"KODIAK, Alaska -- Darron Scott, CEO of the Kodiak Electric Association, unlocked the door to a small building on a gravel road along Chiniak Bay and pointed to two innocuous metal boxes tucked into a corner beyond a bank of computers.
'Those are the flywheels,' Scott said, turning on a computer screen to follow the ebb and flow of the system's electrical output.
More than a mile down the coast, a 340-foot-tall electric crane operated by Matson Inc. shipping company lifted a series of heavy metal cargo containers from the shore and transferred them onto the deck of a waiting ship.
Each time the regenerative crane raised a container into the air, it pulled electricity from the flywheel energy storage system. As it lowered its load, electricity flowed back to the flywheels."