hass.tibber_prices/docs/user/versioned_docs/version-v0.31.0/config-best-price.md

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💚 Best Price Period

💚 Best Price Period

Settings → Devices & Services → Tibber Prices → Configure → 💚 Best Price Period

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Best Price Period sensors detect windows of time when electricity is cheap enough to be worth scheduling loads (dishwasher, washing machine, EV charging, water heater). The binary sensor is_best_price_period is on during these windows.

See Period Calculation for an in-depth explanation of the detection algorithm and Period Relaxation for how the relaxation strategy works.

Settings

Period Settings

Setting	Default	Description
Minimum period length	60 min	Shortest window to report as a period — filters out tiny sub-hour dips
Maximum price level	CHEAP	Only intervals at this Tibber level or cheaper qualify
Gap tolerance	1	Consecutive above-threshold intervals allowed inside a period — bridges small price bumps between two cheap windows

Flexibility Settings

Setting	Default	Description
Flex percentage	15%	How far above the daily minimum a price can be and still qualify. Higher = more intervals qualify
Minimum distance from average	5%	Qualifying intervals must be at least this far below the daily average — ensures periods are meaningfully cheap, not just "not expensive"

Relaxation & Target

Setting	Default	Description
Enable minimum period target	On	Automatically loosens criteria (relaxation) until the target count is reached
Target periods per day	2	How many distinct periods the algorithm aims to find per day
Relaxation attempts	11	How many times to loosen the criteria before giving up. 11 steps × 3% increment = up to ~48% flex

:::tip Start with defaults The defaults are tuned for typical European electricity markets. If you're unsure, leave them as-is and observe the binary sensor over a few days. :::

Runtime Override Entities

You can override these settings at runtime through automations — useful for seasonal adjustments or dynamic schedules — without opening the configuration menu.

These entities are disabled by default. Enable them in Settings → Devices & Services → Tibber Prices → Entities.

Entity	Type	Range	Overrides
number.<home_name>_best_price_flexibility	Number	0–50%	Flex percentage
number.<home_name>_best_price_minimum_distance	Number	-50–0%	Minimum distance from average
number.<home_name>_best_price_minimum_period_length	Number	15–180 min	Minimum period length
number.<home_name>_best_price_minimum_periods	Number	1–10	Target periods per day
number.<home_name>_best_price_relaxation_attempts	Number	1–12	Relaxation attempts
number.<home_name>_best_price_gap_tolerance	Number	0–8	Gap tolerance
switch.<home_name>_best_price_enable_relaxation	Switch	On/Off	Enable relaxation

When an override entity is enabled, its value takes precedence over the menu setting. When disabled (default), the menu setting is used.

Changing a value triggers immediate period recalculation. Entity values are restored automatically after HA restarts.

Example: Stricter detection in winter

Show YAML: Seasonal override automation

automation:
  - alias: "Winter: Stricter Best Price Detection"
    trigger:
      - platform: time
        at: "00:00:00"
    condition:
      - condition: template
        value_template: "{{ now().month in [11, 12, 1, 2] }}"
    action:
      - service: number.set_value
        target:
          entity_id: number.<home_name>_best_price_flexibility
        data:
          value: 10  # Stricter than default 15%

See Runtime Override Entities for more details, including how overrides work, how to view entity descriptions, and recorder optimization.