TL;DR
Spain’s rapid growth in wind and solar power has significantly lessened the influence of gas on electricity prices, shielding consumers from rising gas costs. This shift is supported by increased energy storage and regulatory reforms, enhancing system resilience.
Spain has substantially reduced its reliance on gas for electricity generation, with renewables now setting power prices only 9% of the time in early 2026, down from 52% in 2021, according to a report by Ember. This shift has helped shield households from rising gas prices amid geopolitical tensions, saving an average of €10 per month on electricity bills.
The analysis shows that the increasing share of wind and solar power in Spain’s energy mix—up 37% between 2021 and 2025—has diminished the role of gas-fired plants in setting wholesale prices. In the first five months of 2026, gas set prices only 9% of the time, compared to over half of the time in 2021.
During recent geopolitical tensions in the Middle East, renewable generation across the Iberian Peninsula remained strong, displacing fossil-fuel plants and mitigating the impact of rising gas prices on wholesale markets. As a result, Spain and Portugal experienced some of the lowest wholesale electricity prices in the EU, with averages around €42/MWh, versus €143/MWh in Italy.
Ember estimates that if Spain’s electricity system had maintained its previous level of gas dependence, households would be paying approximately €10 more per month, nearly a 19% increase, due to the lower wholesale costs driven by renewables. The report highlights the growing importance of battery storage, which quadrupled in capacity in 2025 and is expected to double again in 2026, supporting grid stability and reducing reliance on gas plants for ancillary services.
Renewables as a Buffer Against Gas Market Volatility
The shift toward renewable energy in Spain provides a buffer against volatile gas markets, reducing costs for consumers and enhancing energy security. This transition also demonstrates the resilience of a renewables-led power system in the face of geopolitical tensions and supply disruptions, setting a potential model for other EU countries.
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Spain’s Renewable Expansion and Energy Transition Timeline
Spain’s renewable capacity has grown rapidly over recent years, with wind and solar power expanding by 37% from 2021 to 2025. This growth was accelerated by policy reforms and increased investments, especially after the 2025 Iberian blackout, which prompted regulatory changes to support grid resilience and storage deployment. Prior to this, gas-fired plants played a dominant role in setting electricity prices, but their influence has waned significantly in recent years.
“The increasing share of renewables has decoupled Spanish electricity prices from gas market fluctuations, providing significant cost savings for households.”
— an anonymous researcher
Uncertainties Surrounding Future Renewable Deployment and Policy
It remains unclear how future policy changes, permitting processes, and grid expansion efforts will impact Spain’s renewable growth trajectory. Additionally, the long-term effects of increased storage capacity and ancillary services participation on overall system costs and stability are still being evaluated.
Next Steps in Spain’s Renewable and Energy Security Strategy
Spain is expected to continue expanding wind and solar capacity, supported by regulatory reforms aimed at streamlining permitting and strengthening the grid. Further investments in storage and electrification of end-use sectors are also anticipated to extend the benefits of renewables and reduce dependence on imported fossil fuels.
Key Questions
How much have renewables reduced electricity prices in Spain?
According to Ember, renewables have helped reduce household electricity bills by approximately €10 per month, mainly by decreasing wholesale market exposure to gas price fluctuations.
Why has Spain been able to shield consumers from gas price increases?
The rapid expansion of wind and solar power has decreased the role of gas plants in setting electricity prices, making the system less vulnerable to gas market volatility.
What role does energy storage play in Spain’s energy resilience?
Battery storage systems have quadrupled in capacity, supporting grid stability, enabling renewable participation in ancillary services, and reducing reliance on fossil fuel plants for system balancing.
Are there risks to Spain’s renewable expansion plans?
Potential delays in permitting, grid reinforcement challenges, and policy uncertainties could slow deployment, affecting the long-term benefits of the transition.
What is the next phase of Spain’s energy transition?
Further expanding renewable capacity, accelerating electrification, and investing in storage and grid infrastructure are key steps to sustain energy security and economic benefits.
Source: PV Magazine
