Sgt. Antonio M. Garay, left, supervises a routine

Sgt. Antonio M. Garay, left, supervises a routine maintenance check on the solar panels for the Ground Renewable Expeditionary Energy System with Lance Cpl. Ruben Moralessoto, center, and Lance Cpl. Angel Servin, right, during Nov. 4 exercise Chromite 15 on Camp Schwab. The solar panels are a backup source to the Marine Corps main power supply of diesel generators. The GREENS only require sunlight to operate, which can save money on fuel costs. The Marines maintaining the systems are with Communications Platoon, Headquarters and Service Battalion, 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force. Garay is from Tuscon, Arizona. Moralessoto is from Moca, Puerto Rico. Servin is from San Bernardino, California. (U.S. Marine Corps photo by Lance Cpl. Tyler S. Giguere/Released)