With an emphasis on their various uses in solar cells (SC), photo-detectors, and sensing energy conversion technologies, this chapter examines the promising role of MXenes (MXs) in renewable energy systems. Because of their superior electrical conductivity, adjustable surface chemistry, and high mechanical strength, the MX family of two-dimensional materials has drawn a lot of interest and is a prime contender to improve the efficiency of renewable energy devices. With highly adaptable qualities that put such structure at the forefront of technological innovation, MX has quickly become a ground-breaking class of materials. Based on their extraordinary development, MX-based materials are now recognized as flexible platforms for a variety of uses, offering a toolkit for the customized design of cutting-edge materials that can solve present and upcoming social issues. MX's distinct physicochemical properties including remarkable thermal, electrical, optical, and mechanical properties—are the cause of the rise in unanticipated applications. In-depth critical knowledge of MX is presented in order to facilitate new discoveries in the fields of industry and research. This chapter also illustrates how MX can be utilized to improve the performance of photovoltaic cells, increasing light absorption and charge transport, and its potential to revolutionize energy conversion in photodetectors and other systems. Additionally, it delves into the sustainability aspects, emphasizing how MX can contribute to the development of eco-friendly and cost-effective renewable energy technologies. Through a comprehensive review of recent advancements, this chapter underscores the transformative potential of MX in addressing global energy challenges and supporting the transition toward sustainable energy solutions.