"A start-up in Northern California is working on creating 'solar windows' that could act as solar panels at the same time as blocking sunlight from entering office buildings to reduce their energy needs." The technology is a class of equipment that seeks to replace parts of buildings with solar panels to generate energy. Other possibilities include window awnings and roofing tiles.
Some of Pythagoras' windows are already installed 2MW's on Chicago's Willis Tower (formerly known as the Sears Tower.)
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