Electricity system records

⚡ Electricity system records

The all-time highs and lows of the Spanish electricity grid since 2015, calculated from the demand and generation curve that Red Eléctrica publishes every 5 minutes for the Peninsula, the Balearic Islands and the Canary Islands. Each record shows when it was set, which value it beat and how long it has stood. In the last 30 days 8 records have been broken.

All records

Choose the electricity system and the period: instantaneous (the value for a 5-minute interval), hourly average or daily total (the day's energy, or the share and intensity over the whole day). Records broken in the last 30 days are highlighted.

Records broken in the last 30 days

How each record has evolved

Each step marks a time the record was beaten (the first year of each series, when almost everything is a record, is left out). Use the system and period selectors above and choose the metric.

This metric has no records broken outside its first year of data for the current selection.

Most recent records are for solar PV, renewable share and minimum emissions, as installed solar capacity grows; maximum demand records, by contrast, are rarely broken.

Methodology and sources

• Data: demand and generation curve by technology from Red Eléctrica's demand viewer (one value every 5 minutes, in MW) for the peninsular system (from 2015 on this page), the Balearic Islands (from 2018) and the Canary Islands (from 2015). Prices are the day-ahead market spot price from REE's REData API (hourly and, since the 15-minute market, quarter-hourly averaged to the hour). Latest date with data: 2 Oct 2026.
• Periods: instantaneous is the value for a 5-minute interval; hourly average, the mean of the 12 intervals in the hour (at least 10 are required); daily total, the day's energy (GWh) or, for shares, intensity and price, the value for the whole day (complete days only).
• Renewable follows REE's definition: wind, solar PV, solar thermal, hydro and other renewables (biomass, biogas, renewable waste). Pumped storage turbining and batteries do not count as renewable because they return stored energy. The renewable share is renewable / total generation.
• Emissions: CO2 from generation using the emission factors by technology that REE's own viewer applies to each system (t CO2/MWh; much higher on the islands); imports are not included.
• Demand excluding self-consumption: since late 2025 REE's viewer adds an estimate of self-consumption to demand and to solar PV; here it is subtracted so that the series is consistent with earlier years and with official statistics (each month's maximum instantaneous demand differs from REE's official figure, measured by the minute, by 0.3 % on average).
• Quality: instants whose balance does not add up (demand versus generation, exchanges and consumption with a gap of more than 5 %) are discarded, as are isolated spikes that stand apart from the values for the 5 minutes before and after, which are one-off errors in the source; hourly averages and daily totals are calculated from valid instants. The blackout of 28 April 2025 and the following day are excluded, as they are not genuine records for minimum demand or renewable share.
• Exchanges by country: the viewer only breaks down flows with France, Portugal, Morocco and Andorra from late 2024; for earlier hourly averages and daily totals, the net balance telemetered at each border by ESIOS (REE) is used.
• Limitations: until 2018 REE grouped cogeneration, waste and biomass under "other special regime" (counted here as cogeneration, which slightly understates the renewable share for those years); between 2021 and 2025 a remainder of about 100-350 MW is not broken down; until around 2022 hydro is published net of pumping consumption; instantaneous records by border only cover the period from late 2024; batteries appear from when REE began publishing them. The viewer's values are real-time data and may differ slightly from REE's official closing figures.
• Inspired by the records page of Open Electricity (Australia).