Red Eléctrica Asks Industry to Cut Power Again Due to Low Wind 2026

Red Eléctrica, Spain's national grid operator, has once again called on industrial consumers to reduce their electricity consumption, this time due to lower-than-expected wind generation. The request, made on July 22, marks the third time this year that the operator has activated its active demand response service, known as SRAD, and the second time in less than a week.

The move highlights the growing challenges of integrating variable renewable energy sources into the grid and the increasing role of demand-side flexibility in maintaining supply security.

What Happened: Low Wind Triggers Demand Response

On the evening of July 22, Red Eléctrica activated the SRAD service at 22:18 and maintained it until midnight. The operator had observed that wind generation was falling short of forecasts, creating a potential imbalance between supply and demand.

During the activation, approximately 943 MW of the 1,775 MW of contracted demand response capacity was used, about half of the available total. This allowed the grid operator to stabilize the system without resorting to more expensive or carbon-intensive backup generation.

How the SRAD Service Works

The SRAD is a balancing tool that provides additional flexibility to the electricity system when there is an imbalance between generation and demand. Large electricity consumers, primarily industrial facilities, voluntarily join the service and commit to reducing or postponing part of their consumption when requested.

In exchange for this flexibility, participants receive compensation. The service is designed to handle oscillations in energy resources and reserves, helping to maintain grid stability as renewable penetration increases.

• Voluntary participation: Industrial consumers sign up voluntarily and are compensated for their flexibility.
• Rapid response: The service can be activated at short notice to balance supply and demand.
• Growing frequency: This was the third activation in 2025, indicating increased grid stress.
• Wind variability: Lower-than-forecast wind output was the trigger for this activation.
• Capacity used: About 943 MW of the 1,775 MW contracted was deployed.

Why It Matters: The Challenge of Variable Renewables

Spain has aggressively expanded its wind and solar capacity, aiming to decarbonize its economy. However, the variability of these sources means the grid must increasingly rely on flexibility mechanisms to balance supply and demand in real time.

Demand response is one such mechanism. By incentivizing large consumers to adjust their usage, the grid can avoid activating fossil-fuel peaking plants or curtailing renewable generation. This not only reduces costs but also lowers emissions.

The frequency of SRAD activations this year—three times so far—suggests that the grid is facing more frequent imbalances. This could be due to a combination of factors, including weather patterns, forecast errors, and the growing share of renewables.

Who Is Affected: Industrial Consumers and the Grid

The primary participants in the SRAD are energy-intensive industries such as steel, cement, and chemicals. When activated, these companies must reduce their consumption, which can impact production schedules and costs.

However, participation is voluntary and financially compensated, making it an attractive option for some. For the grid, the service provides a valuable buffer against supply shortfalls.

For ordinary consumers, the impact is indirect: the service helps keep the lights on and may reduce price volatility.

What to Watch Next: Grid Flexibility and Market Design

As Spain continues to add renewables, the need for flexibility will only grow. Red Eléctrica is likely to expand its demand response programs and seek new sources of flexibility, including storage and interconnection.

Regulators may also need to adapt market rules to better value demand-side resources. The success of the SRAD will depend on how well it can scale and integrate with other flexibility options. The background to this story is set out in Demand Response Payments Cost Consumers Nearly €1 Billion in Spain. A related thread runs through Spain's Grid Crisis: Seven Demand Response Alerts in 10 Weeks. Earlier coverage in Red Eléctrica Blocks Maintenance on Over 100 Power Plants to Secure Supply shows how the argument developed.

Meanwhile, the wind forecast will remain a key variable. A calm, cloudy day can strain the system, especially during peak demand periods. The grid operator will need to stay vigilant and continue to innovate. A closer look at the same subject appears in Spain's September Electricity Price Hike Explained: Red Eléctrica Adjustment. Anyone following the wider picture can start with Renewable Energy Quiz: Test Your Knowledge of UK Power Sources. The same theme surfaces in Cuba scrambles to recover after second power grid collapse, which takes a different angle.

The table above summarizes the known activations of the SRAD service this year. The July 22 event is notable for its explicit link to wind underperformance. Context on how this played out before sits in Energy Utilities: latest articles.

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