Renewables don't risk blackouts, said the media. But they did and they do. The physics are simple. And now, as blackouts in Spain strand people in elevators, jam traffic, and ground flights, it's clear that too little "inertia" due to excess solar resulted in system collapse.
Six days ago, the media celebrated a significant milestone: Spain’s national grid operated entirely on renewable energy for the first time during a weekday.
At 12:35 pm today local time, the lights went out across Spain and Portugal, and parts of France. Although power was quickly restored in France, it could take a week to fully restore power in Spain and Portugal.
In an instant, the electric hum of modern life — trains, hospitals, airports, phones, traffic lights, cash registers — fell silent. Tens of millions of people instantly plunged into chaos, confusion, and darkness. People got stuck in elevators. Subways stopped between stations. Gas stations couldn’t pump fuel. Grocery stores couldn’t process payments. Air traffic controllers scrambled as systems failed and planes were diverted. In hospitals, backup generators sputtered on, but in many cases could not meet full demand.
It was one of the largest peacetime blackouts Europe has ever seen. And it was not random. It was not an unforeseeable event. It was the exact failure that many of ushave been, repeatedly, warning lawmakers about for years — warnings that Europe’s political leaders systematically chose to ignore.
While Portugal’s grid operator REN initially blamed the mass blackout on “extreme temperature variations” and a “rare atmospheric phenomenon,” and while some media repeated that framing, the reality is more serious. Weather may have triggered the event, but it was not the cause of the system’s collapse.
Spain’s national grid operator, Red Eléctrica, revealed that the immediate cause of the blackout was a “very strong oscillation in the electrical network” that forced Spain’s grid to disconnect from the broader European system, leading to the collapse of the Iberian Peninsula’s power supply at 12:38 p.m.“No one has ever attempted a black start on a grid that relies so heavily on renewables as Iberia,” noted @JKempEnergy . “The limited number of thermal generators will make it more challenging to re-establish momentum and frequency control.”In a traditional power grid dominated by heavy spinning machines — coal plants, gas turbines, nuclear reactors — small disturbances, even from severe weather, are absorbed and smoothed out by the sheer physical inertia of the system. The heavy rotating mass of the generators acts like a shock absorber, resisting rapid changes in frequency and stabilizing the grid.
But in an electricity system dominated by solar panels, wind turbines, and inverters, there is almost no physical inertia. Solar panels produce no mechanical rotation. Most modern wind turbines are electronically decoupled from the grid and provide little stabilizing force. Inverter-based systems, which dominate modern renewable energy grids, are precise but delicate. They follow the frequency of the grid rather than resisting sudden changes....
Louder for the people in the back: Weather may have triggered the event, but it was not and cannot be the cause of the system’s collapse.
If you are an electric grid operator blaming the weather for your blackout, you should be fired!
And if you are a politician blaming the weather for blackouts, fires, or floods, the voters should fire you. Seriously! You're only advertising your own incompetence!
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