· 4 min read
Europe is in the midst of an energy transformation. Wind and solar are now the continent’s largest sources of new power capacity, and by 2030, most EU countries aim to get well over half of their electricity from renewables. But as the pace of deployment accelerates, so too do the pressure points—and one of the most urgent is the grid.
Electricity grids built in the 20th century were designed for centralized, fossil-based power systems. But today, we are asking them to handle something entirely different: variable, distributed, inverter-based generation—often located far from traditional industrial centers. Without a major leap in grid integration and digital control, even the most ambitious clean energy targets will fall short.
The blackout in Spain earlier this year was a warning: not that renewables are a threat, but that the system must evolve if they are to play the central role we need them to.
The infrastructure gap is growing
Europe’s electricity network has not kept up with its energy ambitions. In 2022, more than 50 GW of new wind and solar projects across the EU were delayed due to grid constraints, and grid congestion costs reached record highs. Cross-border interconnections remain underdeveloped, especially at the edges of the continent. Spain and Portugal, for instance, still have less than 3% interconnection capacity with the rest of Europe—well below the EU’s own 15% target.
This weak connectivity reduces resilience, drives up prices in isolated regions, and increases curtailment of clean energy. In the case of Spain’s 2025 blackout, limited access to external balancing power was a key factor in the system’s failure to recover once instability began. Simply put: the more connected the grid, the more robust and efficient the energy transition becomes.
Grid modernization: from metal to intelligence
But it’s not just about building more power lines. The future grid must also be smarter.
The blackout report from Spain emphasized the importance of fast-responding voltage and frequency control, better situational awareness, and the ability to manage distributed assets in real time. These are not just technical details—they’re critical infrastructure needs.
In a renewable-heavy system, stability must come not from inertia, but from intelligent coordination: advanced forecasting, grid-forming inverters, flexible demand, and real-time digital control. Europe must invest not just in wires, but in data, sensors, and algorithms.
Several countries are beginning to move in this direction. Germany is trialing dynamic grid services from batteries and solar. The Netherlands has launched congestion management pilots using flexible contracts. But broader, EU-wide coordination is still missing.
Markets must evolve alongside infrastructure
Modern grids need modern markets. Yet Europe’s electricity market design remains fundamentally tied to fossil-era logic.
Today, electricity prices in most European markets are set by the marginal cost of the last generator required to meet demand—often a gas-fired power plant. This means that when gas prices spike, electricity prices follow—even if most of the power comes from low-cost renewables. In a decarbonizing world, this makes little sense.
The European Commission has already proposed reforms to “decouple” renewable electricity from fossil fuel price volatility. But implementation remains uneven. To fully unlock the potential of clean energy, new market models must reward flexibility, long-term contracts, and system services—not just kilowatt-hours.
This includes:
• Accelerating the rollout of two-way contracts for difference (CfDs) for renewables.
• Creating dedicated markets for flexibility and grid services.
• Rewarding dispatchable clean resources like green hydrogen, demand response, and storage.
Without these changes, Europe risks building a clean energy system that still operates on outdated economic signals.
The Spanish blackout: a lesson in systems thinking
What happened in Spain was not a failure of wind or solar. It was a failure of coordination—between transmission operators, markets, and outdated design rules. The solution isn’t more fossil back-up, but a smarter, more integrated, and more responsive grid.
Voltage collapsed not because there was too much renewable energy, but because key transmission lines were out of service, synchronous plants weren’t running, and protections were not adapted to the new system dynamics. The grid simply wasn’t prepared for the type of generation mix it had successfully built.
That same story could repeat elsewhere—unless we learn from it.
Conclusion
Europe’s energy future will be renewable. But whether it is reliable, affordable, and resilient depends on what we do next.
We need to connect our grids more deeply, modernize how they operate, and reform the markets that underpin them. That means treating grid expansion as a pan-European priority—not just a national one. It means investing in software and sensors, not just steel and substations. And it means aligning price signals with the true cost and value of clean energy.
In previous publications, I’ve written about how Europe can secure its energy future without fossil fuels. But to do that, we must also secure the infrastructure and institutions that make energy work. The lesson from Spain is not that renewables are unstable. It’s that our systems aren’t ready for the scale of change we’ve already triggered.
Now is the time to fix that—not by slowing down the transition, but by accelerating the reforms that will make it succeed.
illuminem Voices is a democratic space presenting the thoughts and opinions of leading Sustainability & Energy writers, their opinions do not necessarily represent those of illuminem.
