The U.S. military is undertaking a massive shift away from petroleum and other fossil fuels, and into a new clean energy future that relies on solar power, geothermal power, and other sustainable sources. Much of the activity is focused on large installations at  military bases, such as a new solar array at Pearl Harbor and new geothermal facilities at Fort Drum. However, some of the most interesting stuff is portable solar power, designed for the high-mobility, energy-scavenging fighting force of the future. It can’t come a moment to soon, as witnessed by the logistical nightmare of trucking in conventional fuel to troops in Afghanistan. Here are five new portable solar technologies to look out for:

(Soldier by U.S. Army on flickr.com)