On April 28th, a major blackout affected parts of Portugal and Spain, interrupting transport, business operations, and daily routines. Although power was restored within hours, the event sparked an important question: as we transition to greener energy, are we putting the reliability of our electricity system at risk?
Portugal and Spain are among Europe’s leaders in renewable energy. Today, a large share of the electricity we consume comes from wind, solar, and hydropower. This is a vital step toward fighting climate change and reducing our dependence on fossil fuels. But the blackout was a reminder: while renewables bring many benefits, they also introduce new challenges.
Unlike fossil fuels, renewable energy depends on nature—and nature doesn’t follow a schedule. Cloudy days, calm winds, and seasonal changes can all affect how much electricity is generated. To keep the power flowing smoothly, our electricity grids must evolve. They need to be smarter, faster, and more flexible than ever before. This is where technology and data become essential. Digital tools now help grid operators predict supply and demand, detect faults in real time, and automatically balance electricity across regions. Sensors, AI algorithms, and advanced software are playing a growing role in ensuring energy flows are stable—even when the sources of that energy are not.
Think of the modern grid like a giant, living system—one that needs constant monitoring and intelligent control. Huge amounts of data are being collected every second to make sure everything stays in balance. This digital layer is just as important as the physical infrastructure of cables and transformers. Without it, the risk of future blackouts would grow.
But this isn’t just about equipment—it’s also about people. Building a sustainable and resilient energy system requires a whole ecosystem: companies that develop cutting-edge technologies, industries that commit to flexible energy use, and professionals with the skills to make it all work. Engineers, analysts, software developers, electricians, and decision-makers all play a part.
The blackout, though disruptive, is an opportunity. It highlights the urgency of investing not just in clean energy—but in modern, data-driven energy networks. For Portugal and Spain, it’s a chance to strengthen their position as leaders in both sustainability and innovation.
Industries must align their green goals with operational reliability. Energy providers must build stronger systems, while managing the growing complexity. And society must support this transition with awareness, education, and bold planning. The path to sustainability isn’t a straight line. But with the right combination of technology, data, partnerships, and human talent, we can build energy systems that are clean, smart, and strong enough to power our future.
After all, sustainability is not a risk—it’s a responsibility. And done right, it can be one of our greatest strengths.
Have a great and impactful week!
Luis Marçal
Siemens Smart Infrastructure Country Business Head