Mitsubishi Electric Corp. and IHI Corp. will join a ¥2 trillion Japanese project to build a giant solar power generator in space within three decades and beam electricity to Earth.
A research group representing 16 companies, including Mitsubishi Heavy Industries Ltd., will spend four years developing technology to send electricity without cables in the form of microwaves, according to a statement on the trade ministry's Web site Tuesday.
"It sounds like a science-fiction cartoon, but solar power generation in space may be a significant alternative energy source in the century ahead as fossil fuel disappears," said Kensuke Kanekiyo, managing director of the Institute of Energy Economics, a government research body.