It's even stupider than that, it's not even to appease his base, it's a personal grudge. Trump sued a wind energy company to prevent them from building an off-shore wind farm in view of his golf resort in Scotland. He lost that case badly and he has been railing against wind energy specifically ever since.

So far Trump hasn't done much to prevent solar farms from being built, it's only wind turbines that he's exacting his vengeance on like some sort of modern day Don Quixote.