Bourne Energy‘s “militarized” luggable hydroelectric plant measures 3 feet in length and weights around 25 pounds. It can be transported to a water source by one person, then set up either on the surface of the river or, ninjalike, completely submerged.

[I]t is self-contained with its own integrated power, control, cooling and sensor systems. The unit collapses into three major parts which slide into a large backpack. The BPP-2 produces up to 20% more power (600W) and can be set up singularly or in arrays of over 20 kW. The BPP-2, which operates silently with no heat or exhaust emissions, is 40% less visible during operation and can also be bottom mounted to be totally invisible.

[via Wired Science]