Home quickstart

European electricity prices in Home Assistant

Connect one European bidding zone to Home Assistant with day-ahead prices and a measured seven-day forecast.

Short answer

Voltcast Home provides one selected European bidding zone, native-resolution day-ahead prices, a P50 forecast, 90 days of history, and one webhook rule for €9/month after a 7-day card-required trial.

Forecast performance is published daily on the public accuracy board; losing zones remain visible.

Live DE-LU example: €124.31/MWh for 2026-08-29 22:15–22:30 GMT+0000; source smard.

Set it up

  1. 1 Create a Home account and select the bidding zone used by your electricity contract.
  2. 2 Create an API key on the dashboard.
  3. 3 Add the Voltcast integration or a REST sensor with the authenticated prices endpoint.
  4. 4 Start with a notification automation; only then allow it to control charging or heating.

Verify the data first

curl -H "Authorization: Bearer YOUR_API_KEY" "https://voltcast.com/api/v1/prices/YOUR_ZONE"

Check zone, units, source, issuance time, native resolution, and gaps before connecting a physical device. An example live public context is at /zones/DE-LU.

Working resources

Home Assistant component source →

Example task

Notify me when tomorrow contains a negative-price period in my selected zone.