In a move that has sent ripples through European energy markets, Germany is reportedly considering a temporary revival of coal-fired power plants to shore up its electricity supply amid ongoing natural gas shortages and the phase-out of nuclear energy. The proposal, which would involve idled plants being brought back online, has drawn an urgent response from the UK’s National Grid, which warns that such a decision could undermine cross-border energy stability.
According to documents seen by Der Spiegel, the German government is evaluating the reactivation of up to 10 gigawatts of coal capacity for a limited period, possibly extending into 2024. This represents a significant reversal for a nation that has championed the Energiewende, or energy transition, aiming to slash coal use by 2030. The rationale is stark: Russian gas flows have plummeted to a fraction of their pre-war levels, and the country’s last three nuclear reactors were shut down in April 2023. With winter approaching and storage levels below the five-year average, Berlin is exploring every option to avert blackouts.
However, the UK’s Electricity System Operator (ESO) has issued a cautionary statement, highlighting the interconnected nature of European grids. Through interconnectors such as the Nemo Link (Belgium) and the IFA (France), the UK imports and exports electricity with the continent. A sudden increase in German coal generation could lead to higher carbon emissions across the bloc, potentially straining the UK’s own carbon budgets. Moreover, any instability in Germany’s grid could propagate via these interconnectors, affecting frequency and voltage on the British side.
Dr. Helena Vance, Science & Climate Correspondent, notes that the physics of electricity transmission is indifferent to political borders. 'When Germany burns coal, the CO2 doesn’t stop at the border. The UK’s grid operates at 50 Hz, synchronized with the continental European system. If Germany’s supply becomes erratic due to coal plant outages or ramp-up issues, it can cause phase shifts that trip safety systems in the UK. This is not speculation; it happened in 2019 when a sudden drop in German wind output caused a near-blackout in London.'
The irony is palpable. Germany’s coal revival is a response to a crisis partly of its own making: the simultaneous phase-out of nuclear and heavy reliance on Russian gas. Meanwhile, the UK, which has maintained a more diverse mix including gas, wind, and nuclear, faces the paradox of being vulnerable to decisions made in Berlin. Environmental groups have condemned the move, with Greenpeace calling it a 'climate catastrophe' that could delay the transition to renewables by years.
Yet, the technical reality is that coal-fired plants offer dispatchable power, something that solar and wind cannot guarantee without massive storage. Germany’s renewable capacity has grown substantially, but it remains intermittent. The country is investing in hydrogen and battery storage, but these technologies are not yet at scale. The coal revival, therefore, is a short-term fix that carries long-term consequences.
For the UK, the warning from the ESO is a reminder that energy security is a collective endeavour. The nation has its own coal plants, though most are scheduled to close by 2024. The government has granted a temporary extension to one plant this winter, but it is a fraction of Germany’s potential capacity. As the continent grapples with the fallout from geopolitical upheaval, the clean energy transition is being stress-tested in real time. The outcome will determine not just emissions targets but the resilience of the entire European grid.
In the coming weeks, EU energy ministers will convene to discuss this very issue. The hope is that a coordinated approach can stabilise prices and supplies without resorting to coal. But as the weather turns colder and the geopolitics remain volatile, the temptation to burn more coal grows. The UK’s grid operator is right to be cautious, but caution alone will not keep the lights on.
