I wonder if you realized how much of a point in favour of Solar Panels you just made...
Replace Illinois corn farms specifically meant for Ethanol production with Solar Farms and Battery Storage. You likely just generated enough power to power all of Illinois.
No, not just Illinois. That would be enough power the whole country.
Illinois uses 11-million acres to produce 13% of the US corn supply. A typical utility-scale solar deployment generates 300 to 500 MWhrs / yr, which multiplies to 3,300 to 5,000 TWhrs / yr for converting all Illinois corn to fields of panels with typical row spacing. Total yearly electricity demand in the US is about 4,000 TWhrs, so that's either just below or just above enough yearly electricity to cover all US demand. Naturally it's not that simple because you'd also need a bunch of batteries to cover night and evening demand, and you'd still have some seasonal mis-match that can't be economically covered by batteries, and we anyways are going to continue operating a lot of existing hydro dams and nuclear plants and wind turbines and whatnot. But from a crayon art perspective, yeah, Illinois corn farms are on the order of the land area needed to shift the US to 100% solar generation.
Bioethanol consumes 33% of all US corn production to power 6% of our transport miles. Converting our cars to EV would leave that land without a use, and were we to fill it with solar, it would generate enough electricity to power 100% of transport miles, plus all electricity demand, electrification of all residential and commercial heating demand, electrification of all hydrogen production for the chemical industry, and a pretty large surplus of energy for other things. Of course, it's also about $10T in capex, so, non-trivial, but the key point is that land isn't the bottleneck.