Changelog

2026-03-112026-08-03

Version 2026.8.0 (2026-08-03)

New

Europe-wide: 43 bidding zones across 30 countries, with per-region VAT and unit presets
Automatic price source chain: first-party Kilowahti CDN (ENTSO-E data, all 43 zones) with spot-hinta.fi fallback in Nordic and Baltic zones only; price_data_source diagnostic sensor shows the active source
Local currency display for non-eurozone regions (SEK, NOK, DKK, CHF, PLN, CZK, HUF, RON, RSD, MKD): daily ECB or manual exchange rate, frozen per day; switching currency converts entered prices automatically; exchange_rate diagnostic sensor
23 additional UI languages (25 total) covering all supported regions; many are machine-assisted and native-speaker corrections are welcome
Automation triggers (8) and conditions (5): price/rank acceptability edges, cheapest slot, fixed period start/end, tomorrow's prices available
Effective price statistics sensors (today_avg/min/max, tomorrow_avg/min/max) and spot_next_hours_avg

Changed

Fixed

HACS country filter updated to include all supported price regions: DK, EE, FI, LT, LV, NO, SE

New

Kilowahti is now in the HACS default repository — no custom repository URL needed

Fixed

Monthly score no longer shows NaN at the start of a new month — uses the current quartile midpoint as a placeholder when no consumption is recorded, includes today's in-progress score in the monthly average, and falls back to the previous month's finalised score when the current month is empty
Optimization score accumulation now ranks slots by true total price (fixed-period rate or spot + transfer) instead of spot-only API rank — primarily affects fixed-price contract users
cheapest_hours service now uses total price (fixed-period or spot + transfer) for window selection — was previously spot-only

New

total_price_quartile sensor (1–4)
cheapest_hours accepts reverse: true parameter to return the latest cheapest window on ties

Changed

total_price_rank is now normalized: 1 = cheapest, slots_per_day = most expensive (regardless of unique tier count)

Removed

best_charge_hours service — consolidated into cheapest_hours (use cheapest_hours with reverse: true for the equivalent)

⚠️ Breaking changes

Update any automations or dashboard cards referencing the old entity IDs.

New shiny things

Add generation & export support for users with solar panels and/or home batteries: export pricing sensors, battery charge/discharge optimization sensors and binary sensors, and related services
Add rolling average price sensors (30/60/120 min ahead) — opt-in, 15-min resolution only
Add monthly fixed cost configuration: electricity contract base fee and per-transfer-group fee, shown as a daily cost sensor

Maintenance

Fix tomorrow_total_avg/min/max showing Unknown when a fixed-price period covered tomorrow
Fix optimization score sensors showing 0.0 instead of Unknown when no meter is configured
Fix fixed-price period price field pre-filled with 0.001 in the UI

Fix today_total_avg/min/max to use effective price (respects fixed-price periods) instead of raw spot price
Fix tomorrow_total_avg/min/max to always use fixed price when fixed-price period is active, regardless of whether spot prices have been fetched

First beta release
Add today_total_avg, today_total_min, today_total_max — today's total price (spot + transfer) statistics
Add tomorrow_total_avg, tomorrow_total_min, tomorrow_total_max — tomorrow's total price statistics (unavailable until prices fetched)
Migrate core price logic to kilowahti-py library
Add integration test suite (32 tests)

Add total_price_rank sensor — ranks current slot by total price (spot + transfer) among today's slots
Add writable price_threshold and rank_threshold number entities — adjust thresholds from automations or dashboard without reopening configuration
Transfer price and control factor transfer sensors now always visible; show unavailable when no transfer group is configured
Fix tomorrow_avg, tomorrow_min, tomorrow_max to show unavailable when tomorrow's prices have not yet been fetched

First public test release.