Have grazing animals on natural meadows instead of artificially sown lawn and you’ll not only have the trimming taken care of but also support a variety of plant and animal life under your panels. Sheep and bunnies for example are ideal for the job, don’t you think RamRabbit :-)

Unfortunately, the most American thing this girl had ever heard of is also strongly affecting white-tailed sea eagles and other raptors in Germany and neighboring countries. Choose lead free ammo, folks. https://www.bund.net/themen/naturschutz/jagd/bleimunition/