Solar Panels, for CIVIL discussion
Iowa uses about 45.7TWh of electricity. Even if all those bars are added together (not including deprecated or replaced systems), we're looking at 480MW of installs - or 0.01% of solar generation in the state. Annual average growth in demand since 1968 has been about 1.47%.
If solar penciled out, they'd be installing it at more than 10% of annual demand increases. If I had to guess, if I keep digging, I'm going to find out Iowa is installing solar for the same reason so many EVs are only available in CA: compliance.