The whole thing is a red herring. How many of these old antennas exist, maybe a dozen? At "25 homes" each, it doesn't meaningfully impact the cited 50 TWh need.

The whole thing is a red herring. How many of these old antennas exist, maybe a dozen? At "25 homes" each, it doesn't meaningfully impact the cited 50 TWh need. Sure the structure is free so why not, but even that needs maintenance, just ask Arecibo. It's unclear from the article if they plan to use these as sun-tracking panels, but the burden of that would make it rapidly economically unfeasible.