuration option is greater than 0, the electricity price is calculated as:
`(market price + charges_kwh) * 1.19 VAT` (including 19% VAT).
`(market price + charges_kwh) * vat_rate` where `vat_rate` is configurable (default: 1.19 for 19% VAT).
- If `charges_kwh` is set to 0, the electricity price is simply: `market_price` (no VAT applied).
**Note:** For the most accurate forecasts, it is recommended to set the `historic_hours` parameter to 840.