Ever More Frequent Negative Electricity Prices: A New Reality and Challenges for Photovoltaics and Wind Power in a Changing Energy Market—Threat or Opportunity, and Where Are the Limits of Sustainability?

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In recent years, negative electricity prices have ceased to be a rare phenomenon and are becoming a new reality in markets with a high share of renewable energy sources. This introductory article examines the increasing frequency of negative prices—particularly in Germany—as a consequence of the rapid expansion of solar and wind power plants. It highlights the sharp decline in the so-called capture rate for renewable producers and outlines technical, market-based, and regulatory solutions to this challenge. As the energy transition accelerates, key questions emerge concerning grid flexibility, market design, and investment returns. This article also serves as a call to researchers, analysts, and energy professionals to join the ongoing discussion by contributing their insights, case studies, and innovative solutions to this Special Issue of Energies. Are negative prices merely a transitional side effect of decarbonization or a warning sign of deeper systemic inefficiencies? Join the debate and help shape the future of sustainable energy.