Here's how the recent DDR&E Energy Task Force paper describes the goals for HI-Power:
Solutions currently being pursued include the development of active distribution networks and intelligent / automated hybrid power systems. Power management and distribution techniques will enable maximum power utilization with a high degree of efficiency for use with various mobile and portable applications in the 2 to 500 kilowatt range.This power management architecture will include small and medium sized tactical versions for mobile forces and larger transportable systems appropriate for forward operating bases. Initial models estimate fuel savings of up to 40 percent, reduced maintenance and personnel requirements, and fewer power interruptions. The resulting architecture shall impose minimum impacts on transportability, deployability, and readiness levels of current and upcoming platforms.