The finiteness of the Earth's fossil-fuel reserves are discussed and the world energy needs are projected to show that alternative energy sources to nuclear power merit consideration. A satellite solar power station is proposed to generate power to meet future requirements. Considerations are given to orbital location, solar energy conversion devices, transmittal equipment and Earth-receiving stations. The use of photoconductive organic materials to form thin film solar collector surfaces and generation of microwave radiation to transmit energy to an Earth-based antenna are discussed. The design considerations and the development tasks for a large satellite solar power station are reviewed and the potential technological needs are identified. The suggestion is made that the technology developed for the space program may find application in a satellite solar power station to generate power for use on Earth.