For military portable power fields of use, the Stirling generator offers several unique advantages. This highly efficient, hermetically-sealed unit allows for reliable operation even in harsh battlefield environments. The large, and not very portable gensets, being used for troop power have a life expectancy that can be as short as a month in harsh environments (e.g., dusty, hot). The current solution is to have a perpetual logistics chain delivering new gensets. The Stirling engine can afford the same reliability, coupled with very good specific power density, while also providing a minimal noise signature.
Sunpower has developed and provided Stirling engines for a prototype 160W portable military battery charger. The program has developed a successful prototype, and Sunpower is now exploring options for full commercialization with system integrators.