A review of solid oxide fuel cell (SOFC) technology as an efficient energy conversion system is presented. The paper discusses the components, materials, design, operation, and integration strategies of SOFCs with existing thermal-based power plants. It summarizes the performance and prospects of various SOFCs in standalone and hybrid modes, along with their limitations. The research and commercialization efforts that can enhance the potential applications of SOFCs as a sustainable and reliable system in the long term are also outlined. SOFCs are a type of fuel cell that directly converts chemical energy into electrical energy through an electrochemical reaction. They operate at high temperatures, which allows for high efficiency and fuel flexibility. SOFCs are suitable for electricity generation due to their hot reaction products, higher cell voltage, higher system efficiency, and fuel flexibility. They emit negligible emissions, with minimal traces of nitrogen oxides, carbon monoxide, hydrocarbons, and sulfur oxides. The paper discusses the design of SOFCs, including planar, tubular, and monolithic designs. It also covers the operation of SOFCs, including fuel processing, basic principle of operation, and electrochemical reactions. The paper also discusses the integration of SOFCs with other systems, such as gas turbines and steam turbines, to improve overall efficiency and performance. The paper highlights the challenges in SOFC technology, including polarization losses, high operational temperatures, and the need for expensive materials. It also discusses the commercialization of SOFCs, including their applications in portable power generators, small power systems, and large-scale distributed generation power plants. The paper concludes with the research challenges in SOFC technology, including manufacturing cost, increased reliability, and reduction of polarization losses.A review of solid oxide fuel cell (SOFC) technology as an efficient energy conversion system is presented. The paper discusses the components, materials, design, operation, and integration strategies of SOFCs with existing thermal-based power plants. It summarizes the performance and prospects of various SOFCs in standalone and hybrid modes, along with their limitations. The research and commercialization efforts that can enhance the potential applications of SOFCs as a sustainable and reliable system in the long term are also outlined. SOFCs are a type of fuel cell that directly converts chemical energy into electrical energy through an electrochemical reaction. They operate at high temperatures, which allows for high efficiency and fuel flexibility. SOFCs are suitable for electricity generation due to their hot reaction products, higher cell voltage, higher system efficiency, and fuel flexibility. They emit negligible emissions, with minimal traces of nitrogen oxides, carbon monoxide, hydrocarbons, and sulfur oxides. The paper discusses the design of SOFCs, including planar, tubular, and monolithic designs. It also covers the operation of SOFCs, including fuel processing, basic principle of operation, and electrochemical reactions. The paper also discusses the integration of SOFCs with other systems, such as gas turbines and steam turbines, to improve overall efficiency and performance. The paper highlights the challenges in SOFC technology, including polarization losses, high operational temperatures, and the need for expensive materials. It also discusses the commercialization of SOFCs, including their applications in portable power generators, small power systems, and large-scale distributed generation power plants. The paper concludes with the research challenges in SOFC technology, including manufacturing cost, increased reliability, and reduction of polarization losses.