How big are panels? If you get 60 cell panels, about 68x45 inches/1.7m x 1.1m. Our home array is 60 of those, 24kw.

Example of a spec sheet: https://signaturesolar.imagerelay.com/share/ffc69ee2265b4613...

If you mean the farmers' arrays, those are meant for commercial generation, so a good bit bigger, but one nice thing about solar is it's extremely modular, and you can fit it to the land. I believe bigger panels are more common for commercial, but I think it's a lot nicer to handle 40-50 pound panels than 70 pound panels.