Painel 50 Hz · Gaspar do Amaral · English
Simple questions about the electricity reaching homes in Portugal. Answered every day with official hourly data since 2015, checked against the grid operator REN.
Data up to 25 October 2026. The sentences below are recalculated every morning from the same data as the Portuguese pages.
On Sunday, 25 October 2026, the last complete day in the data, the largest source of electricity used in Portugal was imports from Spain (42%), followed by wind 22%, gas 11%, pumped-storage hydro 9%. Sun, wind and water together: 34%.
Full answer, charts and method (in Portuguese) →The worst week since 2015 was 2 January 2015 to 8 January 2015: sun and wind produced only 20% of that year's normal and covered 5% of demand.
Full answer, charts and method (in Portuguese) →In the 10 worst weeks, the country was held up mainly by thermal plants, gas (33%) and coal (21%), and by hydro dams (18%).
Full answer, charts and method (in Portuguese) →In 2025, in 3,115 hours (36% of the year) more than 30% of demand came from Spain, against 568 hours in 2015.
Full answer, charts and method (in Portuguese) →Over the last 12 months, the cheapest hour of the day was 13:00 Lisbon time: 26 €/MWh on average.
Full answer, charts and method (in Portuguese) →In the week of 5 October 2026 to 11 October 2026, Portugal's reservoirs held 1,551 GWh of energy, 93% of the 2015–2025 average for that week (1,676 GWh).
Full answer, charts and method (in Portuguese) →At 11:33 Lisbon time (12:33 in Madrid) on 28 April 2025, the Iberian grid collapsed.
Full answer, charts and method (in Portuguese) →Over the last 12 months, gas burned in Portugal supplied 12% of the electricity available in the country; Spain added an estimated 4% of fossil and 5% of nuclear origin. Portugal has no nuclear plants.
Full answer, charts and method (in Portuguese) →Every number is published as open JSON files, with no key or sign-up, readable from other websites: see Data and API (field names are in Portuguese; units are MW, MWh and €/MWh, times in UTC). A daily RSS feed carries the sentence of the day.
Texts, charts and calculations: CC BY 4.0. Please cite «50 Hz Panel, Gaspar do Amaral, 50hz.aprecisa343.com, ENTSO-E and REN data» with a link. Underlying data remain subject to each source's terms (ENTSO-E Transparency Platform, REN Data Hub, Eurostat, Open-Meteo). For European context we recommend Energy-Charts (Fraunhofer ISE).
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<script src="https://50hz.aprecisa343.com/widget.js" async></script>Gaspar do Amaral is an electrical and computer engineer (Instituto Superior Técnico, Lisbon) who served 28 years in the Portuguese Army as a Signals officer, reaching lieutenant colonel (1990–2018). He works on the integration of critical transport, communications and energy systems and writes the «50 Hz» newsletter on LinkedIn. Press: images and contact · [email protected]