Space power-whats old is new again

The nation is presently seeking smaller and faster space missions that cost less. Furthermore, there is pressure to spin off technologies into the commercial sector as well as spin in technologies to the space program. In this environment, ideas that were dismissed in the past have come to the forefront again. This paper discusses high performance photovoltaic devices, solar dynamic systems, new batteries and power management and distribution schemes. Spin offs of power technologies are impacting aeronautical, terrestrial and naval applications as well. It is believed that interactions with terrestrial commercial industries will lead to deeper understanding of how to reduce space costs as well as increasing quality and reliability.<>