Spain is no longer adding renewables at the margin.
It is rebuilding the physical shape of its electricity system around them. In July 2026, renewables represented roughly 109.3 GW of installed generation capacity — about 72% of the country's generation fleet.
109.3 GW is a physical number.
But installed capacity is not the same thing as electricity being produced right now. Solar and wind are variable; the grid lives on the power available at each instant.
The red line marks Spain's 2025 peninsular peak demand: 40.07 GW. The renewable fleet's nameplate capacity is about 2.7× that peak.
The real system is a choreography of sun, wind, demand and storage.
The curves are deliberately simplified. Their job is to show the operational problem: solar arrives fast in the day, wind fills a different rhythm, demand keeps its own shape, and storage moves energy across time.
Illustrative 24-hour cross-section · not a dispatch forecast
More than half the electricity was renewable.
In 2025, renewables supplied 55.5% of Spain's electricity. Counting estimated self-consumption lifts the figure to 56.6%.
Wind remained the largest source of generation without self-consumption at 21.6%, followed by solar PV at 18.4% and hydro at 12.4%.
2025 alone added almost 10 GW of wind + solar.
Red Eléctrica records 8.8 GW of new solar PV and 1.2 GW of new wind in the year. Include self-consumption and the total addition reaches 11.6 GW.
At the end of 2025, almost 50 GW of PV were installed nationwide, making solar the country's largest generation technology by installed capacity when self-consumption is included.
By the end of May 2026, renewables had supplied 62.3% of the peninsular mix.
That is a year-to-date figure, not a full-year forecast. It captures what happens when another wave of solar and wind enters a system that is already more than half renewable.
Red Eléctrica also reported that solar PV and wind together reached 42.8% of peninsular generation in 2025.
What exists is only part of the story.
At 30 June 2026, Red Eléctrica reported 72.8 GW of wind, PV and hybrid generation already in service, plus 75.8 GW with an access permit but not yet in service, and another 28.4 GW with applications still in progress.
These are access-connection figures, not a promise that all projects will be built.
Sun and wind do not arrive where demand is.
Spain's renewable build-out is geographically dispersed: strong solar concentration in the centre and south, strong wind in the north and interior. The consequence is an increasingly important need for transmission, flexible demand and storage.
illustrative storage volume
Generation is scaling faster than flexibility.
At the end of 2025, Spain had 3.43 GW of storage power. The updated 2030 PNIEC target is 22.5 GW.
Red Eléctrica says storage already integrated 9,213 GWh in 2025, helping renewable generation fit the system.
The country is aiming for a system with 76 GW PV, 62 GW wind and 22.5 GW storage.
Those are the updated PNIEC 2023–2030 targets. The plan also calls for 12 GW of electrolyzers for renewable hydrogen.
Spain's renewable challenge is changing.
The hard part is no longer proving that Spain can build solar and wind at scale. The system now has to absorb their output: across geography, across hours, across seasons, and into a much more electrified economy. The next chapter is less about adding megawatts than making those megawatts useful whenever the grid needs them.
Primary sources
Red Eléctrica — 2025 system report; 2026 live data; access & connection data; CECRE 20-year figures.
MITECO — updated PNIEC 2023–2030.
Key figures used
109.3 GW renewable capacity in Jul 2026 · 72% of installed generation capacity · 55.5% renewable generation in 2025 (56.6% with self-consumption) · 62.3% renewable peninsular generation Jan–May 2026 · 3.43 GW storage end-2025 · 22.5 GW PNIEC 2030 storage target.