At the height of the oil crisis in the 1970s, the US government considered building a network of 60 orbiting solar...

At the height of the oil crisis in the 1970s, the US government considered building a network of 60 orbiting solar power stations that would beam energy down to Earth. Each geosynchronous satellite, according to this 1981 NASA memo, was to weigh around 35,000 to 50,000 metric tons. The Satellite Power System (SPS) project envisaged building two satellites a year for 30 years.
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https://motherboard.vice.com/en_us/article/ezvj4j/the-747-to-space-that-never-was