<p>Hydrogen is increasingly recognized as a promising clean energy carrier due to its versatility, environmental compatibility, and potential to meet growing global energy demands. This review examines the simultaneous production of power and hydrogen from various energy sources, both renewable and non-renewable. The study highlights the advantages of renewable-based hydrogen production methods, particularly in terms of environmental sustainability, which has driven their growing acceptance. Various production techniques, including gasification, photolysis, electrolysis, and reforming, are analyzed for their efficiency and feasibility. Among these, high-temperature electrolysis, specifically using solid oxide electrolysis cells (SOECs), is identified as the most efficient method due to its lower electrical energy consumption. The review also delves into the integration of hydrogen production with existing power generation systems, emphasizing the benefits of cogeneration and multi-generation approaches. These technologies enhance energy efficiency and diminish greenhouse gas emissions, in accordance with global sustainability objectives. The paper compares the energy efficiency and economic viability of different hydrogen production methods, concluding that while fossil fuels offer higher efficiency and lower costs, they also pose significant environmental challenges. In contrast, renewable energy sources, particularly geothermal and solar energy, are more sustainable options for hydrogen production, despite higher initial costs. This comprehensive review provides a critical evaluation of the current technologies for hydrogen and power co-production, offering insights into the future direction of clean energy research and the potential for integrating hydrogen into global energy systems.</p>