Seasonal price and generation comparisons for Spain.
Electricity price and renewable statistics for Spain
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Electricity generation in kWh by season
Values are grouped from REE generation structure data for each range.
Totals cover the dates shown. Renewable and solar + wind generation are parts of the total. The five largest technologies are shown. Values are converted from MWh to kWh and rounded to the nearest kWh.
Average hourly price: summer versus winter
Two bars per hour: summer and winter. Prices in €/kWh.
Renewable vs non-renewable generation by year
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The last five complete calendar years plus the current year to date. The current year is partial and uses the latest available REE data; its total is not directly comparable to a full year. The lines show renewable (green) and non-renewable (amber) generation. The dashed segment marks the partial current year; diamonds mark the estimated full-year values. Observed totals and a separate year-end estimate are listed below.
Installed generation capacity in Spain
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Installed capacity is generation capability, measured in MW. This is a snapshot of the latest value published by Red Eléctrica, not energy generated during the year.
Total installed capacity
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Installed capacity over time
The same month in each of the last five years and the current year. These are installed-capacity snapshots, not cumulative generation.
Capacity by technology: last six years
Each line shows installed capacity for a technology in the same month over the last six years, in MW.
Source: Red Eléctrica installed capacity. Values are rounded to the nearest MW.
What the electricity statistics show
Power Window is not trying to prove that one season is always cheap. The point is to show patterns: how hourly price shape changes and how generation is distributed across technologies over longer periods.
Summer and winter do not have the same shape
In summer, solar production can make some midday hours competitive. In winter, demand and lower solar output change the curve. That is why hourly averages matter more than a single daily average.
Renewable does not mean zero price
Even with strong solar and wind output, hourly prices also depend on demand, marginal technologies, hydro, interconnections, and system adjustments. Renewable share is a signal, not the whole explanation.
Why this matters for flexible users
If a household can shift some consumption, seasonal statistics help reveal when opportunities tend to appear. The planner then uses the specific day to decide the actual hour for a charge or appliance.