"The United States Marines are already using solar panels to reduce their reliance on fuel generators, but by 2025, the few and proud hope eliminate the diesel-chugging monstrosities entirely. The Office of Naval Research has announced new partnerships with Raytheon, Battelle and Emcore to develop a transportable hybrid system that would leverage solar energy, heat and biofuel to power a Marine outpost for up to 15 days. Not only would these systems run much quieter, but they'd also reduce the need for fuel supply convoys, which are prime targets for attack in battle settings."
engadget