âWearable microgridâ harvests energy from sweat and movement 09 Mar 2021 Professional Engineering The wearable microgrid uses energy from human sweat and movement to power an LCD wristwatch and electrochromic device (Credit: Lu Yin) Human sweat and movement can power small electronic devices thanks to a new âwearable microgridâ that harvests and stores energy from the body. Inspired by small-scale community energy projects, the system was developed by nanoengineers at the University of California San Diego. The wearable microgrid consists of three main parts – sweat-powered biofuel cells, motion-powered devices called triboelectric generators, and energy-storing supercapacitors. All parts are flexible, washable and can be screen printed onto clothing.