Changed all selector option keys from uppercase to lowercase to comply
with Home Assistant's hassfest validation pattern [a-z0-9-_]+.
Fixed inconsistency in PEAK_PRICE_MIN_LEVEL_OPTIONS where some values
were uppercase while others were lowercase.
Changes:
- translations/*.json: All selector keys now lowercase (volatility, price_level)
- const.py: Added .lower() to all PEAK_PRICE_MIN_LEVEL_OPTIONS values
- binary_sensor.py: Added .upper() conversion when looking up price levels
in PRICE_LEVEL_MAPPING to handle lowercase config values
Impact: Config flow now works correctly with translated selector options.
Hassfest validation passes without selector key errors.
Added comprehensive volatility analysis system:
- 4 new volatility sensors (today, tomorrow, next_24h, today+tomorrow)
- Volatility classification (LOW/MODERATE/HIGH/VERY HIGH) based on price spread
- Configurable thresholds in options flow (step 6 of 6)
- Best/Peak price period filters using volatility and price level
- Price spread calculation in get_price service
Volatility sensors help users decide if price-based optimization is worthwhile.
For example, battery optimization only makes sense when volatility ≥ MODERATE.
Period filters allow AND-logic combinations:
- best_price_min_volatility: Only show cheap periods on volatile days
- best_price_max_level: Only show periods when prices reach desired level
- peak_price_min_volatility: Only show peaks on volatile days
- peak_price_min_level: Only show peaks when expensive levels occur
All 5 language files updated (de, en, nb, nl, sv) with:
- Volatility sensor translations (name, states, descriptions)
- Config flow step 6 "Volatility" with threshold settings
- Step progress indicators added to all config steps
- Period filter translations with usage tips
Impact: Users can now assess daily price volatility and configure period
sensors to only activate when conditions justify battery cycling or load
shifting. Reduces unnecessary battery wear on low-volatility days.
- Revised various phrases for clarity and consistency in Dutch (nl.json) and Swedish (sv.json) translations.
- Changed terms from "woning" to "huis" in Dutch for better contextual accuracy.
- Improved readability and grammatical correctness in both languages.
- Ensured all user-facing strings are updated to reflect the latest terminology and phrasing.
- Updated keys from "cents" to more user-friendly terms for current, next, and previous prices.
- Added state descriptions for price levels and ratings, including categories like "very cheap," "cheap," "normal," "expensive," and "very expensive."
- Introduced new average price sensors for the next 1 to 12 hours.
- Added price trend sensors for 1 to 12 hours with states indicating rising, falling, or stable trends.
- Ensured consistency in naming conventions across English, Norwegian, Dutch, and Swedish translations.
