"Of the ~92 million acres of corn planted in the US each year, roughly 40 million acres (1.6% of the nation’s land) are primarily used to feed cars and raise the octane of gasoline. If this land were repurposed with solar power, it could provide around three and a half times the electricity needs of the United States, equivalent to nearly eight times the energy that would be needed to power all of the nation’s passenger vehicles were they electrified.
However, if we were to transition this 40 million acres are of fuel to solar+food (agrivoltaics) – we could still meet 100% of our electricity needs, and power a nationwide fleet of electric vehicles."
(solar panels produce roughly 200 times more energy per acre than corn)
https://pv-magazine-usa.com/2022/03/10/solarfood-in-ethanol-...