Aktchully, the ideal height to install solar for max benefit for plants is also high enough to allow for large animals and people to pass right under them! (This isn't really a new finding, tbh)
It’s about 6 foot off the ground, or higher, and well-spaced. This allows sunlight to reach the whole ground as the sun moves, while still providing adequate shade to reduce plant burn and soil drying.
Not difficult at all, just longer posts. Everything else is exactly the same as if tou installed it 3-or-whatevers-standard foot from the ground.
As for tornadoes, they don't happen in most places nearly as often as certain places in the US, just due to how they form and the conditions necessary, so largely irrelevant to most of the world. But beyond that, being near, but not on, the ground doesn't offer a lot of help in tornado force winds for something like solar. It’s likely to get damaged regardless how tall it is.