Actually, you're probably right. However, in many markets you actually "make" more money by offsetting the price you would pay the utility. In my calculations, you get paid a fifth of the excess electricity than just using it (instead of paying the utility to use theirs). So when you're a heavy user, and you're in great solar area, every panel you add actually lowers your cost. So if you want, do a 4 acre solar farm for a 1 acre building, and over time this will pay for itself.

Of course, this obviously depends on you making money on the wheat or other crops.