In January 2026, German Chancellor Friedrich Merz made a public admission that would have been politically unthinkable a decade earlier: Germany’s nuclear phase-out was a mistake, the Energiewende in its current form has become too expensive and unsustainable, and the country does not have sufficient electricity generating capacity despite more than two decades of investment and a installed renewable base that now reaches a multiple of peak power demand. The statement represents the most direct official acknowledgment to date that the strategic assumptions underpinning Germany’s energy transition require fundamental reassessment.
The scale of the investment that produced this outcome demands scrutiny. Germany has spent an estimated sum exceeding one trillion U.S. dollars on its energy transition over more than twenty years, tripling installed generation capacity through wind and solar deployment. Yet the Bundesnetzagentur, Germany’s federal network agency, stated in September 2025 that electricity supply will only remain secure if additional controllable capacity is built, a formulation that implicitly concedes the current system cannot guarantee reliability without dispatchable backup. The network agency’s base case projects a requirement for 20 to 22 gigawatts of new gas capacity by 2035, rising to 36 gigawatts in a downside scenario involving delays in wind and solar rollout, grid expansion, and demand flexibility. To put the upper bound in physical terms, 36 gigawatts of gas capacity is roughly equivalent to 72 Rostock-sized coal-fired power stations, a construction program of a scale and speed that Germany’s recent infrastructure record does not support. The Berlin Brandenburg Airport required more than twenty years from planning to operation.
The Bundesnetzagentur’s capacity value assessments for the existing renewable fleet are telling. The agency attributes 0 to 5% of peak power value to solar and 10 to 20% to wind, figures that reflect the fundamental challenge of Dunkelflaute, the extended periods of low wind and minimal solar irradiation that occur during German winters. During the 2026 winter, multiple Dunkelflaute events coincided with colder-than-average temperatures, stress-testing the system in precisely the conditions where wind and solar contribute negligibly to generation. The practical implication, that dispatchable capacity must be sized to cover near-total renewable absence, is embedded in the network agency’s own capacity requirement projections, even if it rarely features prominently in the political framing of the energy transition.
Battery energy storage systems are frequently cited as the mechanism through which variable renewable output can be smoothed into a reliable supply, but the physics of duration imposes hard limits on this argument. Grid-scale battery systems at current commercial deployment scales shift generation by one to two hours. Addressing multi-day Dunkelflaute events would require battery installations sized at parity with total wind and solar installed capacity, a capital requirement so large as to be practically irrelevant to near-term planning. The discourse around storage as a solution to intermittency often elides this distinction between short-duration buffering and multi-day reliability, a conflation that does not survive contact with winter weather events of the kind Germany experienced in early 2026.
The gas storage situation during the 2025 to 2026 winter brought these system vulnerabilities into sharp relief. Storage levels by late February 2026 fell below the lows recorded in 2022, the year Russia’s attack on Ukraine and the destruction of the Nord Stream pipeline precipitated Europe’s first serious post-Soviet gas security crisis. At the 20% storage level, operational problems, including pressure-related damage to storage infrastructure, become significant concerns before the headline supply risk materializes. The critical threshold of 10% storage, at which supply constraints become acute, was approached closely enough that weather normalization in late February represented a material system event rather than a routine seasonal transition. Under base case conditions with normal weather and only moderate Dunkelflaute probability, the risk of power shortages requiring controlled partial load shedding remains present even in the absence of extreme weather.
The political divergence on energy strategy within the CDU itself illustrates the degree to which the underlying technical and economic realities have not produced a coherent policy consensus even within a single party. Chancellor Merz, having served as BlackRock’s Germany chairman before entering government, has framed the energy transition’s current form as economically unsustainable and technically insufficient. European Commission President Ursula von der Leyen, also a CDU member and a former minister under Angela Merkel, stood in New York in September 2025, declaring a new age of renewable abundance and citing two trillion dollars in global clean energy investment in the prior year as evidence of the transition’s momentum. Both statements reflect genuine aspects of the energy landscape; large capital flows into renewables are empirically real, as are Germany’s capacity adequacy problems, but the gap between them points to a deeper analytical failure in how policymakers receive and process technical advice about system reliability.
The question of who informs these divergent political positions, and what interests shape the advice flowing to decision-makers, is not merely rhetorical. The installed capacity expansion that produced Germany’s current renewable base generated substantial revenues for equipment manufacturers, project developers, grid operators, and financial intermediaries, regardless of whether it produced reliable, affordable electricity for German households and industry. The incentive structures around energy transition investment do not automatically align with system outcomes, and the institutional distance between project-level economics and system-level adequacy assessments creates conditions where optimistic capacity figures can coexist with acknowledged reliability deficits.
Germany’s industrial competitiveness dimension adds a further layer of urgency that the capacity adequacy debate alone does not capture. German industry has historically depended on competitive electricity pricing as a partial offset to high labor costs. The Energiewende’s combination of renewable surcharges, grid expansion costs, and the backup capacity costs embedded in the system has produced electricity prices for industrial users that are among the highest in Europe, undermining the cost position of energy-intensive manufacturing sectors at a moment when Germany already faces structural economic pressure from reduced export competitiveness.
The Hunga Tonga volcanic eruption of January 2022, the largest recorded underwater eruption to reach the stratosphere, adds a degree of complexity to the attribution of recent climate anomalies that is analytically relevant even if it remains contested. The eruption injected extraordinary volumes of water vapor into the stratosphere, a layer of the atmosphere where water vapor has well-documented effects on global warming rates. Researchers, including Dr. Javier Vinós, have argued that the subsequent 2023 and 2024 warming, which produced anomalies including the Amazon drought of 2023, record low Antarctic sea ice, and the longest-lasting tropical cyclone on record in the Indian Ocean, was materially influenced by this stratospheric water vapor injection in ways that operate on top of the anthropogenic warming trend. Temperature readings began retreating from these heights from late 2025 onward, consistent with the multi-year dissipation of stratospheric water vapor loading. This does not alter the long-term trajectory of climate change, but it does complicate the attribution of specific recent extreme weather events and reinforces the case for analytical humility about isolating individual causal factors in a nonlinear climate system.
For Germany specifically, the winter stress test of 2026 produced a system response that has made the gap between political narrative and physical reality more difficult to maintain. The Merz admission is significant not because it resolves the policy debate but because it establishes that the debate must now proceed from a more honest baseline about what the current system can and cannot deliver. Adding controllable dispatchable capacity, whether through new gas plants, life extensions, or new builds of nuclear capacity, or some combination, while continuing renewable deployment, represents a more technically coherent pathway than the current framing in which variable renewables and storage are presented as a self-sufficient reliability solution. The Bundesnetzagentur’s own capacity projections effectively encode this conclusion, even if the political environment has been slow to translate it into revised deployment priorities.
