How Spain’s Real Decreto-Ley 7/2025 accelerates BESS projects

Here, we explain how the new Spanish legal framework, Real Decreto-Ley 7/2025, paves the way to accelerate battery energy storage system (BESS) projects by reducing bureaucracy, risks, and operational uncertainty.

You’ll understand:

• What changed with the new decree
• Why battery storage is becoming essential
• How it impacts your O&M routine
• And how Delfos already offers solutions for this new landscape
  
  

What is Real Decreto-Ley 7/2025?

Approved in June 2025, RDL 7/2025 is the Spanish government’s response to the growing need to reinforce the power grid and accelerate the energy transition. The decree introduces urgent measures to enable the development of energy storage systems, especially battery-based, and to strengthen the country’s energy security after the blackout in April.

The main focus is to remove regulatory barriers and speed up renewable generation and storage projects.

According to UNEF data, following the publication of RDL 7/2025, more than 500 MW of new BESS projects entered the public consultation phase, signaling an immediate market acceleration.

Why is it so important for BESS projects?

The decree brought practical and direct changes that make storage projects more viable, faster, and more profitable:

• Public interest status granted to BESS projects, easing access to land and evacuation lines
• Simplified licensing for hybrid plants (renewable + battery), with unified construction and operation processes
• No need for a new environmental assessment when installing batteries at already licensed plants, if within the same perimeter
• Priority dispatch for hybrid systems, ensuring stored energy is injected into the grid with precedence
• More flexible grid access: batteries are treated as "demand units," simplifying the connection process
• Extended regulatory deadlines: the well-known "5th milestone" has been postponed, giving breathing room to projects under development
  
  

These changes reduce development time, minimize legal risks, and bring operational and financial predictability.

What is BESS and its role in the energy transition?

BESS (Battery Energy Storage Systems) are systems that store electricity, usually generated by renewable sources, and make it available during peak demand periods.

Imagine a solar plant that generates more than needed at noon. Without batteries, the surplus would be wasted. With a BESS, that energy is stored and used at night or during low-generation periods.

This balances supply and demand, relieves pressure on the grid, and increases energy efficiency. In a highly renewable and intermittent system like Spain’s, this makes all the difference.

How does this impact O&M operations?

For those on the frontlines ensuring performance and reliability of energy assets, the impact is immediate:

• Fewer delays: with simplified licenses, projects move faster
• More predictability: the new framework reduces regulatory uncertainties
• More data: batteries enable smarter, more controlled operations
• More opportunities: opens the market to ancillary services like demand response and voltage/frequency modulation
  
  

How does Delfos support this transition?

Delfos recently launched its BESS solution within the new Delfos 4.0 platform, already in use in European operations.

Our delivered modules include:

Smart Monitoring

Real-time monitoring of key battery KPIs such as:

• State of Charge (SoC)
• Depth of Discharge (DoD)
• State of Health (SoH)
• Active power
• Relative humidity
  
  

Historical analysis and rack comparison

Identify anomalies by container or rack, understand behavior patterns, and optimize operations based on data.

Data Studio

You can build custom charts, export datasets, and generate reports quickly.

• This allows your O&M team to:
• Anticipate failures
• Avoid underperformance
• Demonstrate real results to stakeholders

All in an intuitive, modular interface tailored to your operational context.

Real cases and proof of impact

For one of our European clients, we’ve already delivered the first BESS Go Live with full integration of all monitoring modules.

Using the platform, the technical team reduced diagnosis time by 35% within the first few weeks, even with just one container in the system.

A milestone for the sector and a turning point for O&M

Real Decreto-Ley 7/2025 is more than a regulatory change. It’s an invitation to innovate and boost operational efficiency.

For O&M professionals, it means:

• Less bureaucracy
• More performance
• Greater technical leadership
  
  

And with Delfos, you have the technology to monitor, predict, and make smarter decisions with your storage assets.

Ready to go further?

Talk to our team to discover how our BESS solutions can integrate with your operation. Or share this content with someone also following Spain’s energy transition closely.