About

Hora Verda shows the hourly electricity price in Spain every day and tells you when to use your most power-hungry appliances. The goal is twofold: to help you pay less and to use power when there is more renewable energy on the grid.

How it works

• Prices are the energy term of the PVPC (2.0TD tariff) published by Red Eléctrica, including tolls and charges and excluding taxes. They are published at around 20:30 for the next day.
• Hours are shown in mainland Spanish time. Days when the clocks change have 23 or 25 hours.
• The cheapest windows are the consecutive hours with the lowest average price of the day. The level (cheap, medium, expensive) splits the day's hours into three equal groups.
• The renewable share and CO₂ emissions are Red Eléctrica's daily generation figures for the whole Spanish power system.
• The site updates itself several times a day. It uses no cookies or trackers.

Open data and widget

You can reuse the data as JSON: https://horaverda.es/api/v1/latest.json. If you use it, credit Red Eléctrica as the source.

To show the cheapest hours on your own website, copy this code:

<iframe src="https://horaverda.es/en/widget/" title="Cheapest hours today" width="320" height="300" style="border:0"></iframe>

Source code

The project is open source. You can read the code, report bugs or suggest improvements on GitHub.