NASA completed another study in 2012, with a vastly cheaper and more practical design enabled by new technologies. Here's a description: https://space.nss.org/s

NASA completed another study in 2012, with a vastly cheaper and more practical design enabled by new technologies. Here's a description: https://space.nss.org/sps-alpha-a-novel-approach-to-space-solar-power/ https://space.nss.org/sps-alpha-a-novel-approach-to-space-so... and the study itself: https://www.nasa.gov/directorates/spacetech/niac/2011_Practical_Solar_Power_Satellite/ https://www.nasa.gov/directorates/spacetech/niac/2011_Practi... A book-length treatment of modern SPS designs is The Case for Space Solar Power. It has detailed cost figures but was written before SpaceX had accomplished much, estimating a cost at gigawatt scale of 15 cents/kWh. I plugged in Starship launch costs and it came to 4 cents/kWh, which is not bad for 24/7 clean power without storage.