<p>Renewable energy technologies derived from bio-inspired nanomaterials possess transformative potential to meet the demands of the modern energy crisis. They are emerging gradually with the development of micro- and nanotechnology, which enhances energy capture, storage, and utilization. This review article examines bio-inspired renewable energy nanomaterials, highlighting their applications in solar energy conversion, energy storage, and energy harvesting from vibrations and waste sources. It also explores strategies for waste reduction and resource efficiency. Furthermore, the article provides an in-depth overview of bio-inspired materials’ principles, applications, and future potential in sustainable energy technologies. By integrating insights from nature, these materials offer innovative solutions for improving energy efficiency and reducing environmental impact. This review is a valuable resource for scientists, engineers, and policymakers aiming to develop greener and more sustainable energy systems for the future.</p>