Entso-e day ahead prices integration

[Ales1970]

I am using PredBat v8.34.1 and hass-entso-e (JaccoR ENTSO-E integration) to integrate day-ahead electricity prices into Home Assistant. However, I have not been able to successfully integrate the day-ahead prices into Predbat.
The error I keep getting is:

Warn: record_status Error: Import rates are all zero, not able to compute a plan
Error: Import rates are all zero, not able to compute a plan

The approach I am using is a dedicated sensor (sensor.predbat_import_price) in Home Assistant that Predbat should read.
The sensor value is a number, attributes:
unit_of_measurement: EUR/kWh
friendly_name: Predbat Import Price
state_class: total
device_class: monetary
rates:

• start: "2026-03-09T00:00:00+01:00"
  value: 0.12053
• start: "2026-03-09T01:00:00+01:00"
  value: 0.11173
  ...

Predbat apps.yaml:

Energy rates

metric_import_rate: sensor.predbat_import_price
metric_import_rate_import_code: "rates"
metric_import_rate_scaling: 100
metric_import_rate_type: "generic"
import_rate_min: -0.5

Any ideas what am I doing wrong?

[gcoan]

It appears that you have used AI to help you construct your custom sensor and apps.yaml, that's the first mistake you've made !

There is extensive documentation on what predbat is expecting for energy rates https://springfall2008.github.io/batpred/energy-rates/ and in particular what it is expecting for custom template rates https://springfall2008.github.io/batpred/energy-rates/#other-energy-spot-rate-sensor-integrations

It looks like your sensor doesn't have an end time for a start

All these lines in your apps.yaml are AI fabrications that Predbat will ignore, please read the documentation and not believe anything AI tells you ...

metric_import_rate: sensor.predbat_import_price
metric_import_rate_import_code: "rates"
metric_import_rate_scaling: 100
metric_import_rate_type: "generic"
import_rate_min: -0.5