This study presents a literature review of research conducted between 2018 and 2022 on solar bio cells and their potential as an alternative source of renewable energy. Solar bio cells are devices that use photosynthetic microorganisms to convert sunlight into electrical energy. The literature review found that there has been significant progress in the development and optimization of solar bio cells, including the use of different types of microorganisms, electrode materials, and operating conditions. The study also discussed the advantages and disadvantages of solar bio cells, as well as the current and future challenges facing their development and commercialization. Additionally, the study reviewed the policies and initiatives implemented by various countries, including India, to promote the development and adoption of solar bio cells and other renewable energy sources. Overall, the literature review highlights the potential of solar bio cells as a sustainable and environmentally friendly source of energy, and provides insights into the research and policy developments in this field.