The recent blackout in parts of Spain has sparked a wave of speculation, especially in Chinese media, blaming the incident on an ‘over-reliance on renewables’, and the ‘premature phase-out’ of coal and nuclear power. It’s a tidy narrative. But like many tidy narratives, it oversimplifies a complex system and misplaces the blame.
Managing fluctuations is grid’s job
Blaming a blackout on solar energy is like blaming a burst pipe on the water inside it. Variable output is a natural feature of solar and wind–it’s not a design flaw. The job of the grid is to anticipate and manage these fluctuations. When it fails to do so, the issue lies in system preparedness and operational response, not in the technologies supplying the power.
Some commentators have pointed to a lack of inertia or insufficient frequency control, implying that Spain’s clean energy push left the grid vulnerable. But this overlooks the fact that Spain has long been aware of these technical needs. Its mainland grid still includes significant nuclear, hydro, and thermal capacity—all of which help maintain stability. And while Spain has also invested in synchronous condensers, these have been deployed only on its island systems, which are not connected to the Iberian Peninsula grid. They couldn’t help in this incident—but their existence reflects a broader awareness of what grid reliability requires.
What might have gone wrong
At the time of publication, the exact cause of the outage hasn’t been made public. But based on how modern power systems work, we can reasonably assume it falls into one of three categories:
- external shocks, such as extreme weather, a cyberattack, or sabotage;
- planning gaps, where foreseeable conditions weren’t adequately modeled;
- operational failures, where systems didn’t activate or perform as designed.
None of these scenarios justifies blaming any specific generation technology. Even if a sudden drop in solar output played a role, the root issue would still lie in how the system was configured to respond. Power grids are built with the assumption that variability exists. When something goes wrong, we should look at what failed in the response—not what caused the fluctuation.
Fossil fuels don’t own frequency stability
One of the most persistent myths in the energy debate is that only fossil fuel plants can provide frequency stability. In reality, frequency regulation is a service–not an inherent trait of any particular technology. And it can be delivered by a range of sources, including: Battery storage, flywheels, synchronous condensers, demand-side response as well as hydro and even certain thermal plants, when configured appropriately.
Wind power is part of this toolbox too. In several European countries, wind generators already provide frequency response. But this only works when market structures reward them for doing so. The real question is not just technical feasibility—it’s whether the regulatory framework encourages a wider pool of technologies to participate in system balancing.
Modern grids secure these services via contracts or market auctions, choosing the most cost-effective and reliable providers. Sometimes this means keeping a coal power plant online longer than planned. Other times, it means converting it into a synchronous condenser or installing new battery systems. The key is performance and cost, not ideology or nostalgia.
Energy transition requires better systems, not backtracking
There is no doubt that operating a power system with a high share of renewables requires more complex planning and coordination. It places greater emphasis on system flexibility, fast response mechanisms, and advanced forecasting. But this is not a reason to retreat from clean energy. It is a reason to invest in grid modernization and institutional reform.
When a blackout occurs, it is tempting to blame new technologies. But doing so distracts from the more important work: improving how the grid is governed, how resources are integrated, and how reliability services are valued and procured.
The solution is not to preserve the old energy system out of habit or fear. It is to design a more adaptive, technology-neutral framework for the one we need going forward.
Spain’s blackout will eventually yield detailed lessons once the investigation concludes. But one thing is already clear: blaming solar or wind power is premature and unhelpful. The real test is whether grid operators and policymakers are building systems resilient enough to accommodate a changing energy mix.
Clean energy technologies are not the cause of instability. The question is whether our grids and the policies behind them are keeping up with the pace of change.